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  2. Variable-message sign - Wikipedia

    en.wikipedia.org/wiki/Variable-message_sign

    A variable-(also changeable-, [1] electronic-, or dynamic-) message sign or message board, often abbreviated VMS, VMB, CMS, or DMS, and in the UK known as a matrix sign, [2] is an electronic traffic sign often used on roadways to give travelers information about special events.

  3. Road traffic control device - Wikipedia

    en.wikipedia.org/wiki/Road_traffic_control_device

    Variable message sign in Mercer County, New Jersey. Variable-message signs, or VMS, are electronic traffic control signs which can display different traffic messages according to the needs of a specific road. Permanent VMS displays are mounted on large sign structures overhead or alongside the road.

  4. Active traffic management - Wikipedia

    en.wikipedia.org/wiki/Active_traffic_management

    Variable speed limits displayed on overhead lane control signs (LCS) above each lane are used to reduce traffic speed prior to a congestion point. Variable message signs (VMS) accompany the reduced speed limit to warn drivers of slow traffic.

  5. Intelligent transportation system - Wikipedia

    en.wikipedia.org/wiki/Intelligent_transportation...

    Intelligent transport systems vary in technologies applied, from basic management systems such as car navigation; traffic signal control systems; container management systems; variable message signs; automatic number plate recognition or speed cameras to monitor applications, such as security CCTV systems, and automatic incident detection or stopped vehicle detection systems; to more advanced ...

  6. Traffic warning sign - Wikipedia

    en.wikipedia.org/wiki/Traffic_warning_sign

    A warning sign is a type of sign which indicates a potential hazard, obstacle, or condition requiring special attention. ... Variable-message sign; References

  7. Traffic light - Wikipedia

    en.wikipedia.org/wiki/Traffic_light

    A speed sign is a special traffic light, variable traffic sign, or variable-message sign giving drivers a recommended speed to approach the next traffic light in its green phase [37] and avoid a stop due to reaching the intersection when lights are red. [38] [a]

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