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/Assets/uploads/files/Transportation-System/Manuals-Guides-&-Handbooks/Safety/Illinois Traffic Crash Report SR 1050 Instruction Manual 2019.pdf">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辖区内且归芝加哥警察局（Chicago Police Department, CPD）管辖的城市道路上的每一起交通事故信息。数据直接取自芝加哥警察局的电子事故报告系统（Electronic Crash Reporting System, E-Crash），以原始格式发布，已剔除所有个人可识别信息。当事故报告定稿，或对E-Crash中的已有报告进行修订时，相关记录将被同步添加至数据门户。E-Crash的相关数据自2015年起仅在部分警区开放，直至2017年9月才实现全市范围的覆盖。约半数事故报告（多为轻微事故）由涉事驾驶员前往所属警区自行申报，剩余半数则由赶赴事故现场的执勤民警现场记录。诸多事故参数（包括路面状况、天气状况及限速标志标明的车速等）由填报民警基于当时可获取的最优信息进行记录，但其中部分内容可能与实际公示信息或其他路况评估结果存在出入。若后续收到某起事故的新信息或更新内容，填报民警可在之后对事故报告进行修订。本数据集不涵盖芝加哥市辖区内由非CPD作为响应执法机构的交通事故，此类事故通常包括州际公路、高速公路匝道以及沿城市边界的本地道路上发生的事故。

所有事故均严格遵循伊利诺伊州交通运输部制定的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基本匹配SR1050表格中的数据要素。包含各数据要素详细说明的最新版SR1050操作手册可<a href="https://idot.illinois.gov/Assets/uploads/files/Transportation-System/Manuals-Guides-&-Handbooks/Safety/Illinois Traffic Crash Report SR 1050 Instruction Manual 2019.pdf">此处</a>查阅。

根据伊利诺伊州法律规定，仅当事故造成财产损失达1500美元及以上、或导致人员人身伤害、发生在公共道路上且涉及至少一辆移动车辆（不包括骑车人被开车门撞到的开门杀事故）时，才属于应申报的交通事故。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部发布的任何正式芝加哥事故数据集可能无法涵盖本数据集列出的全部事故。

2023年11月21日更新：出于隐私保护原因，我们已移除RD_NO（芝加哥警察局报告编号）字段。