United States Road Classification

Part of WikiProject United States.

--List--

This list is the base for US road classification. It is based off the US administative system already in place with minor modifications for trunk class and urban areas. Any state, or city clarifications should be noted on their apropriate page.

Motorway

• Interstate Highways
• Freeway
• A Divided highway that is entirely grade separated.

Trunk

Unless part of the "Interstate system"

• A high speed Arterial Divided highway that is partially grade separated.

Primary

Unless classified as "Trunk or higher"

• Interstate Business Routes
• US Routes
• US Business route
• State Routes in dense urban areas.

Secondary

Unless classified as "Primary or higher"

• State Routes
• State Business route
• Major Urban Streets = Streets in Urban areas with high amount of traffic, usually lined with businesses and controlled with traffic lights. (Often roads that cross highways and rivers)

Tertiary

Unless classified as "Secondary or higher"

• County Route
• Forest_Route
• Indian Route
• National Scenic Byway
• Other

Residential

Unless classified as "Tertiary or higher"

• Minor Roads in residential areas.

Unclassified

Unless classified as "Residential or higher"

• Minor Roads.

Service

• Alley, Driveway, Parking_aisle, other service

See Also

• Key:highway
• Highway Functional Classification System
• Road signs in the United States
• Interstate Highways
• United States roads tagging