Science Fair Project Encyclopedia
U.S. Highway 91
United States Highway 91 is a north-south United States highway. A long-haul route until the mid-1970s, it has now been largely decommissioned in favor of Interstate 15 -- in fact, half of its remaining 120 mile (193 km) length is within a short distance of the Interstate.
As of 2004, the highway's northern terminus is in Idaho Falls, Idaho at an intersection with U.S. Highway 26 (and Business Interstate 15). Its southern terminus is in Brigham City, Utah at an intersection with Interstate 15, after spending 10 miles multiplexed with U.S. Highway 89.
The highway passes through the following states:
- Montana (until 1973)
- Arizona (10 miles (16 km) in the northwest corner, until 1974)
- Nevada (until 1974)
- California (until 1973)
Related US Routes
- U.S. Highway 191
- There has never been a US Highway 291 or 391
- U.S. Highway 491
- List of U.S. Highways
Sources and external links
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