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  • Outdoor EMCS LED Sign
  • Indoor Strip LED Message Sign
  • LED Digit & Scoreboard
  • LED Transportation Display
  • Digital Billboard & Video Wall
  • Customized LED Display
  • Variable Speed Limit Sign (VSLS)

    Variable Speed Limit Sign (VSLS) is mainly used to display the speed limit values, and the speed limit values can be changed. VSLS can assist traffic managers in scientific and efficient traffic management, and dynamically adjust the speed limit value according to the actual conditions on the road. Comsight VSLS has a full dot matrix design and is therefore a multi-purpose transportation display.

    Detailed Description

    Multi-purpose Applications: 

    — Speed limit sign

    — Lane control signal(stop-and-go lights)

    — Warning sign(No Parking, No Phone, No Horn, etc)

    — Indicator sign  (School, Village, Road Closed, etc.)  and so on.

    Reliable, Intelligent and Safe System: 

    ● Support to display monochrome, tri-color, multi-color and RGB full colors.

    ● Support multi-lingual characters (including Arabic), symbols, pictures, graphics, animations and videos etc.

    ● Can dynamically display notifications, messages, traffic signs, warning signs, guide maps, LOGO, time, 

       temperature, weather, etc., as well as pictures, animations, videos for promotion.

    ● Easy connection, support LAN, WiFi, 4G and other wireless methods.

    Support NTCIP (National Transportation Communications and ITS Protocol), DGT, or other customized protocol 

    ● Comply with GB/T 23828-2009 and other standards 

    ● Reliable: 

    — Adopt high-quality and high-brightness LED, high-efficiency and high-temperature resistant Meanwell power supply, industrial-grade mainboards 

        and components. Derating use on parameters and leaving enough margin to ensure long-term stability and reliability.

    — Adopt an all-weather design and use AkzoNobel`s powder coating to withstand harsh weather conditions and ensure long-lasting durability.

    — For thermal management, we have a complete and comprehensive design: use high-brightness LED, high-efficiency power supplies and 

        low-voltage supply to reduce the heat productivity inside the cabinet; use light-colored cabinets with double-layer design to reduce the solar 

        radiation impact; use an optimized design of fan-forced cooling system to accelerate the heat dissipation inside the cabinet. These comprehensive 

        measures will reduce the temperature rise of the VMS, improve the reliability, and reduce the light decay of the LED.

    — With N+1 power supply backup. When the power supply fails, the backup power supply will seamlessly take over and notify the control center.

    ● Intelligent:

    — Intelligent full monitoring capability: detect LED failures, monitor door status, power supply, fan, dust filter, internal temperature, ambient temperature, etc., 

        and have a long-term preservation for the log records in the control center database.

    — Intelligent brightness adjustment function: based on the real-time monitoring of ambient brightness, proceed non-linear automatic dimming control (automatic mode).

    — Powerful software for traffic information management knows everything about the running status of the VSLS. When the display content is updated, 

        the LED is faulty, or the monitoring status is abnormal, it will feed back to the control center and send SMS to the operator, even if the operator is not at the 

        control center, he can also know the running status of VSLS in time.

    — Intelligent alarm function: Users can preset the temperature value for the alarm, brightness down, display off and power off. 

        The VSLS will carry out the corresponding actions according to the monitored temperature value.

    ● Safe:

    — VSLS has surge protection, leakage protection and other safty measures

    — High temperature protection function: When the VSLS temperature exceeds the set value, it will take the corresponding actions of alarm, 

        brightness down, display off and power off, timely proceed the high temperature protection to ensure 

        the safety for the VSLS and prevent the occurrence of fire.

    — Traffic information management software, with login password protection function, unauthorized person can not operate the software and VSLS; 

        encrypted communication between the management software and VSLS, illegal softwares are forbidden to control the VSLS, 

         to ensure the VSLS operation of high security and accuracy.


    General Technical Specifications
    Display type
    Text, symbol, picture, graphic, logo, mark, animation, etc.
    Color displayed Monochrome, tri-color, multi-color and RGB full colors*
    Pixel pitch
    10mm, 12mm, 14mm, 16mm, 20mm, 25mm, 31.25mm etc.*
    Pixel configuration
    1R1G1B etc*
    48 x 48, 64 x 64 etc.*
    Red:3100;  Green:3770;  Blue:1240;  Yellow:7440; White:12400  (L3, according to EN12966, customized.)
    Contrast ratio
    R2 (according to EN 12966)
    Viewing angle (degree)
    H30/V30(B7, according to N12966)*
    Driving IC
    With single LED detection function.
    Brightness control
    LED color
    C1(according to EN12966)
    Brightness adjustment
    256 levels
    IP level
    Front IP65 Rear IP54   (P2 according to EN 12966) *

    Support NTCIP (National Transportation Communications and ITS Protocol), DGT, or other customized protocol

    Housing material Aluminum*
    Working temperature
    -25℃ to +60℃(T1、T2, according to EN12966)*
    Humidity range
    Communications options
    RS232, RS422/485, GPRS, 4G, Ethernet, TCP/IP via RJ45 (default)
    Average LED lifetime 100000 hours

    Remarks: for any detailed or customized solution, please do feel free to contact us directly (

    Typical Projects