Average hourly traffic volumes in each state

Traffic volumes were pre-processed to calculate average hourly traffic volumes in each state for each of the years 2013-2019. Data were originally downloaded at the level of individual traffic stations from the Office of Highway Policy Information (https://www.fhwa.dot.gov/policyinformation/tables/tmasdata/#y19)已对交通流量数据进行预处理，以计算2013年至2019年各年度美国各州的小时平均交通流量。原始数据最初以单个交通监测站点为粒度，从美国公路政策信息办公室（Office of Highway Policy Information，https://www.fhwa.dot.gov/policyinformation/tables/tmasdata/#y19）下载获取。