T
Table Accounting Code System
TACS
The Table Accounting Code System is tables that
are used during the update transaction validation phase in the FIMS
front-end processing. During this phase, FIMS database records(s)
that match the update transaction segment detail are accessed to
do more extensive validation. Information contained in a TACS table
serves to limit the kinds of data that can be accepted by FIMS for
certain fields.
Finance Division
tack coat
A tack coat is the initial application of asphaltic
material to an existing surface to ensure bonding between the superimposed
construction and the old surface.
tag-a-long trailer
A tag-a-long trailer is a utility or equipment
trailer with a pintle or captive-ball hitch.
Equipment Manual
tagout
Tagout is the placement of a tagout device on
an energy-isolating device, in accordance with an established procedure,
to indicate that the energy isolating device and the equipment being
controlled may not be operated until the tagout device is removed.
Occupational Safety Manual
tagout device
A tagout device is a prominent warning device,
such as a tag and a means of attachment, which can be securely fastened
to an energy isolating device in accordance with an established
procedure, to indicate that the energy-isolating device and the
equipment being controlled may not be operated until the tagout
device is removed.
Occupational Safety Manual
tailwater
Tailwater is the depth of flow in the stream directly
downstream of a drainage facility.
take area
A take area in eminent domain proceedings is the
physical linear or metric area of the property of which the condemnor
will permanently or temporarily deprive the owners use.
Right of Way Manual
taking
Taking is the process of obtaining right of way
by negotiation or eminent domain proceedings. Also that portion
of real property taken for transportation purposes.
Right of Way Manual
tandem axle load
Tandem axle load is the total load transmitted
to the road by two consecutive axles extending across the full width
of the vehicle. (
Note:
The spacing of the tandem
axles used at the AASHTO road test was 48 inches.) Pavement Design Manual
tangent length
The tangent length is the measurement from point
of curvature to point of intersection and from point of intersection
to point of tangent of a curve.
Survey Manual
tangents
T
Tangents are the straight section of a road.
Survey Manual
tare
Tare is a balance adjustment that excludes weights
of containers or other apparatus present on scale in conjunct with
material being weighed.
Manual of Testing Procedures
team
The team consists of the provider and all proposed
subproviders who will be working on a particular contract.
Engineering Architectural and Surveying Services
Manual
Technical Advisory Committee
TAC
A Technical Advisory Committee is part of a Municipal
Planning Organization.
technical assistance panel
TAP
A technical assistance panel is affiliated with
each Research Management Committee to provide input to the long
range research plan and technical expertise to assist in program
development. The TAP members will be from within TxDOT, FHWA, and
universities and may include representatives from other entities.
Research and Implementation Manual
technical expert
Technical expert is one who is qualified as an
expert in the valuation of a certain product other than real estate,
such as machinery, minerals, cost of special improvements, etc.
Right of Way Collection
technical manager
A technical manager is an assigned custodian of
information resources who provides technical facilities and support
services to owners and users of information. A technical manager
assists program management in the selection of cost effective controls
to be used to protect information resources. The technical manager
is charged with executing the monitoring techniques and procedures
for detecting, reporting, and investigating breaches in information
asset security.
Information Security Manual
Technology Services Division
TSD
The Technology Services Division (formerly ISD)
provides information technology hardware, software, services and
staffing to support and enhance the business operations of the department, including
the oversight and management of the statewide data center services
contract, develops and implements new systems and technologies,
provides photogrammetry services and supports statewide land surveying
and develops, maintains, manages and enforces TxDOT and State of Texas
IT policies, standards and procedures. The Director of TSD serves
as the department's Chief Information Officer, Information Resource
Manager, and Information Security Officer.
Technology Services Division
technical precertification
Technical precertification is a review process
conducted by the department to determine if a prime provider or
subprovider meets the technical requirements to perform work identified
in a work category.
Engineering Architectural and Surveying Services
Manual
technology transfer
Technology transfer means those activities that
lead to the adoption of a new technique or product by users, and
involves dissemination, demonstration, training and other activities
that lead to eventual innovation.
Research and Implementation Manual
temporarily assigned vehicle
A temporarily assigned vehicle is a vehicle temporarily
assigned to a division or office for its exclusive use and may be
used for local or out-of-town travel for periods greater than five
days and up to 90 days, with exceptions to be approved on a case-by-case
basis.
Equipment Manual
temporary access
Temporary access is the time-limited provision
of direct access to a roadway. Such access must be closed when permit
conditions for access removal are satisfied. Typically, such conditions
relate to such time when adjacent properties develop in accordance
with a joint access agreement or frontage road plan.
Access Management Manual
temporary assistance for needy
families
TANF
Temporary assistance for needy families is state-operated,
federally funded programs to provide assistance and work opportunities
to needy families.
