The Transportation Expansion (T-REX) Project[1] was a $1.67 billion project aimed at improving transportation options for commuters in the Denver metro area within the areas of Interstate 25 and 225, which was recognized as the 14th busiest intersection in the United States at the time. The T-REX effort widened major interstates to up to 5 mainline lanes in each direction and added 19 miles (31 km) of double-track light rail throughout the metropolitan area (40 miles (64 km) total). The T-REX project finished 3.2% under its $1.67 billion budget and 22 months ahead of schedule in 2006.[2]
The T-REX project is one of the first transportation projects in the US to use a design-build contract in which the same contractor is responsible for the project's engineering and construction. Under this type of contract, the contracting agency provides a general concept of the plan, and the contractor is responsible for most of the details, many of which are worked out as the project proceeds.[3][4]
The T-REX corridor carries more than 280,000 vehicles per day and connects the two largest employment centers in the region: Downtown Denver and the Denver Tech Center.
- ^ "Fact Book 2003" (PDF). November 11, 2004. Archived from the original (PDF) on November 11, 2004. Retrieved May 26, 2023.
- ^ Metro Denver Development, Transportation Infrastructure, http://www.metrodenver.org/DataCenter/Infrastructure/
- ^ Carter and Bergess -Managing Mega-Projects: T-REX, http://www.c-b.com/information%20center/transportation/ic.asp?issue=4&p=1&tID=23&pID=87
- ^ On parallel tracks, http://americancityandcounty.com/features/government_parallel_tracks/