History of Interstates and U.S. Highways in Utah
Utah’s highway system is essential for connecting the state’s mountainous regions and desert landscapes with neighboring states. Early highways such as U.S. 40 and U.S. 89 played a critical role in developing Utah’s infrastructure, linking rural areas to Salt Lake City and beyond. The construction of the Interstate Highway System introduced major Interstates like I-15 and I-70, which continue to serve as key routes for freight and passenger travel.
Utah’s highways are vital for the state’s growing economy, especially in supporting industries such as tourism, mining, and technology. I-15, which runs north-south, is one of the most important corridors in the state, connecting Utah to both Nevada and Idaho. I-80 provides an east-west link, facilitating trade and travel between California and the Midwest. Additionally, highways like U.S. 89 offer scenic routes through Utah’s national parks and recreational areas, making them popular among tourists.
Utah continues to improve its highway infrastructure to accommodate increasing traffic, particularly in urban areas like Salt Lake City. Ongoing projects focus on expanding capacity, upgrading interchanges, and improving safety. Major efforts have been made to widen sections of I-15 and I-80 to handle the state’s growing population and commercial demands.
Busiest and Longest Federal Interstates and U.S. Highways in Utah
| Interstate or Highway | Length (mi) | Length (km) | Southern or Western Terminus | Northern or Eastern Terminus | Created |
|---|---|---|---|---|---|
| I-15 | 400 | 644 | Arizona Border | Idaho Border | 1957 |
| I-70 | 232 | 373 | Nevada Border | I-15 Junction | 1957 |
| I-80 | 196 | 315 | Nevada Border | Wyoming Border | 1957 |
| I-84 | 119 | 192 | Ogden, UT | Idaho Border | 1957 |
| U.S. 89 | 502 | 808 | Arizona Border | Idaho Border | 1926 |
| U.S. 40 | 171 | 275 | Colorado Border | Heber City, UT | 1926 |
| U.S. 191 | 403 | 649 | Arizona Border | Wyoming Border | 1926 |
| U.S. 6 | 379 | 610 | Nevada Border | Colorado Border | 1926 |
| U.S. 50 | 168 | 270 | Nevada Border | I-15 Junction | 1926 |
| U.S. 91 | 25 | 40 | Brigham City, UT | Idaho Border | 1926 |
Utah Designated Highways
Utah Interstate Highway 15, I-15 S
Utah Interstate Highway 70, I-70 E
Utah Interstate Highway 70, I-70 W
Utah Interstate Highway 80, I-80 E
Utah Interstate Highway 80, I-80 W
Utah Interstate Highway 84, I-84 E
Utah Interstate Highway 84, I-84 W
Utah Interstate Highway 215, I-215 E
Utah Interstate Highway 215, I-215 N
Utah Interstate Highway 215, I-215 S
Utah Interstate Highway 215, I-215 W
Utah US Highway 6, E Main St
Utah US Highway 6, S State Rd
Utah US Highway 6, State St
Utah US Highway 6, US-6
Utah US Highway 6, US-6 Bus
Utah US Highway 6, W Main St
Utah US Highway 40, E 6000 S
Utah US Highway 40, E Main St
Utah US Highway 40, S 1500 E
Utah US Highway 40, US-40
Utah US Highway 40, US-40 N
Utah US Highway 40, US-40 S
Utah US Highway 40, W Main St
Utah US Highway 50, E 500 N
Utah US Highway 50, E Main St
Utah US Highway 50, N 3200 W
Utah US Highway 50, N State St
Utah US Highway 50, S State St
Utah US Highway 50, US-50
Utah US Highway 50, W 400 N
Utah US Highway 50, W 500 N
Utah US Highway 50, W 1500 S
Utah US Highway 50, W Main St
Utah US Highway 89, 300 W
Utah US Highway 89, 400 S
Utah US Highway 89, Beck St
Utah US Highway 89, Center St
Utah US Highway 89, E 300 N
Utah US Highway 89, E 300 S
Utah US Highway 89, E 400 N
Utah US Highway 89, E 400 S
Utah US Highway 89, E 12300 S
Utah US Highway 89, E Center St
Utah US Highway 89, E Main St
Utah US Highway 89, E State Rd
Utah US Highway 89, E State St
Utah US Highway 89, Factory Outlet Dr
Utah US Highway 89, N 300 W
Utah US Highway 89, N 500 W
Utah US Highway 89, N 1600 W
Utah US Highway 89, N Bear Lake Blvd
Utah US Highway 89, N Harrisville Rd
Utah US Highway 89, N Main
Utah US Highway 89, N Main St
Utah US Highway 89, N West State Rd
Utah US Highway 89, New Hwy 89
Utah US Highway 89, S 100 E
Utah US Highway 89, S 300 W
Utah US Highway 89, S 500 W
Utah US Highway 89, S 1600 W
Utah US Highway 89, S Main St
Utah US Highway 89, S State St
Utah US Highway 89, State St
Utah US Highway 89, US-89
Utah US Highway 89, US-89 Alt
Utah US Highway 89, US-89 Conn
Utah US Highway 89, US-89 N
Utah US Highway 89, US-89 S
Utah US Highway 89, W 300 S
Utah US Highway 89, W 400 S
Utah US Highway 89, W 12300 S
Utah US Highway 89, W Center St
Utah US Highway 89, W Main St
Utah US Highway 89, W State Rd
Utah US Highway 89, W State St
Utah US Highway 89, Washington Blvd
Utah US Highway 91, N 200 W
Utah US Highway 91, N Main St
Utah US Highway 91, S 200 W
Utah US Highway 91, S Main St
Utah US Highway 91, US-91
Utah US Highway 91, W 5300 S
Utah US Highway 91, W Riverdale Rd
Utah US Highway 163, US-163
Utah US Highway 189, E Provo Canyon Rd
Utah US Highway 189, N Main St
Utah US Highway 189, N University Ave
Utah US Highway 189, S Main St
Utah US Highway 189, S University Ave
Utah US Highway 189, University Ave
Utah US Highway 189, US-189
Utah US Highway 189, US-189 N
Utah US Highway 189, US-189 S
Utah US Highway 191, E 200 N
Utah US Highway 191, E Center St
Utah US Highway 191, E Main St
Utah US Highway 191, N Carbon Ave
Utah US Highway 191, N Grayson Pkwy
Utah US Highway 191, N Main St
Utah US Highway 191, N Vernal Ave
Utah US Highway 191, S 100 W
Utah US Highway 191, S Main St
Utah US Highway 191, US-191
Utah US Highway 191, US-191 Bus
Utah US Highway 191, W 100 N
Utah US Highway 191, W Highway Dr
Utah US Highway 191, W Main St
Utah US Highway 491, E Center St
Utah US Highway 491, US-491