Public Transportation Collection
temporary construction easement
A temporary right acquired by one party (from
the owner of real property) to use or control real property belonging
to another party for the purpose of construction. See also conveyance
document and right of entry.
temporary easement
The right to use and possession of a given tract
of land for the purpose and period of time stated in the instrument
of conveyance.
Right of Way Collection
temporary modified duty
Temporary modified duty is a short-term modification
or adjustment to a job or the work environment to allow an employee
to return to work who is temporarily disabled, has lost their driver license,
or has violated substance abuse policy.
Human Resources Manual
Temporary Fuel
Location
TFL
A temporary fuel location (TFL) is established
by the Texas Military Forces to provide diesel to buses carrying
special needs passengers during an evacuation. These locations also
include portable rest room facilities and oxygen bottles for these
special needs passengers and are not open to the general evacuation
population.
Maintenance Division
temporary sediment control fence
fabric
Temporary sediment control fence fabric is a woven
geotextile fabric conforming to the requirements of TxDOT Material
Specification “6230, Temporary Sediment Control Fence Fabric.” The primary
use is for control of sediment in surface runoff water.
Material Specifications
temporary sign
A temporary sign is any sign not permanently affixed
or attached to the ground or a structure, which can be removed without
special handling.
Maintenance Collection
tenant
A tenant a person who has the temporary use and
occupancy of real property owned by another.
Right of Way Manual
tensioning cylinders
Tensioning cylinders are cylinders used to determine
when the concrete strength is adequate to apply the final prestressing
force by the post-tensioning.
700-I, Structural Test Procedures Manual
terminal anchorage
- Terminal anchorage for a guard fence or concrete median barrier is an end treatment to anchor and prevent a spearing effect or excessive vaulting, and to help the deceleration of impacting vehicles.
- Terminal anchorage for pavement is the concrete anchorage system used as a bridge approaches or terminal points of continuously reinforced concrete pavement.
termination
Termination is the cancellation of the contract
before the completion date.
Contract Management Manual
termination date
Termination date is the date or event when a contract
expires.
Contract Management Manual
Terrain Evaluation and Retrieval
for Road Alignment
TERRA
Terrain Evaluation and Retrieval for Road Alignment
uses data prepared by Contour Analysis by Random Triangulation Algorithm
and calculates cross-section and profile data along a roadway alignment.
testing
Testing is the process by which the hazards that
may confront entrants of a permit space are identified and evaluated.
Testing includes specifying the tests that are to be performed in
the permit space.
Occupational Safety Manual
testing machine
A testing machine is a device designed to hold
specimens and to apply a force to the specimens. Testing machines
incorporate equipment to control the force and instruments to measure
it.
Manual of Testing Procedures
Texas Administrative Code
TAC
The Texas Administrative Code (TAC) is a compilation
of all state agency rules in Texas. Each title represents a category,
and relating agencies are assigned to the appropriate title.
Office of the Secretary of State
Texas Agricultural Extension Service
TAEXA
The Texas Agricultural Extension Service is a
sub-division of the Texas A&M University System.
Traffic Safety
Texas Air Control Board
TACB
Texas Air Control Board became a part of Texas
Natural Resource Conservation Commission in 1990.
Texas Association of Campground
Owners
TACO
Texas Association of Campground Owners is an organization
of owners of campground and recreational-vehicle parks and related
businesses.
Texas Association of Convention
and Visitor Bureaus
TACVB
Texas Association of Convention and Visitor Bureaus
is a state association comprised of Texas cities that promote conventions
and tourism to their areas.
Texas Building and Procurement
Commission
TBPC
The Texas Building and Procurement Commission
is a state agency that provides support services to the other agencies
and institutions of Texas state government. Formerly the General
Services Commission. The agency name changed effective September
1, 2001, as mandated by Senate Bill 311, 77th Legislature.
Purchasing Manual
Texas Commission on Environmental
Quality
TCEQ
The Texas Commission on Environmental Quality
is the state agency charged with protecting water and air resources
of the state. TCEQ also regulates hazardous material sites and is
responsible for the development of the State Implementation Plan.
TCEQ is the lead agency in hazardous material spill response. Emergencies
involving spillage, release, and/or abandonment of known or suspected toxic/hazardous
materials are the prime responsibility of TCEQ. Formerly known as
Texas Natural Resource Conservation Commission.
Texas Department of Health
TDH
Texas Department of Health’s Epidemiology Division
of the Bureau of Disease Control and Epidemiology provides oversight
of child passenger safety and older driver programs. Statewide emergency
medical services control and supervision comes under the Emergency
Management Division of TDH.
Traffic Safety
Texas Department of Insurance
list
TDI-list
The Texas Department of Insurance list lists all
companies authorized to conduct fidelity and surety business in
Texas.
Letting Manual
Texas Department of Transportation
TxDOT
A State agency responsible for planning, designing,
constructing, maintaining, and operating state transportation facilities
including roads, bridges, waterways, and airports.
