 Interstate 25 | |
|---|---|
 | |
| Route information | |
| Length | 1,061.67 mi[1] (1,708.59 km) |
| Existed | 1957–present |
| NHS | Entire route |
| Major junctions | |
| South end |    I-10 / US 85 / US 180 in Las Cruces, NM |
| |
| North end |   I-90 / US 87 in Buffalo, WY |
| Location | |
| Country | United States |
| States | New Mexico, Colorado, Wyoming |
| Highway system | |
Interstate 25 (I-25), also known as the Pan-American Freeway, is a major Interstate Highway in the western United States. It is primarily a north–south highway, serving as the main route through New Mexico, Colorado, and Wyoming. I-25 stretches from I-10 at Las Cruces, New Mexico (approximately 25 miles [40 km] north of El Paso, Texas) to I-90 in Buffalo, Wyoming (approximately 60 miles [97 km] south of the Montana–Wyoming border).[2] It passes through or near Albuquerque, New Mexico; Pueblo, Colorado; Colorado Springs, Colorado; Denver, Colorado; Fort Collins, Colorado; and Cheyenne, Wyoming. The I-25 corridor is mainly rural, especially in Wyoming, excluding the Albuquerque metropolitan area and the Front Range urban corridor from Pueblo to Cheyenne.
The part of I-25 in Colorado passes just east of the Front Range of the Rocky Mountains. That stretch was involved in a large-scale renovation named the Transportation Expansion (T-REX) Project[3] in Denver and the Colorado Springs Metropolitan Interstate Expansion (COSMIX).[4] These projects, and others in New Mexico, were necessary because these stretches of I-25 were originally inadequately designed and constructed (the pavement was deteriorating rapidly) and also because urban areas, like Albuquerque, Colorado Springs, and Denver, had tripled and quadrupled in population much earlier than anyone had anticipated back in the 1950s and 1960s. Major highway work for the T-REX project ended on August 22, 2006. The COSMIX project was completed in December 2007. Several other smaller improvement projects for I-25 are still ongoing within New Mexico and Colorado.
- ^ Starks, Edward (January 27, 2022). "Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. Archived from the original on September 20, 2023. Retrieved August 6, 2023.
- ^ "Overview Map of I-25" (Map). Google Maps. Retrieved February 15, 2008.
- ^ "T-REX Fashion & Clothing Project |". Archived from the original on May 2, 2014. Retrieved July 2, 2005.
- ^ "COSMIX Project Home Page". Cosmixproject.com. Archived from the original on January 14, 2010. Retrieved November 27, 2011.