为确保现代有轨电车在道路交叉口能够优先、安全通行，对有轨电车的信号优先理论进行 了研究。首先，在传统信号配时方法TRRL的基础上，对现代有轨电车信号配时的关键参数进行 了分析，并对交叉口各相位的信号时长进行优化。然后，鉴于现代有轨电车通过交叉口时会形成 离散交通流，研究并提出了其特定的延误公式，构建以人均延误最小为目标函数的固定信号配时 优化模型；同时，还提出了该优化模型的求解思路。最后，以武汉东湖新技术开发区现代有轨电 车T1 线为例，用优化模型与传统信号配时模型进行了仿真分析与对比，从而对优化模型进行了 验证。结果表明，采用有轨电车优先的固定信号配时优化模型后，尽管车均延误有所增加，但人 均延误却有明显的减小，交叉口整体运行效益最大，验证了固定信号优化模型的有效性。

The theory of modern tram priority signal at the intersection was studied to ensure the safe and prior traffic of modern tram through the intersection. Firstly, the timing parameters of the modern tram priority signal at the intersection were studied on the basis of conventional signal timing method called TRRL, and the signal time of each phases of intersections was optimized. Then, considering the discrete traffic flow would be caused when modern trams passed through intersections, the delay formula was given and the optimization model of fixed signal timing with the objective function of minimum aver⁃ age delay was constructed; while the detailed process was given. Finally, with the case of the modern tram T1 line of Wuhan East Lake High-Tech Development Zone, the optimization model and the conven⁃ tional signal timing model were contrasted through simulated analysis in order to verify the model. The results of data analysis show that the per capita delay reduces obviously although the average vehicle de⁃ lay increases when the fixed signal timing optimization model is used, which maximizes the total opera⁃ tion benefit of the intersection.