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INTERSECTION SIGNAL SYSTEM CAPABLE OF INTELLIGENT NONMOTORIZED TRAVELER ACCOMMODATION

机译:具有智能非标准化旅行者住宿功能的交叉信号系统

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Accommodating pedestrians at urban intersections is challenging as multimodalrnservice demands compete highly on limited green time. Highway Capacity Manual prescribes thernparallel vehicle green must exceed “WALK” plus “pedestrian clearance interval (PCI)” timed byrna design walking speed. This static “PCI” timing is unsafe since seniors or children are usuallyrnslower than the design pedestrian. Furthermore, a vehicle flow issue arises when the prolongedrn“PCI” exceeds the operationally efficient parallel green: additional vehicle right-of-way,rnunnecessary for operational efficiency, preempts green time from a conflicting phase, increasingrnintersection-level queuing delays. It is necessary to achieve a tradeoff among competingrnmultifaceted traveler needs. A pedestrian-detection-based NEMA signal system was developedrnfor an urban isolated intersection. During each phase, the dynamic “PCI” function offers allrnpedestrians the crossing time in real-time need. In simulation setting, the new signal system wasrnevaluated against the conventional NEMA system adopting two design walking speeds andrnproved advantageous for protecting pedestrians and offering competitive performance.
机译:由于多式联运服务需求在有限的绿地时间上竞争激烈,因此在城市交叉路口容纳行人是一项挑战。 《公路通行能力手册》规定,平行的车辆绿色必须超过“步行”加上“步行者间隔时间(PCI)”,并由步行者设计行走速度计时。这种静态的“ PCI”时序是不安全的,因为老年人或儿童通常比设计行人慢。此外,当延长的“ PCI”超过运行有效的并行绿色时,就会出现车辆流量问题:额外的车辆通行权,对于运行效率而言是不必要的,使绿色时间脱离了冲突阶段,增加了交叉路口排队延迟。有必要在竞争的多方面旅行者需求之间进行权衡。针对城市隔离路口开发了基于行人检测的NEMA信号系统。在每个阶段,动态的“ PCI”功能可为行人实时提供穿越时间。在仿真设置中,与采用两种设计行走速度的常规NEMA系统相比,对新信号系统进行了重新评估,并提高了对保护行人和提供有竞争力的性能的优势。

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