ThatCarHitMe.com
An Injuria.ai Company
YEAR-OVER-YEAR CRASH REPORT · CHICAGO, IL · JUNE 2023
Purpose: Machine-readable JSON endpoint for AI agents, LLMs, researchers, and programmatic consumers. Returns all underlying crash data and AI-generated commentary without HTML.
Authentication: None required. Public endpoint.
GET: https://thatcarhitme.com/api/crash-data/reports/data/illinois/chicago/june-2023-report
Monthly Traffic Safety Analysis
9,590 CRASHES IN
CHICAGO, IL
JUNE 2023
In June 2023, Chicago experienced 9,590 crashes, a slight decrease of 0.1% from the 9,602 crashes reported in June 2022. The most significant year-over-year shift was a 75.0% increase in total fatalities, rising from 8 in June 2022 to 14 in June 2023. This notable increase in fatalities occurred despite a minor reduction in overall crash incidents.
9,590
▼ -0.1%was 9,602
Total Crash Events
14
▲ 75.0%was 8
Persons Killed
2,136
▼ -4.0%was 2,225
Persons Injured
2,986
▼ -2.5%was 3,062
Hit-and-Run Crashes
Note: "Persons Killed" (14) counts individual fatalities across all crash events. "Fatal" in the severity table below (13) counts crash events where at least one fatality occurred. A single crash can result in multiple fatalities. 19 crashes with unreported severity are not shown in the severity breakdown.
Source: Chicago Traffic Crashes · Socrata Open Data · 2023-06-01 to 2023-06-30 · Aggregate counts from crash, person, and vehicle records
Trend Summary
The overall trend for total crashes in Chicago remained relatively stable year-over-year, with a minor decrease of 0.1% from 9,602 crashes in June 2022 to 9,590 crashes in June 2023. However, total fatalities increased by 75.0%, from 8 to 14, indicating a worsening outcome for crash severity. Conversely, total injuries decreased by 4.0%, from 2,225 to 2,136.
2,986
Hit-and-Run Crashes — June 2023
▼ -2.5% vs prior (3,062)
The number of hit-and-run crashes decreased by 2.5%, from 3,062 in June 2022 to 2,986 in June 2023. Correspondingly, the hit-and-run rate slightly decreased from 31.9% to 31.1% year-over-year.
Vulnerable Road User Casualties
0
Pedestrians Killed
1
Cyclists Killed
13
Motorists Killed
0
Other Killed
239
Pedestrians Injured
198
Cyclists Injured
1,693
Motorists Injured
6
Other Injured
Source: Chicago Traffic Crashes · Socrata Open Data · 2023-06-01 to 2023-06-30 · Mode classified from person records (driver/passenger → motorist; pedestrian; bicyclist → cyclist; in-line skater / unspecified → other)
When Crashes Happen
The peak day for crashes shifted from Thursday in June 2022, with 1,586 incidents, to Friday in June 2023, with 1,736 incidents. The peak hour remained consistent at 4 p.m. for both periods, though the number of crashes at this hour slightly decreased from 796 in June 2022 to 789 in June 2023.
Source: Chicago Traffic Crashes · Socrata Open Data · 2023-06-01 to 2023-06-30 · Crash date field aggregated by weekday
Source: Chicago Traffic Crashes · Socrata Open Data · 2023-06-01 to 2023-06-30 · Crash time field aggregated by hour (0-23)
Crash Severity Breakdown
Fatal crashes increased significantly by 62.5%, from 8 in June 2022 to 13 in June 2023, leading to a 75.0% rise in the fatal crash rate from 0.08% to 0.14%. Conversely, crashes resulting in minor injuries decreased by 7.7% (from 943 to 870), and possible injuries decreased by 6.7% (from 420 to 392). Crashes with no injuries saw a slight increase of 1.3%, from 8,003 to 8,104.
Severity is per crash event (most severe injury). 13 fatal crash events resulted in 14 persons killed.
