Highway height limit advanced early warning system

The utility model discloses an advanced early warning system for road height limit. The advanced early warning system comprises an ultrahigh measuring electronic sensor, an ultrahigh information display board, an early warning horn, a guide sign and a height limit frame which are sequentially arranged in front of a road structure from far to near in the driving direction, the superelevation measurement electronic sensor is used for intercepting or cutting a set number of sound and light signal lines by using an over-limit vehicle, and then transmitting an over-limit signal to the superelevation signal display board after identification and judgment; the over-limit information display board is used for displaying vehicle over-limit and guide signals; the information guide board (including a necessary simple turning place) is used for turning of overrun vehicles and information guidance; and the height limiting frame is used for limiting passing of ultrahigh vehicles. According to the utility model, the vehicle