摘要
为了分析城市土地利用对道路的交通影响,需要准确地分析城市建筑物出口与道路连接处的通行能力。对建筑物出口车流插入的实际交通运行特征进行了深入分析,在参照主路优先的无信号交叉口的可插入间隙理论模型基础上,通过实际调查数据对模型的车辆长度、安全间距、加速度和主路可接受间隙等关键参数进行分类量化修正和标定,解决了原模型难于反应建筑出口可容纳排队车辆数及主路车流速度对建筑物出口可插入车流能力的影响的问题,能有效得出不同等级城市道路的建筑物出口所能承受的插入车流量。新的模型与实际交通情况具有更高的拟合度,为准确评估地块开发后对所在道路的交通影响提供了量化参考,提高了城市规划的科学性。
In order to carry out traffic impact analysis in a more scientific manner,the capacity of the intersections between land use units and roads need to be carefully studied.The operating characteristics of merging traffic from land use units are analyzed.Based on the acceptable gap theory,which has been widely used to examined the capacity of unsignalized T-intersections,the model parameters,such as vehicle length,safe gap,acceleration and acceptable gap on the main road,are estimated and calibrated on the basis of actual survey data.The model developed accounts for the impact of the queuing capacity at the exit of land use units and the traffic speed on the main road to the merging traffic and therefore can be used to estimate the maximum merging volumes of urban roads from different functional classes.The model proposed here can better simulate real-world traffic behavior and can provide a better quantitative analysis tool of traffic impact of land development.
出处
《交通信息与安全》
2015年第1期60-65,共6页
Journal of Transport Information and Safety
