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.
Alberta Highway 40
Two interesting facts about highway 40 are: The segment from roughly Hinton to Grande Prairie is part of the shortest fully paved land route from the USA to the Klondike Gold fields in the Yukon, and if the segments of the Forestry Trunk Road and Highway 40 were connected, the total length would be approximately and it would be the second longest highway in Alberta.