A fast road convex vertical curve section of the variable speed limit control method

The present invention discloses a variable speed control method of a vertical curve convex fast road sections, the downhill section of traffic flow detector is mounted, is mounted at the uphill end of the passage plate-side variable information presentation using wave propagation velocity is calculated congestion selection optimal speed Limit for Expressway road uphill convex vertical curve, the driver realizes variable speed in the fast convex vertical curve section of road conditions poor line of sight control, you can make a driver into the convex vertical curve before the road ahead will reduce speed to a safe speed, thus preventing rear-end accidents caused by traffic congestion due downhill. This control method is more fit the actual traffic flow characteristics and is simple and easy to implement, has a wide range of engineering value and good prospect in convex vertical curve sections of roads prevent rear-end fast under poor sight conditions accident.