Traffic Volumes 2024

The Annual Average Daily Traffic (AADT) is the estimated mean daily traffic volume and the Commercial Annual Average Daily Traffic (CAADT) is the estimated mean daily traffic volume for commercial vehicles. For continuous sites, estimates are calculated by summing the Annual Average Days of the Week and dividing by seven. For short-count sites, estimates are made by factoring a short count using Seasonal and Axle (if applicable) day-of-week adjustment factors. Data Coverage: The dataset covers the entire Federal Aid System in the State of Michigan Update Cycle: AADT & CAADT volumes are created and released every year. Transportation Data Management System (TDMS) AADT Calculation Help Traffic Monitoring Program年平均日交通量（Annual Average Daily Traffic, AADT）指经估算得到的平均日交通流量；商业车辆年平均日交通量（Commercial Annual Average Daily Traffic, CAADT）则为商用车辆的估算平均日交通流量。 对于连续监测站点，其估算值通过累加各星期的年平均日交通量后除以7计算得到。对于短时计数站点，其估算值通过结合季节性及轴重（如适用）星期几调整系数对短时计数数据进行修正得到。 数据覆盖范围：本数据集覆盖密歇根州境内全部联邦资助公路系统。 更新周期：AADT与CAADT流量数据每年编制并发布一次。 交通数据管理系统（Transportation Data Management System, TDMS）AADT计算帮助 交通监测项目