Parking Violations Summary for 2009 - Weeks 1 to 26

The Vision Zero data contained in this layer pertain to parking violations issued by the District of Columbia's Metropolitan Police Department (MPD)and partner agencies with the authority to do so. For example, the District Department of Transportation's (DDOT) traffic control officers who prevent congestion through enforcement and control at intersections throughout the District. Locations of moving violations are identified from a database provided by the District Department of Motor Vehicles (DMV). The data is summarized by ticket counts based on time of day, week of year, year, and category of violation. The summary form was created as a series of aggregated street segment data, in order to view spatial patterns on a weekly basis. This is a temporal crosstab of violation types (defined below) by week and time of day (ranges defined below). Users are able to query by week to get a DC-wide yearly and weekly perspective on over 50 different combinations of violations. Create interesting street segment heat maps which can get quite specific to identify patterns and answer questions. For example, what type of parking violations occurred the most in the time period of this data? These data will give up to 26 distinct street segments of information – one for each week of the half year. Important Notes: Records which could not be associated to a street centerline segment were excluded from these summaries. Records which do not have a time of day associated with the violation were excluded from these summaries.本图层所收录的零愿景（Vision Zero）数据集，涵盖哥伦比亚特区大都会警察局（Metropolitan Police Department, MPD）及具备执法权限的合作机构开具的停车违章罚单。例如特区交通运输局（District Department of Transportation, DDOT）的交通管控警员，他们通过在特区全域各交叉口开展执法与管控来缓解交通拥堵。移动违章的点位信息源自特区机动车辆管理局（District Department of Motor Vehicles, DMV）提供的数据库。该数据集依据每日时段、年度周次、年份及违章类别统计罚单数量。为便于按周度查看空间分布特征，统计结果以聚合后的街道段数据形式产出，其本质为按周度与每日时段（时段范围详见下文）生成的违章类型（定义详见下文）时间交叉表。用户可通过周度维度进行查询，从而获取特区全域范围内超50种违章组合的年度与周度分析视角，还可生成精度精细的街道段热力图，用于识别规律、解答相关疑问。例如：在本次数据覆盖的时段内，哪种停车违章的发生频次最高？本数据集最多可提供半年度每周对应的26条独立街道段信息。重要说明：本统计未纳入无法关联至街道中心线段的记录，以及未附带违章发生时段的记录。