ThatCarHitMe.com
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CRASH INTELLIGENCE REPORT · DAYTON, OH · 2021
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/ohio/dayton/2021-annual-report
Yearly Traffic Safety Analysis
4,490 CRASHES IN
DAYTON, OH
2021
In Dayton, OH during 2021, there were a total of 4490 crashes, resulting in 24 fatalities and 1975 injuries. A significant finding is that 34.5% of all crashes, totaling 1547 incidents, were reported as hit-and-run events. This data provides a foundational understanding of traffic safety outcomes in the city for the specified period.
4,490
Total Crash Events
24
Persons Killed
1,975
Persons Injured
34.5%
Hit-and-Run Rate
Note: "Persons Killed" (24) counts individual fatalities across all crash events. "Fatal" in the severity table below (22) counts crash events where at least one fatality occurred. A single crash can result in multiple fatalities.
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Aggregate counts from crash, person, and vehicle records
1,547
Hit-and-Run Crashes — 2021
Hit-and-run incidents constituted a notable portion of crashes in Dayton, OH during 2021, with 1547 crashes identified as hit-and-run, representing 34.5% of all reported incidents. It is important to note that the hit-and-run status is based on the initial determination made by the responding officer at the scene.
Vulnerable Road User Casualties
In 2021, 24 persons were killed and 1975 were injured in Dayton crashes. Pedestrians were a particularly vulnerable group, with 5 fatalities and 73 injuries reported. Motorists experienced the highest numbers, with 19 fatalities and 1902 injuries, while no cyclists were reported killed or injured.
5
Pedestrians Killed
19
Motorists Killed
73
Pedestrians Injured
1,902
Motorists Injured
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Mode classified from person records (driver/passenger → motorist; pedestrian; bicyclist → cyclist; in-line skater / unspecified → other)
When Crashes Happen
Crashes in Dayton, OH showed distinct temporal patterns in 2021, with the highest number of incidents occurring on Fridays, totaling 728 crashes. The peak hour for crashes was 4 PM, recording 380 incidents. A majority of crashes, 2842, happened during daylight hours, while 1422 occurred in dark conditions.
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Crash date field aggregated by weekday
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Crash time field aggregated by hour (0-23)
Crash Severity Breakdown
Of the 4490 crashes in 2021, 68.6% (3082 incidents) resulted in no reported injuries, indicating property-damage-only events. Injury crashes, encompassing serious, minor, and possible injuries, accounted for 30.9% of all incidents. There were 22 fatal crashes, which led to 24 individual fatalities, illustrating that some fatal crashes involved multiple deaths.
Severity is per crash event (most severe injury). 22 fatal crash events resulted in 24 persons killed.
Outcome by Severity (Crash Events)
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · KABCO injury classification scale
Severity Distribution (Crash Events)
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Most severe injury per crash record
Road & Environmental Conditions
The majority of crashes in Dayton, OH during 2021 occurred under optimal conditions, with 2975 crashes in clear weather, 3489 on dry road surfaces, and 2842 during daylight. However, adverse conditions were still a factor in a significant number of incidents. Approximately 15.1% of crashes (680) occurred in rain, snow, or other precipitation, and 21.6% (971) happened on wet, snowy, or icy roads.
Weather
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Weather condition at time of crash
Lighting
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Lighting condition field
Road Surface
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Road surface condition field
Vehicles & Demographics
Among the 10715 persons involved in crashes, the 26-34 age group was most represented with 1866 individuals. Passenger Cars were the most frequently involved vehicle type, accounting for 4956 vehicles. Chevrolet vehicles were involved in the highest number of incidents, totaling 1539, followed by Ford with 1035 incidents.
Top Vehicle Makes (8,785 vehicles)
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Vehicle unit records
1,438 persons with unknown or unrecorded age excluded from age chart.
Sex Distribution (9,577 persons with recorded sex)
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Person-level records linked to crash events
Crash Location (First Harmful Event)
The majority of crashes in Dayton, OH during 2021, totaling 4033 incidents, occurred on the roadway. Crashes where the first harmful event happened off the main travel lanes, specifically on the roadside, shoulder, or in the median, accounted for 332 incidents. This indicates that approximately 7.4% of crashes involved a run-off-road component.
