Traffic Crashes - Crashes

Crash data shows information about each traffic crash on city streets within the City of Chicago limits and under the jurisdiction of Chicago Police Department (CPD). Data are shown as is from the electronic crash reporting system (E-Crash) at CPD, excluding any personally identifiable information. Records are added to the data portal when a crash report is finalized or when amendments are made to an existing report in E-Crash. Data from E-Crash are available for some police districts in 2015, but citywide data are not available until September 2017. About half of all crash reports, mostly minor crashes, are self-reported at the police district by the driver(s) involved and the other half are recorded at the scene by the police officer responding to the crash. Many of the crash parameters, including street condition data, weather condition, and posted speed limits, are recorded by the reporting officer based on best available information at the time, but many of these may disagree with posted information or other assessments on road conditions. If any new or updated information on a crash is received, the reporting officer may amend the crash report at a later time. A traffic crash within the city limits for which CPD is not the responding police agency, typically crashes on interstate highways, freeway ramps, and on local roads along the City boundary, are excluded from this dataset. All crashes are recorded as per the format specified in the Traffic Crash Report, SR1050, of the Illinois Department of Transportation. The crash data published on the Chicago data portal mostly follows the data elements in SR1050 form. The current version of the SR1050 instructions manual with detailed information on each data elements is available <a href="https://idot.illinois.gov/content/dam/soi/en/web/idot/documents/transportation-system/manuals-guides-and-handbooks/safety/illinois-traffic-crash-report-sr-1050-instruction-manual-2019.pdf" target="_blank">here</a>. As per Illinois statute, only crashes with a property damage value of $1,500 or more or involving bodily injury to any person(s) and that happen on a public roadway and that involve at least one moving vehicle, except bike dooring, are considered reportable crashes. However, CPD records every reported traffic crash event, regardless of the statute of limitations, and hence any formal Chicago crash dataset released by Illinois Department of Transportation may not include all the crashes listed here. Change 11/21/2023: We have removed the RD_NO (Chicago Police Department report number) for privacy reasons.

本交通事故数据集涵盖芝加哥市行政边界内、由芝加哥警察局（CPD）管辖的城市道路上发生的每一起交通事故详情。数据直接取自芝加哥警察局的电子事故报告系统（E-Crash），已剔除所有个人身份信息。当事故报告定稿，或对E-Crash中已有报告进行修订时，相关记录将被更新至数据门户。2015年，E-Crash系统仅部分警务辖区可提供事故数据，全市范围的完整数据直至2017年9月才正式上线。全部事故报告中约半数（多为轻微事故）由涉事驾驶员在辖区警局自行提交，剩余半数则由抵达事故现场的警务人员现场记录。多数事故参数（包括道路状况、天气状况及法定限速等）由填报民警根据当时可获取的最准确信息进行记录，但部分参数可能与实际公示信息或道路状况的其他评估结果存在出入。若后续获取到某起事故的新信息或修正信息，填报民警可对事故报告进行修订。芝加哥市范围内由非CPD作为出警警务机构的交通事故（通常包括州际公路、高速匝道及市界沿线本地道路上发生的事故）未纳入本数据集。所有事故均按照伊利诺伊州交通运输厅制定的SR1050型交通事故报告格式进行记录，芝加哥数据门户发布的事故数据也基本遵循SR1050表格中的数据字段标准。包含各数据字段详细说明的最新版SR1050操作手册可<a href="https://idot.illinois.gov/content/dam/soi/en/web/idot/documents/transportation-system/manuals-guides-and-handbooks/safety/illinois-traffic-crash-report-sr-1050-instruction-manual-2019.pdf" target="_blank">在此查阅</a>。根据伊利诺伊州相关法规，仅当事故造成财产损失达1500美元及以上、或造成人员人身伤害，且发生在公共道路上并涉及至少一辆移动车辆（自行车开门事故除外）时，才属于需上报的交通事故。但芝加哥警察局会记录所有上报的交通事故事件，不受诉讼时效限制，因此伊利诺伊州交通运输厅发布的任何官方芝加哥事故数据集可能未涵盖本数据集收录的全部事故。2023年11月21日更新：出于隐私保护原因，我们已移除RD_NO字段（芝加哥警察局报告编号）。