Final answer:
U.S. route numbers, Interstate route numbers, and state route numbers are used to designate different highways and roads in the United States.
Step-by-step explanation:
U.S. route numbers, Interstate route numbers, and state route numbers are used to designate and identify different highways and roads in the United States. These numbers help drivers navigate and find their way around the country.
U.S. route numbers are assigned to major highways that connect multiple states. Examples of U.S. routes include Route 66, which runs from Chicago to Los Angeles, and Route 1, which stretches from Maine to Florida.
Interstate route numbers are used for the Interstate Highway System, a network of highways that spans the entire country. Interstate routes are labeled with a two-digit number, with even numbers indicating east-west routes and odd numbers indicating north-south routes.
State route numbers are assigned by individual states to their own highways and roads. These numbers typically have three or four digits and help drivers navigate within a specific state.