List of Interstate Highways in Utah
The Interstate Highways in Utah are maintained by the Utah Department of Transportation (UDOT). The Interstate Highway System is a nationwide system with only a small portion of these routes entering Utah. Originally, the State Road Commission of Utah, created on March 23, 1909 was responsible for maintenance, but these duties were rolled into the new UDOT in 1975. There are of Interstates within the state. The longest is Interstate 15 (I-15) at and the shortest is I-215 at . One unique former route is Interstate 415, which was never signed as such, and was only used as a temporary designation for the eastern portion of what is now the Interstate 215 belt loop around Salt Lake City.
Hillclimbing in the United States
The hill climb with the longest road, that has been continuously run, in the world is the Mount Equinox Hill Climb located in Arlington, Vermont just outside Manchester. The length of the road is 5.2 miles and the elevation change is 3,100 feet. It contains more than 40 turns and cars have been clocked at breaking 100 MPH on the long straight ending at "The Saddle". The hill climb has been run by such famous drivers as Carroll Shelby, Briggs Cunningham, René Dreyfus, John Fitch and Miles Collier to name just a few. Started in 1950 as an official SCCA event, it continues uninterrupted, as a vintage car race. Since 1973 the sanctioning body has been the Vintage Sports Car Club of America.