Fatal Crashes Only
This report covers fatal crashes only, from the NHTSA Fatality Analysis Reporting System — the federal census of every crash on a US public road that killed someone within 30 days. It does not include injury or property-damage-only crashes, and its totals are not comparable with the all-severity crash reports published elsewhere on this site.
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YEAR-OVER-YEAR CRASH REPORT · CONNECTICUT · SEPTEMBER 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.
Monthly Traffic Safety Analysis
24 CRASHES IN
CONNECTICUT
SEPTEMBER 2023
In September 2023, Connecticut experienced 24 fatal crashes, a 4.35% increase compared to the 23 fatal crashes in September 2022. Total fatalities decreased slightly by 3.85%, from 26 to 25. The most notable year-over-year shift was an 85.7% increase in fatal crashes involving DUI, rising from 7 in the prior period to 13 in the current period.
24
▲ 4.3%was 23
Total Crash Events
25
▼ -3.8%was 26
Persons Killed
13
▼ -45.8%was 24
Persons Injured
1
Hit-and-Run Crashes
Note: "Persons Killed" (25) counts individual fatalities across all crash events. "Fatal" in the severity table below (24) counts crash events where at least one fatality occurred. A single crash can result in multiple fatalities.
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Aggregate counts from crash, person, and vehicle records
Trend Summary
The number of fatal crashes saw a slight increase of 4.35%, rising from 23 in September 2022 to 24 in September 2023. Concurrently, the total number of fatalities decreased by 3.85%, from 26 to 25. This indicates a minor increase in the frequency of fatal crash events, but with a marginal reduction in the overall death toll.
1
Hit-and-Run Crashes — September 2023
4.2% hit-and-run rate this period vs 0.0% prior. Prior period: 0.
Vulnerable Road User Casualties
5
Pedestrians Killed
20
Motorists Killed
0
Pedestrians Injured
13
Motorists Injured
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Mode classified from person records (driver/passenger → motorist; pedestrian; bicyclist → cyclist; in-line skater / unspecified → other)
When Crashes Happen
The peak day for fatal crashes remained Friday, with 6 crashes in the current period compared to 5 in the prior period. However, the peak hour shifted from 2 PM (5 crashes) in September 2022 to 10 PM (4 crashes) in September 2023. Notably, fatal crashes on Thursdays increased from 1 to 5, and on Saturdays from 1 to 4.
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Crash date field aggregated by weekday
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Crash time field aggregated by hour (0-23)
Road & Environmental Conditions
Clear weather remained the most common condition for fatal crashes, accounting for 21 crashes in the current period, a slight decrease from 22 in the prior period. Fatal crashes in 'Dark - Lighted' conditions significantly increased from 5 in September 2022 to 13 in September 2023, becoming the dominant lighting condition. Conversely, fatal crashes in 'Daylight' conditions decreased from 14 to 9.
Weather
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Weather condition at time of crash
Lighting
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Lighting condition field
Vehicles & Demographics
Top Vehicle Makes (38 vehicles)
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Vehicle unit records
Sex Distribution (56 persons with recorded sex)
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Person-level records linked to crash events
Speed Limit Zones
Fatal crashes in 25 mph zones saw a substantial increase, rising from 1 in the prior period to 7 in the current period. Crashes in 40 mph zones decreased significantly from 8 to 3. There was also an increase in fatal crashes in 55 mph zones, from 1 to 3.
Fatal crashes by zone: 25 mph: 7 of 7 (100%) · 30 mph: 2 of 2 (100%) · 35 mph: 5 of 5 (100%) · 40 mph: 3 of 3 (100%) · 45 mph: 1 of 1 (100%) · 55 mph: 3 of 3 (100%) · 65 mph: 3 of 3 (100%)
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Posted speed limit at crash location
Manner of Collision
The dominant manner of collision in both periods was 'The First Harmful Event was Not a Collision with a Motor Vehicle in Transport,' increasing from 10 crashes (43.5%) in the prior period to 14 crashes (58.3%) in the current period. Angle collisions decreased from 6 to 3, and Front-to-Front collisions decreased from 4 to 2. Front-to-Rear collisions increased from 1 to 3.