Texas Eligible Bridge Selection
System
TEBSS
The Texas Eligible Bridge Selection System is
the system used as the basis for selection of Priority 1 bridge
projects on the federal‑aid Highway Bridge Replacement and Rehabilitation
Program. A TEBSS score between 0 and 100 is calculated for each
existing eligible bridge with 100 indicating the highest priority
and 0 representing the lowest.
Historic Bridge Manual
Texas Highway Designation File
THDF
A Texas Highway Designation File is a file containing
highway designation history back to September 1939, when the Transportation
Commission of that time approved the “General Redesignation of the
State Highway System.”
Texas Reference Marker (TRM) System User's
Manual
Texas Hotel/Motel Association
THMA
Texas Hotel/Motel Association is an organization
of businesses involved in providing overnight accommodations. THMA
works with TxDOT's Travel Division to publish the
Texas
Accommodations Guide
.Texas HYdraulic SYStem
THYSYS
- 1. The Texas HYdraulic SYStem is a system of computer routines and programs specifically aimed at highway drainage/analysis by department personnel. THYSYS comprises subsystems covering hydrology, open channels, culvert and bridge hydraulics, storm drains, and pump stations.
- 2. The Texas HYdraulic SYStem is a package of engineering programs providing analysis of streams, water runoff and flow across the entire state of Texas. This information is needed before bridge design can begin for any sizable bridge.
Texas Identification Number
TIN
The Texas Identification Number is a 14-digit
number issued from the Comptroller of Public Accounts to vendors
and contractors for the purpose of receiving payment from the State
of Texas. Each number consists of 11 digits plus a 3 digit mail
code, making a complete number of 14 digits.
Contract Management Manual
Texas Industries for the Blind
and Handicapped
TIBH
TIBH serves as the Central Nonprofit Agency for
coordinating and managing the State Use Program.
Contract Management Manual
Texas Mobile Load Simulator
TxMLS
A Texas mobile simulator is a mobile testing device
capable of accelerated simulation of real traffic loading on any
selected pavement section.
Pavement Management Information System Users
Manual
Texas Parks and Wildlife Department
TPWD
The Texas Parks and Wildlife Department is the
state agency with primary responsibility for protecting the state’s
parks, fish, and wildlife resources.
Texas Reference Marker System
TRM
The Texas Reference Marker (TRM) System is an
automated system that documents the past, present and future state-maintained
highway network within a database. The database contains:
- mileage for every segment of the highway network
- all secondary designations of any roadway segment
- administrative responsibilities of any roadway segment
- any classifications assigned by federal or state authorities
- configuration of all roadbeds for each route.
- Physical properties of each highway and roadbed, including dimensions and materials.
Texas Reference Marker (TRM) System User's
Manual
Texas Review and Comment System
TRACS
The Texas Review and Comment System is the state's
intergovernmental review system established to provide an opportunity
for state agencies, councils of governments and local governments
to find out about and comment, if they wish, on grant applications,
state and federal projects, and environmental assessments and impact
statements before they are funded or approved. TRACS serves as an
information exchange system, as a mechanism for improving grant
applications, as a method for determining consistency with regional
plans and to avoid duplication of efforts.
Public Transportation Collection
Texas Transportation Code
The Texas Transportation Commission is a record
of laws passed by the Texas legislature specific to transportation.
Contract Management Manual
Texas Transportation Commission
TTC
The Texas Transportation Commission is the five-member
board that governs the Texas Department of Transportation, which
is headed by an executive director selected by the commission. The governor,
with the advice and consent of the Texas Senate, appoints commission
members, who serve overlapping six-year terms.
Texas Transportation Plan
TTP
The Texas Transportation Plan is a policy document
adopted by the Texas Transportation Commission as the official statewide,
intermodal transportation plan. Also known as the Statewide Transportation
Plan.
Texas Travel Industry Association
TTIA
Texas Travel Industry Association is a nonprofit
organization representing attractions, airlines, hotels, restaurants,
convention and visitor bureaus, chambers of commerce, and other
groups interested in the development of travel and tourism as a
major economic force in Texas.
Texas Unified Certification Program
TUCP
The Texas Unified Certification Program is the
“one stop” certification process for the federal disadvantaged business
enterprise (DBE) programs in Texas. The TUCP consolidates all DBE
firms certified by six different agencies for U.S. DOT funded contracts
into one centralized DBE directory.
Public Transportation Collection
THD cone penetrometer test
A THD cone penetrometer test is a standard test
to determine the relative density or consistency and load carrying
capacity of the foundation materials encountered in bridge foundation
exploration work.
thermistor
A thermistor is a sensor used to measure temperature.
The electrical resistance of the thermistor varies with its temperature.
The thermistor is usually a composite material containing metallic oxides.
The resistance change is not generally as stable with time as the
resistance temperature detector (RTD) sensors.
Manual of Testing Procedures
thermocouple
A thermocouple is a sensor used to measure temperature.
