SGER: Responding to the Unexpected: Understanding Travelers' Behavioral Choices in the Wake of the Mississippi River Bridge Collapse

这个探索性研究（SGER）项目旨在收集桥梁倒塌后易腐烂的交通数据，以了解旅行者的行为选择以及交通如何从不平衡状态演变为潜在的平衡状态。 最近，明尼阿波利斯市密西西比河上的35 W州际公路大桥倒塌，立即造成生命损失，并对双城大都市地区的流动性和可达性造成严重后果。在这样一个严重的网络中断，交通平衡已被打乱，旅行者需要学习新的交通模式，并最终（可能需要数周）网络交通可能会演变成一个新的平衡（如果有的话）。了解旅行者行为反应的转变和学习过程对于网络中断后的有效交通管理和长期交通规划至关重要。 将收集汇总的公路交通数据和分类的旅行者行为选择数据。 由于交通模式在日常环境中不断演变，随着时间的推移，旅行者越来越难以回忆起他们的选择，数据收集的质量随着时间的推移而下降。因此，本项目中提出的数据收集工作需要立即启动。本项目解决了美国各地道路使用者目前面临的一个主要和紧迫的问题。除了I-35 W大桥倒塌的悲剧外，最近关于通往加州I-80海湾大桥的坡道倒塌的头条新闻也说明了网络的脆弱性。考虑到这类事件造成的重大公共痛苦，这项研究的目标对我们社会的福祉至关重要。PI将尽最大努力将研究结果广泛传达给运输工程和规划界，并将研究结果整合到教育下一代工程师中。

This Small Grant for Exploratory Research (SGER) project aims to collect perishable traffic data after the bridge collapse to understand travelers' behavioral choices and how traffic evolve from a dis-equilibrium state to a potential equilibria. The recent collapse of the Interstate 35W Highway Bridge over the Mississippi River in Minneapolis has resulted in immediate loss of life and serious consequences for mobility and accessibility in the Twin Cities metropolitan region. Under such a severe network disruption, the traffic equilibria has been disturbed and travelers need to learn new traffic patterns and eventually (it may take weeks) network traffic may evolve into a new equilibria (if any). Understanding the transition and learning processes of travelers' behavioral responses are essential to effective traffic management after network disruption and long-term transportation planning. Both aggregated highway traffic data and disaggregated traveler behavioral choice data will be collected. Because the traffic pattern is evolving in a day-to-day context and it becomes more and more difficult for travelers to recall their choices as time passes, the quality of data collection fades over time. Therefore the data collection effort proposed in this project needs to be initiated immediately.This project addresses a major and immediate problem that road users throughout the United States currently face. Besides the tragedy of I-35W Bridge collapse, recent headline news on the collapse of the ramp leading to the I-80 Bay Bridge in California also illustrates the vulnerability of the network. Considering the significant public distress caused by such events, the objectives of this research are crucial to the well-being of our society. The PIs will make their best effort to convey the findings from this research widely to the transportation engineering and planning community, and to integrate the findings to educate the next generation of engineers.