上海最早的红绿灯设在哪条路?最早的横道线是怎样的?从前的交警值勤为什么叫“立角子”?本文将一一阐明。红绿灯和“立角子”随着社会的发展,城市道路上的车辆、行人越来越多,如果任随四面的人、车同时过路口,那就会发生冲撞,产生矛盾和纠纷。于是人们就想出了一个“错时通行”的办法,用红灯来阻止车辆通行;用绿灯来引导车辆行进(当初行人是不受限制的)。过一段时间变换灯色,轮流让纵向、横向的来车行进或在路口暂停。这就是不塞不流、不止不行的道理。这个简单的道理是英国人于1859年首先 Shanghai where the earliest traffic lights located? What is the first crosswalk? Formerly known as the traffic police on duty “stand angle”? This article will be clarified one by one. With the development of society, more and more vehicles and pedestrians on the road in the city will collide and generate conflicts and disputes if they cross the road at the same time. So people come up with a “wrong way” approach, with red light to stop the vehicle traffic; green light to guide the vehicle to travel (the original pedestrian is not limited). After a period of change of light color, take turns to vertical and horizontal car to go or suspended at the junction. This is not blocked, not only does not work. The simple truth is that the British first came in 1859