Overview
    Design Bid Build:
 TxDOT employs design
 bid
build project delivery method when
:- District designs the project in house or hires a consultant to design the PS&E.
 - Construction Division (CST) assists in letting the project to a contractor.
 - Contractor constructs project after approval from Texas Transportation Commission.
 
Design Build: Larger
 construction projects
where a single contractor is hired to both design and build the
project on an accelerated schedule.Comprehensive Development Agreements (CDAs) may also be 
used
 as
a form of design build project delivery. CDAs may include provisions
for a developer to operate and
 maintain the facility
upon completion of the project.As of 2021, Union Pacific Railroad will only enter
into PELOA and C&M agreement with TxDOT and not with the developer
of a design-build project.