【摘要】：針對采用飽和度判定交叉路口交通擁堵存在滯后性問題,提出臨界飽和排隊長度概念,并將相位起始時刻排隊長度與臨界飽和排隊長度的比值定義為排隊擁堵率,通過排隊擁堵率來判定路口交通擁堵狀態(tài),提出單向擁堵與雙向擁堵情況下的公交優(yōu)先策略,并采用Vissim軟件仿真公交優(yōu)先策略的可行性。通過仿真結果可以看出,實施公交優(yōu)先后,優(yōu)先相位的車均延誤與人均延誤顯著降低,而非優(yōu)先相位的車均與人均延誤略有增加,但整個相位周期的車均延誤變化不大,而人均延誤降低較多。研究結果表明,采用排隊擁堵率判定交通擁堵,并在擁堵情況下實施公交優(yōu)先具有可行性。
[Abstract]:In order to solve the lag problem of traffic congestion at intersection by saturation, the concept of critical saturation queue length is proposed, and the ratio of phase starting time queue length to critical saturation queue length is defined as queue congestion rate. The traffic congestion state of intersection is determined by queue congestion rate, and the bus priority strategy under one-way congestion and two-way congestion is put forward, and the feasibility of bus priority strategy is simulated by Vissim software. The simulation results show that after the implementation of bus priority, the vehicle delay and per capita delay of priority phase are significantly reduced, while the non-priority phase vehicle and per capita delay increase slightly, but the vehicle delay of the whole phase cycle does not change much, but the per capita delay decreases more. The results show that it is feasible to use queuing congestion rate to determine traffic congestion and to give priority to public transport under the condition of congestion.
【作者單位】： 四川大學計算機學院;四川大學電氣信息學院;
【基金】：國家“863”計劃資助項目(2014AA110302)
【分類號】：U491.17;U491.23

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