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.
New York State Thruway
The New York State Thruway system is a collection of six individual components across the state of New York that connect the state to four neighboring states (Connecticut, Massachusetts, New Jersey, and Pennsylvania) as well as the Canadian province of Ontario. Together, the highways extend for , making the Thruway system one of the largest toll highway systems in the United States. The longest of the six components is the mainline. Of the 570 miles in the Thruway system, (98.4%) carries at least one Interstate Highway designation. Only three sections of the system are not part of the Interstate Highway System; these are the Garden State Parkway Connector in Rockland County, a portion of the Berkshire Connector between its western terminus at exit 21A on the mainline near Selkirk and where it joins up with Interstate 90 at exit B1 near Castleton-on-Hudson, and a short section of the mainline within exit 24 in Albany that is located between where I-87 departs the roadway and I-90 enters it. They are designated as New York State Route 982L (NY 982L), NY 912M, and NY 915H, respectively, all unsigned reference routes. The speed limit, enforced by the New York State Police, is 65 miles per hour along most of the Thruway.