周期与流量对交叉口排放和延误的影响

Impacts of Cycle Length and Volume on Traffic Emissions and Delay at Signalized Intersections

摘要:

考虑车辆到达类型（可表征交叉口信号联动质量），基于交通波理论重构交叉口车辆运行轨迹，进而应用机动车比功率模型（VSP）开发了信号控制交叉口排放估计算法，并结合HCM 2010延误模型，分析了不同到达类型下信号周期和流量对交叉口排放及延误的影响及排放和延误的博弈关系.结果表明，在相同条件下，交叉口联动质量越好，交叉口车均排放和延误越小；周期增大，车均排放减小，延误先减小后增大，其中，交叉口联动质量越好，基于延误最小的最优周期越大；车均排放对流量的变化较不敏感，而延误受流量影响较大.

关键词:信号交叉口; 到达类型; 交通排放; 延误

Abstract:

Considering different arrival types which can represent the quality of the progression, this study developed an emission estimation algorithm at signalized intersections by reconstructing the vehicle trajectory based on shock wave theory and applying Vehicle Specific Power Model. Then, the delay model proposed in HCM 2010 was combined to analyze the impacts of signal cycle length and traffic demand on emissions and delay, what’s more, the game relationship between emissions and delay was discussed. Results indicate that both emissions and delay per vehicle become smaller when signalized intersections experiencing a more favorable progression under equal condition. As cycle length increases, the pervehicle emissions decrease while the delay decreases and then increases, specifically, the higher quality of the progression, the larger the optimal cycle corresponding to the minimum delay. The impact of traffic flow on pervehicle emissions was found to be insignificant，however, control delay is much more sensitive to traffic demand than emissions.

Key words:signalized intersections; arrival type; traffic emission; delay