Hourly Volumes 2022

Tabular data containing 2022 hourly traffic counts from continuous and program count stations in the District of Columbia, Maryland, and Virginia that are provided to TPB by the respective state DOTs. The hourly counts are processed, listed by direction, and also matched to the appropriate directional network link. Separate traffic volume tables are provided for each state. The tables are in CSV format. This tabular data can be joined to the Count Stations layer (point) by the StationID field. The data also contains the field ABPair that refers to the network link which is associated with the count station in order to be used in the network modeling process. The latest network link layer can be found here. Note that network layers are year-specific; ABPair on historical hourly volume tables may not match the ABPair on the current network link dataset. In cases where a count station is associated with more than one network link, the volume tables will contain one record for each link for each hour. This situation occurs where nearby stations are used for counts on screenline links and also in areas where one set of high occupancy vehicle (HOV) links is associated with multiple sets of low occupancy vehicle (LOV) links. This is important to note, so that counts in the volume tables are not summed which would result in double counting.本数据集包含美国哥伦比亚特区、马里兰州及弗吉尼亚州境内连续式计数站与程控式计数站的2022年小时交通流量数据，相关数据由各州交通运输部门（DOT）提供给TPB。小时流量数据已完成预处理，按行车方向分列，并与对应的定向道路网络路段完成匹配。各州均提供独立的交通流量数据表，格式为CSV。该表格数据可通过StationID字段与计数站点要素图层进行关联。数据中还包含ABPair字段，该字段指向与计数站关联的道路网络路段，可用于网络建模流程。最新的道路网络图层可在此处获取。请注意，道路网络图层为年度专属版本；历史小时流量数据表中的ABPair字段值，可能与当前道路网络数据集的ABPair字段值无法匹配。当一个计数站关联多条网络路段时，流量数据表将为每小时的每条路段生成一条记录。这种情况常见于两类场景：一是为屏幕线路段计数设置的邻近站点，二是一条或多条高占用率车辆（High Occupancy Vehicle，HOV）路段关联多组低占用率车辆（Low Occupancy Vehicle，LOV）路段的区域。请注意该细节，切勿直接对流量数据表中的计数结果求和，否则将导致重复计数。