Traffic fatalities in the US have been rising among pedestrians even as they fall among motorists. Contemporaneously, the US has undergone a significant shift in consumer preferences for motor vehicles, with larger Sport Utility Vehicles comprising an increased market share. Larger vehicles may pose a risk to pedestrians, increasing the severity of collisions. I use data covering all fatal vehicle collisions in the US and exploit heterogeneity in changing vehicle fleets across metros for identification. Between 2000 and 2019, I estimate that replacing the growth in Sport Utility Vehicles with cars would have averted 1,100 pedestrian deaths. I find no evidence that the shift towards larger vehicles improved aggregate motorist safety.

在美国，行人中的交通死亡人数一直在上升，即使他们在驾车者中有所下降。与此同时，美国消费者对机动车辆的偏好发生了重大转变，大型运动型多功能车的市场份额不断增加。较大的车辆可能对行人构成风险，增加碰撞的严重性。我使用涵盖美国所有致命车辆碰撞的数据，并利用跨地铁更换车队的异质性进行识别。在 2000 年到 2019 年之间，我估计用汽车取代运动型多功能车的增长将避免 1,100 名行人死亡。我发现没有证据表明转向更大的车辆可以提高总体驾车者的安全性。