1.Gantry-type variable Electronic information screen is the main way of information transmission of expressway, because of larger volume generally using gantry as a variable electronic display bracket, from the main monitoring computer through the communication network to implement remote control, transmit and display a variety of graphic information, to the driver timely release different road surface conditions and various types of traffic information, and traffic regulations, traffic knowledge publicity, to reduce the expressway reproducibility congestion, reduce the impact of the expressway non-recurring accident, improve the purpose of driving safety To effectively divert traffic and improve the efficiency of the expressway.
2.The variable speed limit display is mostly set in some road condition complex or the special large bridge's key section, mostly by the circular or the single arm suspension single block screen primarily. Remote control through the communication network by the Monitoring Center computer transmits and displays the speed limit mileage or short traffic information, which prompts the vehicle to travel in accordance with the speed limit and to ensure the safety of driving.
3.In expressway construction and maintenance, the highway authorities or construction personnel temporarily closed or changed lanes, how to inform road users of traffic information is very important. Fixed variable information board is restricted to road construction site is uncertain or far away, not easy to play its effect. Mobile Traffic Information screen (car-mounted screen) with small flexible and lightweight, suitable for installation in the trailer-type motor, can be placed at anytime and anywhere in the target site directly display, to make up for the fixed variable Intelligence board.