Thermocouples are made by twisting or welding two wires of different
metals together. When used correctly, a voltage is generated that
varies with the temperature at the junction of the two wires. The
voltage change is not quite linear with temperature but is predictable
and stable. Many different types of thermocouples are in common use.
Manual of Testing Procedures
thermometer
A thermometer is a device for measuring temperature.
Manual of Testing Procedures
thermoplastic
Thermoplastic is a substance whose viscosity is
changed as a result of changing the temperature of the substance.
Asphalt is a thermoplastic because it becomes less viscous when
heated and its viscosity increases as the asphalt cools.
thickness design
A thickness design is a design procedure which
will produce pavements of such thickness as to adequately support
the design loads in an economical means.
thin hot-mix overlay
Thin hot-mix overlay is similar to conventional
overlays except the thickness is 1.5 inch or less.
Maintenance Collection
third party accidents
For worker's compensation purposes, a third party
accident is one that involves one or more TxDOT employee and someone
who is not a department employee, and may or may not damage department
property.
Occupational Safety Manual
threading
Threading is the process of installing a slightly
smaller pipe or arch within a failing drainage structure.
threat analysis
Threat analysis is the examination of all actions
and events that might adversely affect a system or operation..Source:
Information
Security Manual
threatened species
A threatened species is any species which is likely
to become an endangered species within the foreseeable future throughout
all or a significant portion of its range.
Environmental Manual
three-tiered architecture
Three-tiered architecture is a technological hardware
and software configuration in which the presentation, application
and database components of the architecture are resident on separate
and distinct systems within the configuration.
tie bar
Tie b is a deformed steel bar or connector embedded
across a joint in a rigid slab to prevent separation of abutting
slabs.
Pavement Design Manual
Tier Level
Tier Level is an assignment for each TxDOT district
to either Tier 1 or Tier 2 status on the basis of their percentage
of the total Statewide construction volume. Tier 1 is comprised
of those Districts whose three year projected construction spending
is equal to or greater than 5% of the Statewide total. A reduction
in a District’s portion of the statewide construction program below
the 5% level will not necessarily result in a decrease in the District
approval ceiling. Conversely, an increase in a District’s portion
above 5% could result in an increase in the approval ceiling. The
monetary approval ceiling for Tier 1 Districts is $100,000 and for
Tier 2 Districts is $35,000. These approval levels allow for approximately
50% of all adjustments in each tier to be candidates for District
approval.
time charges
Time charges are the number of days elapsed from
the effective date of the contract and charged against the completion
of contract work.
Contract Management Manual
time of concentration
The time of concentration is the time required
for water to flow from the most distant point of drainage area to
the point under consideration.
time worked
Time worked is any period equal to or greater
than 15 minutes duration in which work has been performed by an
employee with or without the employer's instruction, knowledge,
or consent, and which is intended to benefit the employer. Time
worked generally includes any time spent on behalf of the employer
that precludes the employee from acting in the employee’s own behalf.
It may include, but is not limited to, such activities as: attendance
at lectures, meetings, and training programs; traveling to and from
a designated headquarters to a training or work location; representing
the employer at any function; performing any work for the benefit
of the employer regardless of when or where this work is performed
including, but not limited to working late or working during lunch.
Human Resources Manual
“Timentry” subsystem
The “timentry” system is TxDOT’s method of recording
hours to be paid an employee for a particular pay period.
tire piece
Tire piece is a particle of a scrap tire or scrap
tire piece that has split, quartered, or shredded to a usable size
such as two-inch minus, or other size required by an industry user
or recycler.
Equipment Manual
T-List
See
.
toe drain
A toe drain is a sub-drain installed near the
downstream toe of a dam or levee to intercept seepage.
toe of slope
The toe of slope is the lowest part of an embankment
slope. It is the point at which the front of a slope intersects
with natural ground line.
Survey Manual
token ring
A token ring is a combination of the ring topology
and the token passing protocol. A token ring moves data packets
in a specific, predefined order on a LAN.
Source:
Information Security Manual
toll lane
A toll lane is a lane for use of which a toll,
or fare, is collected from users. The toll may be collected 24
hours each day or during peak traffic periods only. A toll lane
may also be used in conjunction with an HOV lane to allow motorists
not meeting the HOV passenger requirements to pay a toll to use
the dedicated lane. This is typically referred to as a HOT lane.
toll road
A toll road is a highway open to traffic only
upon payment of a direct fee.
top of back slope
The top of back slope is the point where back
slope interests with natural ground line.
top of cap
The top of cap is the top of the abutment/bent
on which the longitudinal span beams are placed.
topography
Topo
Topography is the details of a surface, including
natural and man-made structures, on a map or chart.
Survey Manual
tort claims
Tort claims (as referred to within the department)
are claims from actual or alleged property damages and injuries
or death to persons outside the department resulting from use of
state real property or actions of department employees which do
not directly involve motorized equipment.
