拥有８７万人口的安徽省定远县，地处皖东大地，属典型的丘陵地带，境内有三条省道穿过，交通流量大、地形复杂、交通事故频发。全县现有在校中、小学生１４万人，分布在全县５５个乡镇的５００所学校，有三分之一以上学校紧靠公路沿线，学生上学放学要从马路上通过，交通... Dingyuan County of Anhui Province, with a population of 870,000, is located in the eastern part of Anhui Province, a typical hilly region with three provincial highways passing through it. The traffic volume is large, the terrain is complex, and traffic accidents occur frequently. The existing county school, primary and secondary school 140,000 people, distributed in 55 counties and township 500 schools, more than one-third of the schools close to the road along the road, students go to school from the road through the school, traffic ...