Section 7: Traffic Survey Count Analysis
Count Data Processing
Vehicle and pedestrian count data must be tabulated and checked
against established traffic signal warrants. The vehicle data is
recorded on the Vehicle Volume Summary Sheet. The pedestrian data is
recorded on the Pedestrian Volume Summary Sheet.
The tabulation and checking can be accomplished manually or
by using an automated system.
Manual Method.
Manual tabulation is accomplished
by transferring the data to the Traffic Survey — Count Analysis
Form (discussed under the following subheading).Automated Methods.
Traffic count data
may be transferred into an automated system for tabulation and checking
against warrants. Districts may use commercially available software
for this purpose. Also available for use is a traffic signal warrant
excel worksheet developed by TxDOT personnel. A copy of this Excel
file can be provided by the Traffic Safety Division upon request.The Traffic Survey — Count Analysis Form
The Traffic Survey — Count Analysis Form is used to compare
the data from the traffic study with the accepted signal warrants.
The form shows the following information:
- location data (major and minor street, control and section, etc.)
- date of survey
- 85th percentile speed on major street
- accepted traffic signal warrants
- vehicle and pedestrian volumes for the eight highest,non-overlappinghours of the day, as determined from the vehicle and pedestrian counts.
This form shows both rural and urban warrants; therefore,
the warrants applied should be indicated on the form (See Appendix
A).