The COVID-19 pandemic has been unprecedented in its scale and speed, impacting the entire world, and having an impact on metropolitan transportation systems. New York City (NYC) was especially hard hit in March and April 2020. A mandatory stay-at-home order was instituted, with all but essential businesses ordered closed. In this paper we examine the impact on the Citi Bike system and the NYC subway. Usage patterns during the lockdown are compared to corresponding days in 2019. Controlling for weather patterns we examine the effect of the lockdown and subsequent reopening of economic activity up through the end of September 2020. The results show that both subway ridership and bikeshare usage plummeted initially; bikeshare usage has nearly returned to normal while subway ridership remains substantially below pre-COVID levels. Implications for policy suggest that the bikeshare system provides resilience to the overall transportation system during disasters when public transit is considered dangerous or is disrupted.

COVID-19 大流行的规模和速度都是前所未有的，影响了整个世界，并对大都市的交通系统产生了影响。纽约市 (NYC) 在 2020 年 3 月和 4 月受到的打击尤其严重。政府颁布了强制居家令，除了必要的企业外，所有企业都被勒令关闭。在本文中，我们研究了对花旗自行车系统和纽约地铁的影响。将封锁期间的使用模式与 2019 年的相应日期进行比较。在控制天气模式的情况下，我们研究了截至 2020 年 9 月底封锁和随后经济活动重新开放的影响。结果显示，地铁乘客量和共享单车使用量最初均大幅下降;共享单车的使用几乎恢复正常，而地铁乘客量仍大大低于新冠疫情前的水平。对政策的影响表明，在公共交通被认为危险或中断的灾难期间，共享单车系统为整个交通系统提供了弹性。