目前天津市区公共汽车线路平均运行速度只有12.5公里/小时,不仅和上海、北京的差距很大,而且和天津1965年的情况相比也下降了15%。由于公共汽车慢,而骑自行车又快又方便,这样骑自行车的人越来越多。现在天津市内自行车已达138万辆,以城市单位面积自行车拥有量计算已占全国首位。马路上自行车越增加,公共汽车在道路空间上占的比重就要减小。由于车辆拥挤,汽车 At present, the average speed of bus lines in Tianjin is only 12.5 km / h, which is not only far from that of Shanghai and Beijing, but also decreases by 15% compared with the case of Tianjin in 1965. Due to the slow bus, and riding a bike fast and easy, so more and more people riding a bike. Now the bicycle in Tianjin has reached 1.38 million, accounting for the first place in the country in terms of bicycle ownership per urban area. The more bikes on the road, the smaller the proportion of buses in road space. Due to the crowded cars, cars