Occupational Safety Manual
total immersion thermometer
A total immersion thermometer is a liquid-in-glass
thermometer that indicates correctly when the bulb and all but 6
to 12 mm (0.24 to 0.48 in.) of the liquid column in the stem is
immersed in the material being tested.
Manual of Testing Procedures
total quality management
TQM
TxDOT’s total quality management initiative is
known as Continuous Improvement Program, CIP.
total users
Total users are the group of users within a business
processing environment that are expected to request processing services
from the environment, but not all at the same point in time. The
size of this group is generally greater than that of the concurrent
users group but theoretically can be equal to this group.
Tour Texas 2000
TOURTEX 2000
Tour Texas 2000 is the Travel Division’s electronic
travel information system. TOURTEX 2000 is a cooperative effort
between the department and the travel industry. It contains travel
information from convention and visitor bureaus, chambers of commerce,
statewide associations and other members of the travel industry,
TOURTEX 2000 can be accessed via computer and modem internationally.
tracings
Tracings is the term given the original set of
plans developed by the designer for a given project. All reproductions
are made from the original tracings.
trademark
A trademark is a word, phrase, symbol, or design
that identifies and distinguishes the source of goods of one party
from another. An example is the TxDOT logo.
Legal Manual
traffic-actuated signal
A traffic-actuated signal is a type of signal
control in which the intervals vary according to the demands of
traffic as registered by detectors or push buttons.
traffic assignment
Traffic assignment is the procedure by which the
volume of travel on each individual component of the transportation
system is estimated.
Traffic Data and Analysis Manual
traffic control device
A traffic control device is any sign, signal,
marking, or installation placed or erected under public authority,
for the purpose of regulating, warning, or guiding traffic.
traffic control plan
TCP
The traffic control plan is all documents pertinent
to the proposed efficient, effective, and safe travel of the public
through work zones. Such documents include plan sheets, general
notes, specifications, special specifications, special provisions,
and quantities.
traffic death rate
The traffic death rate is the number of motor
vehicle deaths per hundred million vehicle miles traveled (VMT).
Traffic Safety
traffic equivalence factor
Traffic equivalence factor (e) is a numerical
factor that expresses the relationship of a given axle load to another
axle load in terms of its effect on the serviceability of a pavement
structure.
Pavement Design Manual
traffic island
A traffic island is the area between traffic lanes
for control of vehicle movements. A median or an outer separation
within an intersection is considered an island.
traffic lane
Traffic lane is the strip of roadway intended
to accommodate the forward movement of a single line of vehicles.
Pavement Design Manual
traffic marking
A traffic marking is the traffic control device
consisting of lines, words, symbols, patterns, or colors on pavement,
curbs, or other objects within or adjacent to the roadway.
Traffic Operations Division
TRF
The Traffic Operations Division oversees programs
in traffic engineering, traffic safety, railroad crossing and signals,
and traffic management.
Inside TxDOT
traffic serial zones
TSZ
Traffic serial zones are small geographic units
of area that are developed as the basis for estimation of travel.
Zones may vary in size and are determined by the roadway network
and homogeneity of development.
Traffic Data and Analysis Manual
traffic signal
A traffic signal is a power-operated traffic control
device by which traffic is regulated, warned or alternately directed
to take specific actions.
traffic signal controller
A traffic signal controller is a controller unit
only.
Manual of Testing Procedures
traffic signal controller assembly
A traffic signal controller assembly is made up
of a controller cabinet, controller, conflict monitor, and all auxiliary
equipment which constitutes a complete operating assembly.
Manual of Testing Procedures
Training, Quality and Development
Division (former)
TQD
The Training, Quality and Development Division
includes the Training and Development Section from the Human Resources
Division, the Professional Development Office and the Continuous Improvement
Office. In March of 1998, TQD became a section of the Human Resources
Division.
training resources
A generic term that includes instructor-led classes,
and training aids such as videos, instructional materials, technical
publications and audio/visual equipment.
Public Transportation Collection
transaction
A transaction is an accounting action that reflects
the occurrence of an economic event.
Finance Division
transaction volume
Transaction volume is a measure of the number
of processing requests that a computer system will receive and respond
to within a specified period of time.
transferred RAP
Transferred recycled asphalt pavement is department-owned
recycled asphalt pavement transferred to another governmental entity.
Materials And Supplies Management System Manual
transformer
A transformer is an electrical device that changes
one AC voltage to another. Utility companies generate and distribute
power at voltages usually greater than 12,500 VAC. Transformers
reduce the voltage to a safe and easily applied level, 120 VAC for
typical receptacles.
Highway Illumination Manual
transformer base
A transformer base is a hollow cast aluminum base,
the bottom of which is bolted to a concrete foundation and to the
top of which the bottom flange of the pole is bolted.
