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

SGER：应对意外情况：了解密西西比河大桥倒塌后旅行者的行为选择

• 批准号: 0753580
• 负责人: Henry Liu
• 金额: $ 1.7万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-15 至 2008-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0753580&HistoricalAwards=false
• 关键词: SGER; Responding; Unexpected; Understanding; Travelers

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.

这个探索性研究小额赠款（SGER）项目旨在收集桥梁倒塌后的易损性交通数据，以了解旅行者的行为选择以及交通如何从非均衡状态演变到潜在均衡状态。最近，明尼阿波利斯密西西比河上35W州际公路大桥倒塌，直接造成人员伤亡，并对双子城大都市区的交通和可达性造成严重后果。在如此严重的网络中断下，流量平衡已经被打乱，旅行者需要学习新的流量模式，最终（可能需要数周）网络流量可能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。综合公路交通数据和分类旅客行为选择数据都将被收集。由于交通模式在日常环境中不断变化，随着时间的推移，旅行者越来越难以回忆起自己的选择，因此数据收集的质量也会随着时间的推移而下降。因此，在这个项目中提出的数据收集工作需要立即启动。该项目解决了美国道路使用者目前面临的一个重大而紧迫的问题。除了I-35W大桥倒塌的悲剧，最近关于通往加州I-80海湾大桥的匝道倒塌的头条新闻也说明了交通网络的脆弱性。考虑到这些事件引起的重大公众困扰，本研究的目标对我们社会的福祉至关重要。pi将尽最大努力将这项研究的结果广泛传达给交通工程和规划社区，并将研究结果整合到下一代工程师的教育中。