Salt Lake and Farmington, originally had a speed limit of 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 . 80 mph speed limit On April 3, 2013, Utah Department of Transportation spokesman John Gleason said "We’d only do it in a situation that would make sense: flat, straight roadways. The Utah Department of Transportation is looking at expanding zones where it can increase the speed limit from 75 to 80 miles per hour. The Utah State Legislature recently approved a bill allowing for a series of zones to become permanent, as well as expanding them in other places around the state. UDOT began a study on Monday (April 1, 2013) to place more zones on rural parts of I-15, I-80 and I-84. The areas under consideration, UDOT spokesman said, are on I-80 from Grantsville (exit 99) to Wendover, on the Utah-Nevada border; I-84 from Tremonton to the Utah-Idaho border; I-15 from Brigham City (North interchange) to the Utah-Idaho border; and I-15 from Santaquin to North Leeds." The speed limit on these sections has been increased from 80 mph as of September 17, 2013. On February 13, 2014, UDOT voted to increase the speed limit on I-80 from Salt Lake City across the Bonneville Salt Flats to the Nevada border to . The change went into effect on July 1, 2014. By July 1, 2014, the state raised the speed limit on all rural interstates in Utah to 80 mph except I-80 from the Wyoming border to Salt Lake City, on I-84 from its junction with I-80 to Ogden and on twisty sections of Interstate 70 from its I-15 junction to the Colorado border (the speed limit on I-70 still varies between 60 mph and 80 mph depending on the topography of the section of freeway.). The speed limit on every other highway is 55 mph unless otherwise posted, although several two-lane, undivided roads have 65 mph speed limits, with divided sections of U.S. Route 40 and U.S. Route 189 posted at 65 mph as well. By the end of 2016, UDOT raised speed limits to 80 mph on additional sections of I-15 and I-70. Vermont The standard speed limit in Vermont stands at . This is applied to rural two-lane roads. On urban freeways, divided at-grade expressways,