报告题目：基于高分辨率信号数据和浮动车旅行时间数据的主干道通行效率可视化与评估报告人：Prof. Darcy Bullock报告时间：2011年6月13日下午3:30-5:30报告地点：新主楼第八会议室报告人简介：Darcy Bullock，普渡大学土木工程系教授，联合运输研究项目主任。1987年获佛蒙特大学学士学位，1988获卡耐基梅隆大学硕士学位，1992年获卡耐基梅隆大学博士学位。先后获得“美国土木工程师协会交通运输工程学报最佳论文奖”、“交通工程学会最佳论文奖”、“交通信号系统委员会最佳论文奖”。1998年加盟普渡大学，主要研究方向为智能交通系统的信号控制干道和行人设施。报告简介：Coordination is essential to providing the highest possible quality of service on signalized arterials through movements, and travel time is its most accurate yet most expensive measure. This talk presents a methodology for evaluating signal coordination that combines high resolution signal data with travel time measurement using Bluetooth device MAC address matching. The Purdue Coordination Diagram (PCD) is introduced as a tool for visualizing and quantitatively evaluating signal performance and identifying opportunities for improvements. This diagram plots the arrival time of each vehicle at an intersection using input from setback detectors, in combination with information about the phase state (red and green intervals). On a cycle-by-cycle basis, it is possible to view the arrival of each platoon relative to the start and end of green. At a higher level, the performance of the green band can be qualitatively evaluated through visual inspection of the concurrence (or lack of) of vehicle platoons within the green bands. Quantitative measures such as the percent of vehicles arriving on green can be extracted from aggregation of the data and used as objective functions in optimization models. Arterial travel times were measured using MAC address matching using intersection and midblock detecting stations to identify time periods with opportunities to make timing improvements. Using this technique, optimal offsets were calculated for a Saturday plan on a four-intersection signalized corridor, and the operational impacts were estimated. These offsets were then implemented. The number of vehicles in the corridor arriving on green increased from 56% to 66%, while median northbound travel time observed by tracking Bluetooth devices decreased by 1.9 minutes. The talk concludes by discussing the application of Bluetooth tracking to airport security lines and work zone origin-destination research. 编辑：贾爱平
