Parking Violations Summary for 2012 - Weeks 27 to 52

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.本图层所包含的零愿景（Vision Zero）数据集，涉及美国哥伦比亚特区大都会警察局（Metropolitan Police Department, MPD）及具备相应执法权限的合作机构开具的停车违章罚单。例如，哥伦比亚特区交通运输局（District Department of Transportation, DDOT）的交通管制警员，负责在特区全域各交叉口开展执法与交通管控以缓解拥堵。动态违章的点位信息取自哥伦比亚特区机动车辆管理局（District Department of Motor Vehicles, DMV）提供的数据库。该数据集按照单日时段、年度周次、年份及违章类别，以罚单计数维度进行汇总。为便于按周度视角分析空间分布模式，汇总形式采用聚合后的街道路段数据构建。本数据集为按周度与单日时段（时段范围详见下文）划分的违章类型（定义详见下文）的时间交叉表。用户可按周度进行查询，以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。可生成精细化的街道路段热力图，用于识别分布规律并解答相关问题，例如：在本次数据覆盖的时段内，哪类停车违章的发生频次最高？本数据集可提供最多26条独立街道路段的信息——对应半年内的每一个周次。重要说明：无法关联至街道中心线路段的记录，以及未附带违章发生时段的记录，均已从本次汇总数据中剔除。