Crash Location (First Harmful Event)
"Other" combines 6 smaller categories (31 records): Driveway/Alley access (13), On ramp (12), Bike Lane (2), On Gore (2), Crossover (1), Railway grade crossing (1).
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Crash-level records
Traffic Control Device
Among vehicles involved in crashes, 'No Control' was the most frequent traffic control type, associated with 5237 instances. Vehicles involved at signalized locations accounted for 2653 instances, representing 30.6% of the total. Conversely, vehicles involved at uncontrolled locations (including 'No Control', 'Stop Sign', 'Yield Sign', 'Flasher', and 'Roundabout') totaled 6029 instances, or 69.4%.
Traffic Control Device
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Vehicle unit records
Driver Contributing Factor
Analysis of contributing factors for units involved in crashes reveals that 'Following too Close / ACDA' was the most common, accounting for 920 instances, or 22.5% of reported factors. 'Other Improper Action' followed with 798 instances (19.5%), and 'Failure to Yield' was cited in 709 instances (17.3%). These three factors collectively represent the leading improper actions contributing to crashes.
Driver Contributing Factor
Showing top 9 of 22 reported. 13 additional (559 total) not shown: Improper Turn, Improper Backing, Left of Center, Swerving to Avoid, Improper Passing, Improper Crossing, Operating Defective Equipment, Wrong Way, Load shifting/Falling/Spilling, Vision Obstruction, Stopped or Parked Illegally, Opening Door into Roadway, Improper Start From a Parked Position.
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Vehicle unit records
Commercial / Truck Involvement
Crashes involving commercial vehicles in Dayton, OH during 2021 totaled 206 incidents, representing 4.6% of all crashes. Of these, 135 involved Semi-Tractor Trailers, and 71 involved Other Commercial Vehicles.
Vulnerable Road Users & Motorcycles
In 2021, crashes involving vulnerable road users in Dayton, OH totaled 103 incidents for pedestrians and bicyclists combined. This represents 2.3% of all crashes. Pedestrians were involved in 79 crashes, while bicyclists were involved in 24 crashes.
Impairment (Alcohol / Drugs)
Impaired driving was a factor in 203 crashes in Dayton, OH during 2021, accounting for 4.5% of all incidents. Alcohol impairment was identified in 116 crashes, while both alcohol and drugs were present in 48 crashes. Drugs alone were a factor in 39 crashes.
Driver Condition
While most drivers involved in crashes were apparently normal, a total of 225 drivers were reported with abnormal conditions. The most common abnormal condition was 'Under the Influence of Medications / Drugs / Alcohol' with 150 instances. Other conditions included 'Physical Impairment' (32 instances) and drivers who 'Fell Asleep; Fainted; Fatigued; etc.' (22 instances), collectively representing 3.1% of all drivers with reported conditions.
Driver Condition
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Person-level records linked to crash events
Driver Distraction
Driver distraction was identified in 231 instances, representing 3.2% of drivers with reported distraction status. The most frequent specific distractions included 'Other distraction inside the vehicle' (76 instances) and 'Other distraction outside the vehicle' (70 instances). Manually operating an electronic communication device was reported in 31 instances.
Driver Distraction
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Person-level records linked to crash events
Road Alignment
Roadway alignment played a role in crashes during 2021, with 343 crashes occurring on curves, representing 7.7% of incidents with reported alignment. Additionally, 658 crashes occurred on grades, accounting for 14.7% of incidents. The majority of crashes, 3639, occurred on straight, level roads.
Road Alignment
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Crash-level records
Pre-Crash Driver Action
The most common pre-crash action for units involved in crashes was 'Straight Ahead,' accounting for 4613 instances, or 55.1% of reported actions. 'Slowing or Stopped In Traffic' was the second most frequent action with 989 instances (11.8%). Being 'Parked' was the third most common, reported in 802 instances (9.6%).
Pre-Crash Driver Action
Showing top 9 of 19 reported. 10 additional (293 total) not shown: Overtaking/Passing, Entering Traffic Lane, Walking; Running; Jogging; Playing, Leaving Traffic Lane, Making U-Turn, Entering or Crossing Specified Location, Driverless, Other Non-Motorist, Standing, Approaching or Leaving Vehicle.
