Columbia subject headings:
Highway communications--United States.
Intelligent transportation systems.
Transportation--United States--Planning.
Harvard subject headings:
Highway communications--United States.
Intelligent Transportation Systems.
Intelligent transportation systems.
Transportation--Texas--Houston Metropolitan Area--Planning.
Transportation--United States--Planning
Transportation--Washington (State)--Seattle Metropolitan Area--Planning.
Princeton subject headings:
Intelligent transportation systems.
Transportation--Texas--Houston Metropolitan Area--Planning.
Transportation--United States--Planning.
Transportation--Washington (State)--Seattle Metropolitan Area--Planning.