page_title: Speed limits in the United States by jurisdiction
section_title: Utah
hierarchical_section_title: Speed limits in the United States by jurisdiction / Utah
caption_attribution_description: English: Eighty Mile Per Hour speed limit sign in Juab County, Utah.
context_page_description: Speed limits in the United States vary depending on jurisdiction. Rural freeway speed limits of 70 to 80 mph are common in the Western United States, while such highways are typically posted at 65 to 70 mph in the Eastern United States. States may also set separate speed limits for trucks and night travel along with minimum speed limits. The highest speed limit in the country is 85 mph, which is posted on a single stretch of tollway in rural Texas. The lowest maximum speed limit in the country is 30 miles per hour in American Samoa.
context_section_description: In Utah, there is a minimum speed limit of 45 mph on Interstate Highways when conditions permit. The maximum speed limit on Interstates is normally 70 mph in cities and, on most highways, 80 mph elsewhere. UDOT has now implemented HB83, raising the speed limit to 80 mph on an additional 289 miles of rural interstate, including I-80 from Nevada to mile marker 99, I-84 from Idaho to I-15, and I-15 between St. George, Utah and Mona, Utah.
  Although 80 mph is posted on most interstates, some stretches of I-80 and I-84 are posted at 70 mph east of Salt Lake City. I-80 is briefly posted 65 mph/truck speed: 55 between US 40 and Wanship. Speeds between Salt Lake City and Park City on I-80 are variable based on road conditions.
  The speed limit from Ogden to Spanish Fork on I-15 is 70 mph. From Mona south until Cedar City, excluding curvy sections and mountain passes, the speed limit is 80 miles per hour. Excluding a rural break in Iron and Washington counties, the speed limit on I-15 in the urban areas of Washington and St. George is 70 miles per hour until the southern border of Arizona. The speed limit on I-15 in Cedar City is 75 miles per hour.
  The Legacy Parkway, running between North Salt Lake and Farmington, originally had a speed limit of 55 mph along its entire length due to environmental concerns at the time of its construction. In January 2020, upon expiration of the law requiring the 55 mph limit, it was raised to 65 mph.
caption: 80 miles per hour speed limit sign on Interstate 15 south of Nephi, Utah
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