United States Road Classification

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--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

Trunk

Unless part of the "Interstate system"

Primary

Unless classified as "Trunk or higher"

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"

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