Outcome by Severity (Crash Events)
Source: Chicago Traffic Crashes · Socrata Open Data · 2023-06-01 to 2023-06-30 · KABCO injury classification scale
Severity Distribution
Source: Chicago Traffic Crashes · Socrata Open Data · 2023-06-01 to 2023-06-30 · Most severe injury per crash record
Top Contributing Factors
Failing to Yield Right-of-Way remained the top contributing factor, increasing by 53 crashes, a 4.9% rise, from 1,076 to 1,129 incidents. Following Too Closely saw a decrease of 18 crashes, or 2.1%, from 853 to 835. Notably, crashes attributed to Operating Vehicle in Erratic, Reckless, Careless, Negligent or Aggressive Manner increased by 13 incidents, representing a 10.6% change, from 123 to 136.
Officer-Reported Primary Contributing Cause
Source: Chicago Traffic Crashes · Socrata Open Data · 2023-06-01 to 2023-06-30 · Officer-reported primary contributory cause per crash
Road & Environmental Conditions
Crashes occurring in clear weather conditions decreased by 4.2%, from 8,413 to 8,062, while crashes during rain increased by 26.1%, from 394 to 497. Similarly, crashes on dry road surfaces decreased by 2.8%, from 8,064 to 7,836, but crashes on wet road surfaces increased by 21.3%, from 508 to 616. Crashes in daylight conditions decreased by 4.7%, from 7,041 to 6,710, while those in darkness on lighted roads increased by 4.7%, from 1,501 to 1,571.
Weather
Source: Chicago Traffic Crashes · Socrata Open Data · 2023-06-01 to 2023-06-30 · Weather condition at time of crash
Lighting
Source: Chicago Traffic Crashes · Socrata Open Data · 2023-06-01 to 2023-06-30 · Lighting condition field
Road Surface
Source: Chicago Traffic Crashes · Socrata Open Data · 2023-06-01 to 2023-06-30 · Road surface condition field
Vehicles & Demographics
The total number of vehicles involved in crashes increased by 2.2%, from 19,559 in June 2022 to 19,987 in June 2023. The age group 65+ saw the largest percentage increase in persons involved in crashes, rising by 4.7% from 1,146 to 1,200. Toyota remained the most common vehicle make involved in crashes, increasing by 9.5% from 2,130 to 2,332, while Chevrolet, the second most common, decreased by 2.3% from 2,123 to 2,075.
Top Vehicle Makes (19,987 vehicles)
Source: Chicago Traffic Crashes · Socrata Open Data · 2023-06-01 to 2023-06-30 · Vehicle unit records
6,780 persons with unknown or unrecorded age excluded from age chart. Age=0 in Chicago records is a sentinel for unknown/unrecorded age (not infants) and is grouped with nulls.
Sex Distribution (21,127 persons with recorded sex)
Source: Chicago Traffic Crashes · Socrata Open Data · 2023-06-01 to 2023-06-30 · Person-level records linked to crash events
Speed Limit Zones
Crashes in the 30 mph speed limit zone increased by 2.0%, from 7,024 to 7,162, and fatalities in this zone doubled from 5 to 10. Conversely, crashes in the 25 mph zone decreased by 15.4%, from 669 to 566, with fatalities in this zone dropping from 2 to 0. The 15 mph speed limit zone saw an increase of 16 crashes, a 4.7% rise, and a shift from 0 fatalities to 1 fatality.
Fatal crashes by zone: 15 mph: 1 of 355 (0.282%) · 20 mph: 1 of 403 (0.248%) · 30 mph: 10 of 7,162 (0.14%) · 35 mph: 1 of 629 (0.159%)
Source: Chicago Traffic Crashes · Socrata Open Data · 2023-06-01 to 2023-06-30 · Posted speed limit at crash location
Data Sources & Methodology
Primary Data Source
All crash data in this report is sourced from Chicago Traffic Crashes, accessed programmatically via the Socrata Open Data API (SODA). This dataset contains official police-reported motor vehicle traffic crash records maintained by the reporting jurisdiction's law enforcement agency. Records are published to the open data portal by the municipality and are subject to the portal's terms of use.