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Vehicle unit records
Manner of Collision
The dominant manner of collision in Dayton, OH during 2021 was 'Angle' crashes, accounting for 1401 incidents, or 31.2% of the total. 'Not Collision Between Two Vehicles in Transport' was the second most frequent, with 1118 incidents (24.9%). Rear-end collisions also formed a significant portion, totaling 1021 incidents (22.7%).
Manner of Collision
"Other" combines 2 smaller categories (74 records): Backing (63), Rear-to-rear (11).
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Crash-level records
Vehicle Type
Passenger Cars were the predominant vehicle type involved in crashes, with 4956 instances. Sport Utility Vehicles and Pickups were also frequently involved, with 1676 and 765 instances respectively. Commercial vehicles, including Semi-Tractors, Cargo Vans, Single Unit Trucks, and Buses, collectively accounted for 397 vehicles, representing 4.5% of all vehicles involved.
Vehicle Type
"Other" combines 15 smaller categories (413 records): Pedestrian/Skater (81), Other Vehicle (61), Motorcycle 2 Wheeled (59), Single Unit Truck (58), Bus (16+ Passengers) (54), Van (9-15 Seats) (34), Heavy Equipment (25), Bicycle (24), Moped or Motorized Bicycle (6), All Terrain Vehicle (ATV/UTV) (5), Motorhome (2), Train (1), Golf Cart (1), Farm Equipment (1), Wheelchair (Any type) (1).
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Vehicle unit records
Person Type
Drivers constituted the largest group of persons involved in crashes, with 7885 individuals. Occupants (passengers) represented 2747 individuals. Pedestrians accounted for 83 individuals, making up 0.8% of all persons involved.
Person Type
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Crash-level records
Person Injury Severity
Among all persons involved in crashes, 24 individuals sustained fatal injuries, representing 0.22% of the total. A total of 1975 individuals sustained some level of injury, including 120 serious injuries, 980 minor injuries, and 875 possible injuries. The vast majority, 7976 persons, sustained no injuries.
Person Injury Severity
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Crash-level records
Occupant Safety Equipment
For motor-vehicle occupants, the use of 'Shoulder and Lap Belt Used' was reported in 6896 instances. However, 521 individuals, representing 6.5% of those with known safety equipment use, were reported as using 'None Used'. Additionally, 264 individuals used 'Shoulder Belt Only Used'.
Occupant Safety Equipment
"Other" combines 3 smaller categories (51 records): Lap Belt Only Used (29), Helmet Used (21), Lighting - Pedestrian / Bicycle Only (1).
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Person-level records linked to crash events
Vehicles Per Crash
The majority of crashes in 2021 involved two vehicles, totaling 3328 incidents. Single-vehicle crashes accounted for 733 incidents, representing 16.3% of all crashes. There were also a small number of larger multi-vehicle incidents, with 3 crashes involving 6 vehicles and 1 crash involving 7 vehicles.
Vehicles Per Crash
Source: Ohio Crash Data (ODOT TIMS) · Csv Open Data · 2021-01-01 to 2021-12-31 · Crash-level records
Data Sources & Methodology
Primary Data Source
All crash data in this report is sourced from Ohio Crash Data (ODOT TIMS), accessed programmatically via the Csv 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: Csv 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: 2021-01-01 through 2021-12-31
- Report generated: July 6, 2026
Data Coverage
- Reporting period: 2021-01-01 through 2021-12-31 (365 days)
- Geographic scope: Dayton, OH
- Total crash records analyzed: 4,490
- Total persons involved: 10,715
- Total vehicles involved: 8,785
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). "Dayton, OH Crash Intelligence Report: 2021." Published July 6, 2026. Reporting period: 2021-01-01 to 2021-12-31. Data source: Ohio Crash Data (ODOT TIMS), Csv Open Data. Available at: https://thatcarhitme.com/crash-data/ohio/dayton/2021-annual-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: Ohio Crash Data (ODOT TIMS) · Csv
Period: 2021-01-01 – 2021-12-31
Generated: July 6, 2026 · All rights reserved