Highway Illumination Manual
TransGuide
TransGuide is San Antonio’s intelligent transportation
system.
transit agency
A transit agency is a recipient/subrecipient of
Federal Transit Administration or TxDOT funding to provide general
public transportation services or services to the elderly or persons
with disabilities. The term includes metropolitan transit authorities.
Grants Management Manual
transit authority
See metropolitan transit authority.
Public Transportation Collection
transit cooperative research program
TCRP
The transit cooperative research program is a
national program of transit-related research administered by the
Transportation Research Board.
Research and Implementation Manual
Transit Development Plan
TDP
A Transit Development Plan is a three-year plan
to ensure continuous transit service within a district. It includes
an inventory of current resources, a process for identifying gaps
or duplicative service, and a plan of action for the Section 5310
and JARC project selection processes. The TDP lists specific projects
to implement the plan.
Grants Management Manual
TransLink
TransLink is Texas Transportation Institute’s
multimodal public\private research library.
transmission control protocol/Internet
protocol
TCP/IP
Transmission control protocol/Internet protocol
are the protocols developed by the U.S. Department of Defense’s
Defense Advanced Research Projects Agency (DARPA) to enable communications
between different types of computers and computer networks. The
Internet protocol is a connectionless protocol which provides packet
routing. Transmission control protocol is connection-oriented and
provides reliable communication.
Information Security Manual
transportation brokerage
A transportation brokerage is a form of transportation
coordination in which the overall management of the system is consolidated,
but not necessarily the vehicle fleets.
Public Transportation Collection
transportation control measure
TCM
- A TCM is a means to control and improve traffic flow. TCMs are typically used to reduce mobile emissions of air pollution. Examples of TCMs include: �congestion pricing, �high occupancy vehicle (HOV) lanes; �high occupancy/toll (HOT) lanes; park-and-ride facilities; bicycle facilities; signal synchronization; and, �Intelligent Transportation Systems (ITS).
- A transportation control measure is a measure used for the purpose of reducing emissions or concentrations of air pollutants from transportation sources by reducing vehicle use or changing traffic flow or congestion conditions. Vehicle technology-based, fuel-based, and maintenance-based measures that control emissions from vehicles under fixed traffic conditions are not considered TCMs.Transportation Planning and Programming Collection
transportation coordinator
A transportation coordinator’s primary concern
is to meet customer trip needs and manage the logistics of travel,
rather than operating a particular service or set of services. The
term includes both the people and automated equipment to accomplish
this task. The term is synonymous with mobility manager.
Public Transportation Collection
transportation demand management
TDM
Actions or programs which encourage people to
travel at alternative times, or with fewer vehicles to reduce congestion.
TDM reduces traffic volumes through methods including: ridesharing,
park-and-ride operations, staggered work hours, and transit improvements.
transportation enhancement
TE
A transportation enhancement is a program provided
for under the Transportation Equity Act for the 21st Century (TEA-21)
to address projects that contribute to the livelihood of communities,
the quality of our environment and the aesthetics of our roadways.
These projects are funded through the Surface Transportation Program
(STP), administered by TxDOT for the FHWA. Projects undertaken
with enhancement funds are eligible for reimbursement of up to 80%
of allowable costs, which may include P.S.&E., environmental
mitigation, acquisition of property, construction and interpretation,
or other activities to enhance the appreciation of natural or cultural
resources.
Historic Bridge Manual
Transportation Equity Act for
the 21st Century
TEA-21
The Transportation Equity Act for the 21st Century
is the transportation act passed by congress in 1998 that provides
another six-year authorization (1998-2003) and policy for highways,
safety, transit, and other surface transportation programs. TEA-21
builds on the initiatives established in ISTEA.
Transportation Planning and Programming Collection
Transportation Electronic Award
Management
TEAM
The Transportation Electronic Award Management
is the Federal Transit Administration’s electronic project and financial
management system.
Public Transportation Collection
Transportation Improvement Plan
TIP
- The TIP is a current plus three-year prioritized program of transportation projects covering a metropolitan planning area which is consistent with the metropolitan transportation plan. This program is required for a locality to receive federal transit and highway funding and is a constrained financial program.
- The Transportation Improvement Program is a staged, multi-year, intermodal program of transportation projects covering a metropolitan planning area that is consistent with the metropolitan transportation plan.Transportation Planning and Programming Collection
transportation management area
TMA
- A TMA is a metropolitan area with a population 200,000 or greater. Within Texas nine of the 25 MPOs are currently TMAs; these include: Austin, Corpus Christi, Dallas-Ft. Worth, El Paso, Hidalgo County, Houston-Galveston, Jefferson-Orange-Hardin Counties, Lubbock, and San Antonio.Public Transportation Collection
- A transportation management area is an urbanized area of over 200,000 population, as determined by the latest decennial census. The TMA designation applies to the entire metropolitan planning area served by a MPO(s) within which the TMA is located.Transportation Planning and Programming Collection
Transportation Planning and Development
(former SMT)
TPD
- Transportation Planning and Development is one of TxDOT’s seven functional areas. It’s fundamental function is to form the vision, map the direction, and design the methodology for selecting and developing projects that fulfill the public demand for transportation. It has oversight of the following divisions: Transportation Planning and Programming, Environmental Affairs, Right of Way, and Design. TPD also has oversight of the International Relations Office.
