Hourly Volumes 2013

Tabular data containing 2013 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.本数据集为表格格式，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与程控式交通计数站点的2013年小时交通量数据，该数据由各州交通部（Department of Transportation, DOT）提供给TPB。 所涉小时交通量数据均经过标准化处理，按通行方向分类列明，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量数据表，所有数据表均采用CSV（逗号分隔值）格式。 该表格数据可通过StationID字段与计数站点点图层进行关联连接。数据中还包含ABPair字段，该字段指向与计数站点关联的道路网络路段，可用于道路网络建模流程。最新的道路网络路段图层可在此处获取。请注意，道路网络图层按年份区分，历史小时交通量表中的ABPair字段值可能与当前道路网络路段数据集的ABPair字段值不匹配。 当一个计数站点关联多个道路网络路段时，交通量表将为每小时的每个路段生成一条记录。此种情况常见于两类场景：一是利用邻近站点对屏幕线路段（screenline links）开展交通量统计，二是高载客车辆（High Occupancy Vehicle, HOV）路段与多组低载客车辆（Low Occupancy Vehicle, LOV）路段相关联的区域。 请注意此细节，切勿直接对交通量表中的数据进行求和操作，以免造成重复统计。