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采用路侧激光交通调查设备对城市道路信号交叉口下游12个断面的车速进行调查,得到5个车道12个断面的车速值。采用回归分析方法利用11种回归曲线对各车道车速与距离的关系进行分析,建立了各车道高峰和平峰时段的车速回归方程。对高峰和平峰时段各车道同一断面车速平均值与距离的关系进行分析,得到了相应的回归关系模型。回归分析表明:除了第1车道外,各车道车速与距离具有较好的相关性;各车道同一断面车速平均值与距离具有较强的相关性。研究结果表明:高峰和平峰时段车速在距上游交叉口700 m左右趋于离散;平峰时段车速略高于高峰时段,700 m之后高峰和平峰时段的车速基本相等。
The roadside laser traffic survey equipment was used to investigate the speed of the 12 sections downstream of the urban road intersection, and the vehicle speed values of 12 sections in 5 lanes were obtained. Regression analysis method was used to analyze the relationship between vehicle speed and distance by using 11 kinds of regression curves. The vehicle speed regression equation was set up for each lane peak and peak hour. The relationship between the average speed and the distance of the same section of every lanes at peak and peak hours was analyzed and the corresponding regression model was obtained. Regression analysis shows that: except for the first lane, the speed and distance of each lane has a good correlation; the average speed of the same section of each lane has a strong correlation with the distance. The results show that the speed of the peak and peace peak tends to be discreet about 700 m away from the upstream intersection; the speed of the peak is slightly higher than that of the peak and the speed of the peak and peak after 700 m is basically the same.