Existing unconventional intersection designs mainly apply to large intersections, such as the intersection of two major roads, in which there are numerous lanes on each leg and the allowed queue length is long. This paper presents a new unconventional intersection design to improve the operational efficiency of the intersections with limited traffic lanes and short distance for vehicular queuing, such as the intersections on collector roads. The new design combines the advantage of the tandem control and exit-lanes for left-turn control (CTE). An optimization model is established to maximize the capacity of the intersection under the CTE design in which the allocation of the mixed-usage lane, lane markings, and signal timings are integrated. A case study and extensive numerical analysis are conducted to evaluate the performance of the proposed model. Comparisons are made between the proposed CTE design and the other three designs, namely the tandem design, exit-lanes for left-turn design, and conventional design, under different geometric and traffic demand cases. The results show that CTE design has promising property when the left turn ratio is low to medium (<; 50%), and the queue length is limited (<; 200m).

中文翻译：

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车道和排队空间有限的交叉口的替代设计


现有的非常规交叉口设计主要适用于大型交叉口，例如两条主干道的交叉口，每条路段车道较多，允许排队长度较长。本文提出了一种新的非常规交叉口设计，以提高车道有限、车辆排队距离短的交叉口（例如支路交叉口）的运行效率。新设计结合了串联控制和左转控制（CTE）出口车道的优点。建立了优化模型，以最大限度地提高CTE设计下交叉口的通行能力，其中综合了混合用途车道的分配、车道标线和信号配时。通过案例研究和广泛的数值分析来评估所提出模型的性能。在不同的几何和交通需求情况下，将所提出的 CTE 设计与其他三种设计（即串联设计、左转出口车道设计和传统设计）进行了比较。结果表明，当左转弯比为低至中等（<；50%）且队列长度有限（<；200m）时，CTE 设计具有良好的性能。