Construction background
According to public survey data, one person per day in the world is injured by a car every seven minutes. Every two hours or so, a pedestrian is killed in a car accident. Especially in the national provincial roads, county roads, village intersections, non-light control intersections where drivers have poor visibility, pedestrians and non-motor vehicles cross the road, causing a large proportion of traffic accidents, and often a major casualty accident. Most of them have always lacked effective sci