ThatCarHitMe.com
An Injuria.ai Company
YEAR-OVER-YEAR CRASH REPORT · CHICAGO, IL · JUNE 2018
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-2018-report
Monthly Traffic Safety Analysis
10,602 CRASHES IN
CHICAGO, IL
JUNE 2018
In June 2018, Chicago experienced 10602 total crashes, a substantial increase from 6212 crashes in June 2017. This represents a 70.67% rise in total crash incidents year-over-year. The most notable shift was a 153.88% increase in total injuries, rising from 787 to 1998.
10,602
▲ 70.7%was 6,212
Total Crash Events
11
▲ 22.2%was 9
Persons Killed
1,998
▲ 153.9%was 787
Persons Injured
2,798
▲ 67.9%was 1,666
Hit-and-Run Crashes
Note: "Persons Killed" (11) counts individual fatalities across all crash events. "Fatal" in the severity table below (10) 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 · 2018-06-01 to 2018-06-30 · Aggregate counts from crash, person, and vehicle records
Trend Summary
The overall trend indicates a significant increase in traffic safety incidents in June 2018 compared to June 2017. Total crashes rose by 70.67%, from 6212 to 10602. Concurrently, total fatalities increased by 22.22% (from 9 to 11), and total injuries saw a substantial 153.88% increase, from 787 to 1998.
2,798
Hit-and-Run Crashes — June 2018
▲ 67.9% vs prior (1,666)
The number of hit-and-run crashes increased by 67.95%, rising from 1666 in June 2017 to 2798 in June 2018. Despite this increase in count, the overall hit-and-run rate relative to total crashes slightly decreased from 26.8% in June 2017 to 26.4% in June 2018.
Vulnerable Road User Casualties
1
Pedestrians Killed
1
Cyclists Killed
8
Motorists Killed
1
Other Killed
229
Pedestrians Injured
170
Cyclists Injured
1,599
Motorists Injured
0
Other Injured
Source: Chicago Traffic Crashes · Socrata Open Data · 2018-06-01 to 2018-06-30 · Mode classified from person records (driver/passenger → motorist; pedestrian; bicyclist → cyclist; in-line skater / unspecified → other)
When Crashes Happen
The temporal patterns for crashes remained consistent, with Friday continuing to be the peak day for incidents in both June 2018 (2029 crashes) and June 2017 (1149 crashes). The peak hour for crashes also remained 4 p.m. in both periods, with 826 crashes in June 2018 and 586 crashes in June 2017. All days of the week and hours of the day experienced increased crash counts year-over-year.
Source: Chicago Traffic Crashes · Socrata Open Data · 2018-06-01 to 2018-06-30 · Crash date field aggregated by weekday
Source: Chicago Traffic Crashes · Socrata Open Data · 2018-06-01 to 2018-06-30 · Crash time field aggregated by hour (0-23)
Crash Severity Breakdown
While the fatal crash rate decreased slightly from 0.11% in June 2017 to 0.09% in June 2018, the number of fatal crashes increased by 42.86%, from 7 to 10. All injury severity categories saw significant increases in both counts and their proportion of total crashes. Serious injury crashes (A) increased from 66 (1.1% share) to 193 (1.8% share), minor injury crashes (B) from 284 (4.6% share) to 873 (8.2% share), and possible injury crashes (C) from 197 (3.2% share) to 420 (4% share).
Severity is per crash event (most severe injury). 10 fatal crash events resulted in 11 persons killed.
Outcome by Severity (Crash Events)
Source: Chicago Traffic Crashes · Socrata Open Data · 2018-06-01 to 2018-06-30 · KABCO injury classification scale
Severity Distribution
Source: Chicago Traffic Crashes · Socrata Open Data · 2018-06-01 to 2018-06-30 · Most severe injury per crash record
Top Contributing Factors
All top contributing factors showed significant increases in crash counts year-over-year. "FAILING TO YIELD RIGHT-OF-WAY" increased by 596 crashes (94.9% increase), becoming the top factor in June 2018 with 1224 incidents, up from 628. "FOLLOWING TOO CLOSELY" also saw a substantial rise of 388 crashes (50.85% increase), moving from the top factor in June 2017 with 763 incidents to the second position in June 2018 with 1151 incidents. "IMPROPER OVERTAKING/PASSING" increased by 253 crashes (92% increase), from 275 to 528, and "IMPROPER BACKING" increased by 182 crashes (58.15% increase), from 313 to 495.
Officer-Reported Primary Contributing Cause
Source: Chicago Traffic Crashes · Socrata Open Data · 2018-06-01 to 2018-06-30 · Officer-reported primary contributory cause per crash
Road & Environmental Conditions
There was a notable shift in the conditions under which crashes occurred. The share of crashes in "CLEAR" weather decreased from 89.7% in June 2017 to 81.2% in June 2018, while crashes in "RAIN" increased significantly from 287 to 1218, raising its share from 4.6% to 11.5%. Similarly, crashes on "DRY" road surfaces decreased in share from 87.5% to 79.7%, with crashes on "WET" surfaces increasing from 391 to 1491, raising its share from 6.3% to 14.1%.
Weather
Source: Chicago Traffic Crashes · Socrata Open Data · 2018-06-01 to 2018-06-30 · Weather condition at time of crash
Lighting
Source: Chicago Traffic Crashes · Socrata Open Data · 2018-06-01 to 2018-06-30 · Lighting condition field
Road Surface
Source: Chicago Traffic Crashes · Socrata Open Data · 2018-06-01 to 2018-06-30 · Road surface condition field
Vehicles & Demographics
The total number of vehicles involved in crashes increased by 72.19%, from 12584 in June 2017 to 21668 in June 2018. Pedestrian involvement in crashes saw a 152.4% increase (from 103 to 260), and bicycle involvement increased by 147.9% (from 96 to 238). The top three vehicle makes involved in crashes, Chevrolet, Toyota, and Ford, maintained their rankings, all experiencing significant increases in counts of involved vehicles.
Top Vehicle Makes (21,668 vehicles)
Source: Chicago Traffic Crashes · Socrata Open Data · 2018-06-01 to 2018-06-30 · Vehicle unit records
6,745 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 (23,474 persons with recorded sex)
Source: Chicago Traffic Crashes · Socrata Open Data · 2018-06-01 to 2018-06-30 · Person-level records linked to crash events
Speed Limit Zones
Crashes in the 30 mph speed zone increased by 3246 incidents (70.85%), from 4581 to 7827, maintaining its dominant share of total crashes with speed limit data at approximately 73.8%. While fatalities in the 30 mph zone increased from 6 to 7, the fatal crash rate within this zone decreased from 0.131% to 0.089%. Crashes in the 25 mph zone increased by 354 incidents (115.7%), rising from 306 to 660, and saw an increase in fatalities from 0 to 1.
Fatal crashes by zone: 20 mph: 1 of 393 (0.254%) · 25 mph: 1 of 660 (0.152%) · 30 mph: 7 of 7,827 (0.089%)
Source: Chicago Traffic Crashes · Socrata Open Data · 2018-06-01 to 2018-06-30 · 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: 2018-06-01 through 2018-06-30
- Report generated: June 1, 2026
Data Coverage
- Reporting period: 2018-06-01 through 2018-06-30 (30 days)
- Geographic scope: Chicago, IL
- Total crash records analyzed: 10,602
- Total persons involved: 23,760
- Total vehicles involved: 21,668
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-2018-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: 2018-06-01 – 2018-06-30
Generated: June 1, 2026 · All rights reserved