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.
Pennsylvania
The Pennsylvania Department of Transportation, abbreviated as PennDOT, owns of the of roadway in the state, making it the fifth-largest state highway system in the United States. The Pennsylvania Turnpike system is long, with the mainline portion stretching from Ohio to Philadelphia and New Jersey. It is overseen by the Pennsylvania Turnpike Commission. Another major east–west route is Interstate 80, which runs primarily in the northern tier of the state from Ohio to New Jersey at the Delaware Water Gap. Interstate 90 travels the relatively short distance between Ohio and New York through Erie County, in the extreme northwestern part of the state.
Primary north–south highways are Interstate 79 from its terminus in Erie through Pittsburgh to West Virginia, Interstate 81 from New York through Scranton, Lackawanna County and Harrisburg to Maryland and Interstate 476, which begins north of the Delaware border, in Chester, Delaware County and travels to Clarks Summit, Lackawanna County, where it joins I-81. All but of I-476 is the Northeast Extension of the Pennsylvania Turnpike, while the highway south of the main line of the Pennsylvania Turnpike is officially called the "Veterans Memorial Highway", but is commonly referred to by locals as the "Blue Route".