High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! The Transportation Expansion Project or T-REX was a $1.67 billion venture that had a goal of transforming the way people in the metro Denver area commute within the areas of Interstates 25 and 225, then the country's 14th busiest intersection. The T-REX effort widened major interstates to as much as 7 wide in each direction and added 19 miles (31 km) of double-track light rail throughout the metropolitan area (40 miles total). It's considered by some to be one of the most successful transportation upgrade projects in the United States. The T-REX project finished 3.2% under its $1.67B budget and 22 months ahead of schedule in 2006 and is considered to be an example of inter-governmental agency cooperation for transportation projects for North America and Worldwide. Stakeholders have been recognized nationally and internationally for its success, including quality management.