Manner of Collision
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Crash-level records
Vehicle Type
Fatal crashes involving 'Two Wheel Motorcycle' decreased significantly from 12 in the prior period to 6 in the current period. Similarly, '4-door sedan, hardtop' crashes decreased from 11 to 8. Conversely, 'Compact Utility' fatal crashes increased from 3 to 5.
Vehicle Type
Showing top 9 of 16 reported. 7 additional (7 total) not shown: Three-wheel Motorcycle (2 Rear Wheels), Motor Scooter, 3-door/2-door hatchback, Farm equipment other than trucks, Minivan (Chrysler Town and Country, Caravan, Grand Caravan, Voyager, Voyager, Honda-Odyssey, ...), 2-door sedan,hardtop,coupe, Single-unit straight truck or Cab-Chassis (GVWR greater than 26,000 lbs.).
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Vehicle unit records
Roadway Functional Class
Minor Arterial roadways saw an increase in fatal crashes from 7 in the prior period to 11 in the current period, making it the most frequent functional class for fatal crashes. Interstate crashes remained stable at 5 in both periods. Principal Arterial crashes (combining 'Other Principal Arterial' and 'Principal Arterial - Other Freeways and Expressway') decreased from 7 in the prior period to 5 in the current period.
Roadway Functional Class
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Crash-level records
Roadway Ownership
Fatal crashes on roadways owned by the State Highway Agency decreased from 20 in the prior period to 14 in the current period. In contrast, fatal crashes on roadways owned by Town or Township Highway Agencies saw a significant increase, rising from 2 to 10. This represents a substantial shift in the distribution of fatal crashes across roadway ownership.
Roadway Ownership
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Crash-level records
Person Type
Driver fatalities decreased from 40 in the prior period to 36 in the current period. Passenger fatalities saw a slight increase from 14 to 15. Pedestrian fatalities remained consistent at 5 in both periods.
Person Type
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Crash-level records
Person Injury Severity
Total fatalities (K) decreased slightly from 26 in the prior period to 25 in the current period. Serious injuries (A) increased from 4 to 6, while minor injuries (B) significantly decreased from 14 to 6. The number of persons sustaining no injuries (O) in fatal crashes increased from 11 to 18.
Person Injury Severity
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Crash-level records
Occupant Safety Equipment
The use of 'Shoulder and Lap Belt Used' decreased slightly from 28 persons in the prior period to 27 in the current period. The number of persons reported with 'None Used/Not Applicable' safety equipment also decreased slightly from 17 to 16. The proportion of those not using safety equipment relative to those using belts remained relatively stable.
Occupant Safety Equipment
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Person-level records linked to crash events
Point of Impact
'12 Clock Point' (front impact) remained the dominant area of impact, increasing from 20 instances in the prior period to 22 in the current period. 'Non-Collision' impacts increased from 2 to 4. '6 Clock Point' (rear impact) also increased from 1 to 3.
Point of Impact
"Other" combines 3 smaller categories (3 records): 11 Clock Point (1), 2 Clock Point (1), 3 Clock Point (1).
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Vehicle unit records
Vehicles Per Crash
Single-vehicle fatal crashes significantly increased from 7 in the prior period to 12 in the current period, becoming the most frequent type. Two-vehicle fatal crashes decreased from 12 to 10. Three-vehicle fatal crashes also decreased from 4 to 2.
Vehicles Per Crash
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Crash-level records
Data Sources & Methodology
Primary Data Source
All crash data in this report is sourced from NHTSA FARS (Fatal Crashes), accessed programmatically via the NHTSA FARS 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: NHTSA FARS 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: 2023-09-01 through 2023-09-30
- Report generated: August 20, 2026
Data Coverage
- Reporting period: 2023-09-01 through 2023-09-30 (30 days)
- Geographic scope: Connecticut
- Total crash records analyzed: 24
- Total persons involved: 56
- Total vehicles involved: 38
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). "Connecticut Crash Intelligence Report: September 2023." Published August 20, 2026. Reporting period: 2023-09-01 to 2023-09-30. Data source: NHTSA FARS (Fatal Crashes), NHTSA FARS Open Data. Available at: https://thatcarhitme.com/crash-data/connecticut/fatal/statewide/september-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: NHTSA FARS (Fatal Crashes) · NHTSA FARS
Period: 2023-09-01 – 2023-09-30
Generated: August 20, 2026 · All rights reserved
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