Highways
Denver is primarily served by the interstate highways I-25 and I-70. The intersection of the two interstates is referred to locally as "the mousetrap", because when airborne, the junction (and subsequent vehicles) resemble mice in a large trap. I-70 runs east-west from Utah to Maryland. I-25 runs north-south from New Mexico through Denver to Wyoming. I-225 traverses neighboring Aurora and connects with I-25 in the southeastern corner of Denver. Additionally, I-76 begins from I-70 just west of the city in Arvada. It intersects I-25 north of the city and runs northeast to Nebraska where it ends at I-80. Denver also has a nearly complete beltway known as "the 470's". These are C-470, a limited access state highway in the southwest Metro area, and two toll highways, E-470 (from southeast to northeast) and Northwest Parkway (from terminus of E-470 to US 36). Highway 6 follows the alignment of 6th Avenue west of I-25, and connects downtown Denver to the west-central suburbs of Golden and Lakewood.
A highway expansion and transit project for the southern I-25 corridor, dubbed T-REX (TRansportation EXpansion project), was completed on November 17, 2006. The project installed wider and additional highway lanes, and improved highway access and drainage. The project also includes a light rail line that traverses from downtown to the south end of the metro area at Lincoln Avenue . The project spanned almost 19 miles along the highway with an additional line traveling parallel to part of I-225
(Source: Wikipedia.org)
