A variable message sign (VMS), also known as a changeable message sign (CMS), is a programmable traffic control device that can usually display any combination of characters. These signs may be either portable, in which case they can be attached to a trailer and driven to a desired location, or permanent, in which case they are usually installed above the roadway. Highway advisory radio (HAR) units can be used to transmit traffic information to a vehicle's AM radio.


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    Titel :

    Guidelines for the Effective Operation and Control of VDOT Permanent Variable Message Sign and Highway Advisory Radio Units: State of the Practice and Recommendations


    Beteiligte:
    J. S. Miller (Autor:in)

    Erscheinungsdatum :

    1996


    Format / Umfang :

    41 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




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