The COVID-19 pandemic has resulted in significant social and economic impacts throughout the world. In addition to the health consequences, the impacts on traffic behaviors have also been sudden and dramatic. We have analyzed how the road traffic safety of New York City, Los Angeles, and Boston in the U.S. have been impacted by the pandemic and corresponding local government orders and restrictions. To be specific, we have studied the accident hotspots' distributions before and after the outbreak of the pandemic and found that traffic accidents have shifted in both location and time compared to previous years. In addition, we have studied the road network characteristics in those hotspot regions with the hope to understand the underlying cause of the hotspot shifts.

翻译：COVID-19大流行对全世界的社会和经济产生了重大影响,除了健康后果外,对交通行为的影响也是突然和剧烈的,我们分析了美国纽约市、洛杉矶和波士顿的道路交通安全如何受到这一流行病的影响以及相应的地方政府命令和限制。具体地说,我们研究了该流行病爆发前后的事故热点分布,发现与前几年相比,交通事故在地点和时间上都发生了变化。此外,我们还研究了这些热点地区的公路网络特点,希望了解热点变化的根本原因。