- Transportation Planning and Development is the section of a district office responsible for overseeing project planning and development functions, including metropolitan planning organization (MPO) planning activities.Grants Management Manual
Transportation Planning and Programming
Division
TPP
The Transportation Planning and Programming Division
administers planning funds, collects data on the highway system
and programs projects. In March of 1998, International Relations
became of a section of TPP.
Inside TxDOT
transportation supply management
TSM
TSM consists of all the actions that may improve
transportation performance or LOS by changing the physical or operating
characteristics of the traveled route and associated facilities
in order to handle transportation demand. These actions include
traffic control (e.g., signalization, ramp metering, channelization),
providing/improving intermodal transfer facilities (e.g., terminals),
automated toll collections, and joint use of right of way.
Transportation System Management
TSM
Transportation System Management is a program
to reduce congestion and improve traffic flow through traffic signal
synchronization, freeway operations improvements (e.g., changeable
message signs and ramp metering), incident management (clearing
accidents and breakdowns quickly), and other methods.
transporter
Transporter is a person who transports used oil
filters to a location for storage, processing, recycling, or disposal.
Equipment Manual
TransStar
TransStar is Houston’s intelligent transportation
system.
transverse cracking
Transverse cracking is an asphaltic concrete pavement
(ACP) distress type in which cracks or breaks run approximately
perpendicular to the pavement centerline. Transverse cracking ranges from
0 to 99 per station.
Pavement Management Information System (PMIS)
Rater's Manual
transverse joint
A transverse joint is a joint formed at right
angles to the direction of traffic.
traprock
Traprock consists of various fine-grained, dense,
dark colored igneous rocks, typically basalt or diabase; also called
“trap.” NOTE: This definition has been approved by the Specification Committee.
Manual of Testing Procedures
Traser
Traser is a computer program used by local engineering
and law enforcement agencies to isolate problem areas in a jurisdiction.
Traser is used as the name of a software program developed by the Texas
Transportation Institute for microcomputer traffic crash and citation
data.
Travel and Tourism Research Association
TTRA
The Travel and Tourism Research Association is
an international organization of travel research and marketing professionals
devoted to improving the quality and scope of travel and tourism research
and marketing information.
travel coordinator
A travel coordinator is an employee assigned the
responsibility of assisting travelers with all aspects of travel.
The travel coordinator acts as liaison to the Travel Aid and Payment
Unit of Budget and Finance Division.
Travel Manual
Travel Division
TRV
The Travel Division (formerly the Travel and Information
Division) supports tourism by running travel information centers
and publishing travel literature.
Inside TxDOT
traveled way
Traveled way is the portion of the roadway for
the movement of vehicles, exclusive of shoulders and auxiliary lanes.
Right of Way Collection
travel expense
Travel expense means a transportation, meal, lodging,
or incidental expense.
Travel Manual
travel expense account
Travel expense account is the or
the completed form that TxDOT employees use to submit travel expenses
for reimbursement.
Travel Manual
Travel Industry Association of
America
TIA
The Travel Industry Association of America is
a national nonprofit organization uniting all components of the
diverse U.S. travel industry.
Travel Information Center
TIC
TxDOT’s Travel Division operates and maintains
12 Travel Information Centers staffed by uniformed, professional
travel counselors who provide information and materials to visitors.
Travel Information Data Exchange
TIDE
Travel Information Data Exchange is part of Travel
Division’s travel literature fulfillment program. TIDE is an electronic
bulletin board for the automated transfer of names and addresses
of persons requesting travel/tourism information from a magazine
reader service card.
Travel Requester’s Address Exchange
TRAX
Travel Requester’s Address Exchange is an electronic
bulletin board providing access to names and addresses of persons
who have requested Texas travel/tourism information. TRAX data is
available to the Texas travel industry as a free public service
of TxDOT.
travel voucher
Travel voucher is the accounting document used
to seek reimbursement for travel expenses. This document is used
for coordinating with the comptroller.
Travel Manual
traversable median
See
.
traverse sheet
Traverse sheet is a form generally used in calculating
unknown sides, determining areas and verifying accuracy of a survey.
Right of Way Collection
treated RAP
Treated recycled asphalt pavement is cold-mixed
with asphalt, oil, emulsion, rejuvenator, etc., stockpiled and ready
for use.
Materials And Supplies Management System Manual
trial de novo
A trial de novo is a trial in a higher court in
which all the issues of fact or law tried in a lower court are reconsidered
as if no previous trial had taken place.
Right of Way Manual
triangulation station
A triangulation station is a permanent horizontal
control monument. It is a point on the Earth where the position
is determined by triangulation.
