Interstate 15 Descriptions

I-15 California:
North of its junction with the Riverside Freeway, State Route 91, in the Inland Empire near Corona, the route roughly follows the former routes of U.S...

I-15 Nevada:
Interstate 15 begins in Primm, continues through Las Vegas along the Las Vegas Strip corridor. Then the interstate crosses the border with Arizona in ...

I-15 Arizona:
I-15 just clips the northwestern corner of Arizona with a total length of 29.4 miles (47 km).[10] The stretch is separated from the rest of the state ...

I-15 Utah:
I-15 continues through Utah for just over 400 miles (640 km). It is the main north-south connection for the state. The highway approximately follows t...

I-15 Idaho:
I-15 passes through Idaho for nearly 200 miles (320 km). The highway runs through Pocatello, Blackfoot, and Idaho Falls. It also merges with Interstat...

I-15 Montana:
Interstate 15 continues onward through nearly 400 miles (640 km) of Montana through the cities of Butte, Helena and Great Falls, intersecting with Int...