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USA Road Map showing state routes, U.S. highways, interstate highways, major roads, local connecting roads, secondary roads, and other important road networks across the United States.

USA Road Map

About Map: Map showing major roads, local connecting Road, secondary Road, Important Local Road of the USA, United States.

PDF Map - USA Road & Highways Map

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US Highways & Interstate Highways

There are four major systems of roadways in the United States: Interstate Highways, U.S. Highways, State Highways, and County Highways. Highways are typically categorized using route numbers or letters, and each system is identified by a distinctive highway shield symbol displayed along the route. These symbols help travelers easily recognize the type of roadway they are using. The USA Road Map shown below highlights major transportation routes, including Interstate Highways, U.S. Highways, and State Highways across the country.

The Interstate Highway System is a network of controlled-access highways funded by the federal government and maintained by individual states. The system includes around 70 primary Interstate routes that connect major cities and regions throughout the country. Millions of people rely on these highways every day for commuting, long-distance travel, and commercial transportation. Interstate Highways form the backbone of the U.S. transportation system and are built according to strict engineering standards to support high-speed travel while ensuring safety and efficiency.

Interstate Highways also include auxiliary routes, which are typically identified by three-digit route numbers. These routes serve as bypasses, connectors, or loops around major cities. All Interstate Highways are part of the National Highway System, a network of roads considered essential for the nation’s defense, economy, and mobility. Interstate routes exist not only in the 48 contiguous states but also in Alaska, Hawaii, and Puerto Rico.

The United States Numbered Highway System, coordinated by the American Association of State Highway and Transportation Officials (AASHTO), is an older network consisting mainly of surface-level trunk roads. Over time, the Interstate system has replaced many U.S. Highways as the primary routes for long-distance travel. As a result, several historic highways, including U.S. Route 21 and the famous U.S. Route 66, have been shortened or decommissioned.

State highways form another important part of the U.S. road network and are managed individually by each state. These highways vary widely in size, traffic capacity, and design. Some state highways carry heavy traffic and are built to standards similar to Interstate highways, while others are smaller regional roads that primarily serve local communities.

U.S. Interstate Highways, State Routes & Major Roads Facts

List of United States Interstate Highways

List of United States Numbered Highways