GPS User’s Manual
triaxial classification system
A triaxial classification system is a soil strength
classification system based upon shear strength of soils triaxially
loaded.
triaxial compression test
The triaxial compression test is a test in which
a cylindrical specimen of soil or rock encased in an impervious
membrane is subjected to a confining pressure and then loaded axially
to failure in compression.
Manual of Testing Procedures
triaxial test
- A triaxial test method of determining the stress-strain characteristics of cohesive soils or materials in which the sample is subjected to a constant lateral pressure while the vertical pressure is increased.
- The triaxial test is one in which stresses are measured in three mutually perpendicular directions.Manual of Testing Procedures
tridem axle load
See
.
Pavement Design Manual
triennial review
A triennial review is an examination every three
years of a Section 5307 transit agency’s records, policies, and
procedures by the Federal Transit Administration.
Public Transportation Collection
trip balancing
Trip balancing is the procedure used to balance
the number of trip productions in an area to the number of trip
attractions or vice versa. Each trip that is produced within an
area must have an attraction.
Traffic Data and Analysis Manual
trip distribution
Trip distribution is the process by which the
trip interchange volumes between zones are estimated.
Traffic Data and Analysis Manual
trip generation
Trip generation is the procedure by which estimates
of the number of trips produced and attracted by the zone within
an urban area are developed.
Traffic Data and Analysis Manual
triple (tridem) axle load
triple (tridem) axle load is the total load transmitted
to the road by three consecutive axles extending across the full
width of the vehicle. (
Note:
There were no
tridem axles at the AASHTO Road Test; however, the spacing that
may be inferred for consecutive triple axles based on the tandem axle
spacings is 48 inches.) Pavement Design Manual
trip length
Trip length is the length of a trip measured in
distance or in time.
Traffic Data and Analysis Manual
Trip length frequency distribution
Trip length frequency distribution is XXXX
Traffic Data and Analysis Manual
trip purpose
Trip Purpose is the purpose of a trip. Generally,
four trip purposes are used; home based work (HBW), home based non-work
(HBNW), non-home based (NHB), and truck/taxi. Home based work trips
are trips that begin at home and end at work or begin at work and
end at home. Home based non-work trips are those trips that begin
or end at home and the purpose of the trip is to go to a place other
than work such as school, shopping center, or doctor’s office. Non-home
based trips are those trips that do not begin or end at home. Truck
and taxi trips are those made by either a commercial vehicle or
a commercial passenger carrier other than general public transportation providers.
Traffic Data and Analysis Manual
Trivial File Transport Protocol
TFTP
A trivial file transport protocol is one that
is used to transfer files.
Information Technology and Services Manual
Trojan horse
A Trojan horse is a destructive program. These
programs are usually viruses or worms that are hidden in an attractive
or innocent-looking piece of software, such as a game or graphics
program. Victims may receive a Trojan horse program by e-mail or
on a diskette, often from another unknowing victim, or may be urged
to download a file from a Web site or bulletin board.
Information Security Manual
tunneling
Tunneling is a method for circumventing a firewall
by hiding a message that would be rejected by the firewall inside
a second, acceptable message.
Source: Information Security Manual
turnaround
A turnaround is roadway that connects from one
frontage road to another under a grade separation structure.
turning lane
A turning lane is a lane reserved for turning
vehicles.
turning movement
Turning movement is the traffic making a designated
turn at an intersection.
turning roadway
A turning roadway is connecting roadway for traffic
turning between two intersection legs.
two-step negotiation process
Two-step negotiation process is a procurement
method in which selection of a contractor is made on a basis other
than cost (step one), and after selection is made, the cost is determined
(step two).
Contract Management Manual
two-tiered architecture
Two-tiered architecture is a technological hardware
and software configuration in which the presentation and application
components of the architecture are resident on one system in a two-system
configuration and the database component is resident on the other
system in the configuration.
Tyler District
TYL
The Tyler District is a TxDOT district office
including the following counties: Anderson, Cherokee, Gregg, Henderson,
Rusk, Smith, Van Zandt, Wood. Area offices are located in Athens, Jacksonville,
Longview, Mineola, Palestine and Tyler. Maintenance offices are
in Athens, Canton, Jacksonville, Rusk, Henderson, Longview, Mineola,
Quitman, and North and South Tyler.
Inside TxDOT
typical homesite determination
Typical homesite determination is that amount
of land which is considered "normally typical" for residential use
in a specific area.
typical section(s)
Typical section(s) show usual roadway (or bridge)
cross sectional features including lane and shoulder widths; limits
of surfacing; pavement structure data including subgrade treatment
type and depth, base course(s) thickness(es) and type of surfacing
material; travel lane and shoulder cross slopes; side slope rates
for cut and fill sections; ditch or storm sewer location and depth;
typical right-of-way limits; profile grade line location; typical
traffic barrier location median width and slopes; and curb location
and geometry.