List of state highways in Idaho

State Highway 3 marker
State Highway 75 marker
State Highway 200 marker
Highway markers for State Highways 3, 75 and 200
Highway names
InterstatesInterstate X (I-X)
US HighwaysU.S. Route X (US-X)
System links
  • Idaho State Highway System

The Idaho Transportation Department (ITD) is responsible for the establishment and classification of a state highway network, including 5,000 miles (8,000 km) of roads that are classified as Interstate Highways, U.S. Highways, and state highways within the state of Idaho in the United States.[1] The current state highway marker consists of a white background, black numbering, and a solid black geographic outline of the state of Idaho.

  1. ^ "Frequently Asked Questions". Idaho Transportation Department. Retrieved February 15, 2017.