Data Retrieval
- Access method: Socrata Open Data API (SoQL queries)
- Data format: Structured JSON via REST API
- Record types queried: Crash events, person records, and vehicle unit records
- Date filter applied: 2023-06-01 through 2023-06-30
- Report generated: June 1, 2026
Data Coverage
- Reporting period: 2023-06-01 through 2023-06-30 (30 days)
- Geographic scope: Chicago, IL
- Total crash records analyzed: 9,590
- Total persons involved: 21,548
- Total vehicles involved: 19,987
Analytical Methodology
- Severity classification: Uses the KABCO injury scale (K=Fatal, A=Incapacitating injury, B=Non-incapacitating injury, C=Possible injury, O=No injury/property damage only), the standard classification in U.S. Model Minimum Uniform Crash Criteria (MMUCC). Severity is assigned per crash event based on the most severe injury in that crash. A single fatal crash (K) may involve multiple fatalities; therefore the "Persons Killed" count in the headline KPIs may differ from the "Fatal" crash count in the severity breakdown.
- Contributing factors: Reflect the officer-determined primary contributory cause recorded at the time of the crash report. These are preliminary determinations and may not reflect final investigation findings.
- Hit-and-run classification: Based on the hit-and-run indicator field in the official crash report, as determined by the responding officer at the scene.
- Temporal analysis: Day-of-week and hour-of-day distributions are computed from the crash date/time timestamp in each record.
- Demographics: Age and sex distributions are drawn from person-level records linked to each crash event. A single crash may involve multiple persons.
- Vehicle data: Make information is drawn from vehicle unit records linked to each crash event.
- AI commentary: Narrative sections are generated by Google Gemini (large language model) based on the structured data. Commentary is descriptive, not predictive, and should not be interpreted as expert opinion.
Limitations & Disclaimers
- Only crashes reported to and documented by law enforcement are included. Minor incidents, unreported crashes, and near-misses are not captured in this dataset.
- Data reflects conditions at the time of the initial police report and may be subject to subsequent corrections, reclassifications, or supplements by the reporting agency.
- Open data portal records may experience a publication lag - recently occurring crashes may not yet appear in the dataset at the time of report generation.
- AI-generated commentary is produced by a large language model and is intended to highlight patterns in the data. It does not constitute legal, medical, or professional analysis.
- Percentages are calculated from reported data and are subject to rounding.
Non-Affiliation Disclosure
This report is produced independently by ThatCarHitMe.com (Injuria.ai). It is not affiliated with, endorsed by, or produced in partnership with any law enforcement agency, municipal government, state department of transportation, or the National Highway Traffic Safety Administration (NHTSA). Data is sourced from publicly available government open data portals.
Data License
The underlying crash data is provided under the municipality's Open Data Terms of Use and is made available to the public for unrestricted use. This analysis and report is © 2026 Injuria.ai and may be cited with attribution using the suggested citation below.
Corrections & Feedback
If you believe any data in this report is inaccurate or have questions about our methodology, please contact: data@injuria.ai. We are committed to accuracy and will issue corrections promptly.
Suggested Citation
ThatCarHitMe.com (Injuria.ai). "Chicago, IL Crash Intelligence Report." Published June 1, 2026. Data source: Chicago Traffic Crashes, Socrata Open Data. Available at: https://thatcarhitme.com/crash-data/illinois/chicago/june-2023-report
About the Publisher
ThatCarHitMe.com is a crash data intelligence platform developed by Injuria.ai, a legal technology company specializing in traffic safety analytics. We aggregate and analyze publicly available government crash data to produce structured intelligence reports for communities, researchers, journalists, and legal professionals. Our reports combine programmatic data retrieval from official open data portals with AI-assisted narrative analysis.
Questions about this report's data or methodology: data@injuria.ai
ThatCarHitMe.com · An Injuria.ai Company
ThatCarHitMe.com
An Injuria.ai Company
Crash Data Intelligence
Data: Chicago Traffic Crashes · Socrata
Period: 2023-06-01 – 2023-06-30
Generated: June 1, 2026 · All rights reserved