Hourly Volumes 2014

Tabular data containing 2014 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2014年小时级交通流量统计表格数据，源自哥伦比亚特区、马里兰州及弗吉尼亚州的连续式与项目式计数站点，相关数据由各州交通部（Department of Transportation, DOT）提供给TPB。该小时级流量统计数据已完成预处理，按通行方向分列，并与对应的定向路网链路完成匹配。各州均提供独立的交通流量数据表，格式为逗号分隔值（Comma-Separated Values, CSV）。该表格数据可通过站点ID（StationID）字段与点类型计数站点图层进行关联。数据中还包含ABPair字段，该字段指向与计数站点关联的路网链路，可用于路网建模流程。最新的路网链路图层可在此处获取。请注意，路网图层具有年份属性，历史小时流量数据表中的ABPair字段值可能与当前路网链路数据集中的ABPair字段值不匹配。当单个计数站点关联多条路网链路时，流量数据表将为每小时的每条链路生成一条记录。这种情况常见于两种场景：一是使用邻近站点对筛检线链路进行流量统计，二是当高载客车辆（High Occupancy Vehicle, HOV）链路与多组低载客车辆（Low Occupancy Vehicle, LOV）链路关联时。此细节需格外留意，切勿对流量数据表中的统计值进行求和，否则将导致重复计数。