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 · WYOMING · 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.
GET: https://thatcarhitme.com/api/crash-data/reports/data/wyoming/fatal/statewide/september-2023-report
Monthly Traffic Safety Analysis
9 CRASHES IN
WYOMING
SEPTEMBER 2023
In September 2023, Wyoming recorded 9 fatal crashes and 12 fatalities, a decrease from 10 fatal crashes and 13 fatalities in September 2022. The most notable year-over-year shift was the absence of DUI-related fatal crashes in the current period, down from 3 in the prior period.
9
▼ -10.0%was 10
Total Crash Events
12
▼ -7.7%was 13
Persons Killed
3
▼ -57.1%was 7
Persons Injured
9
▼ -10.0%was 10
Fatal Crash Events
Note: "Persons Killed" (12) counts individual fatalities across all crash events. "Fatal" in the severity table below (9) 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 overall trend indicates a slight decrease in fatal crash incidents and associated fatalities year-over-year. Fatal crashes decreased from 10 in September 2022 to 9 in September 2023, while total fatalities decreased from 13 to 12 over the same period. Total injuries also saw a decrease, from 7 to 3.
Vulnerable Road User Casualties
1
Pedestrians Killed
11
Motorists Killed
0
Pedestrians Injured
3
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 shifted from Saturday in the prior period (3 crashes) to Monday in the current period (3 crashes). The peak hour for fatal crashes also changed, with 3:00 PM being the peak in the prior period (3 crashes) and 4:00 PM in the current period (2 crashes).
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 was the dominant condition for fatal crashes in both periods, with 8 crashes in the current period and 9 in the prior period. Rain was a factor in 1 fatal crash in both September 2023 and September 2022. Daylight was the most common lighting condition, accounting for 6 fatal crashes in both periods.
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 (11 vehicles)
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Vehicle unit records
Sex Distribution (18 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 September 2023 occurred across speed limits ranging from 20 mph to 80 mph, with 2 crashes occurring in 65 mph zones. In September 2022, fatal crashes were recorded in zones from 30 mph to 80 mph, with 2 crashes each in 65 mph and 70 mph zones. The 70 mph zone saw a decrease from 2 fatal crashes in the prior period to 1 in the current period.
Fatal crashes by zone: 20 mph: 1 of 1 (100%) · 40 mph: 1 of 1 (100%) · 45 mph: 1 of 1 (100%) · 65 mph: 2 of 2 (100%) · 70 mph: 1 of 1 (100%) · 75 mph: 1 of 1 (100%) · 80 mph: 1 of 1 (100%)
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Posted speed limit at crash location
Vehicle Type
Minivans were involved in 3 fatal crashes in the current period, making them the most common body type, compared to 0 in the prior period. Two Wheel Motorcycles were involved in 2 fatal crashes in September 2023, a decrease from 3 in September 2022. Light Pickups saw a decrease from 3 fatal crashes in the prior period to 1 in the current period.
Vehicle Type
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Vehicle unit records
Person Type
Drivers remained the most common person type involved in fatal crashes, decreasing from 14 in the prior period to 11 in the current period. Passengers involved in fatal crashes also decreased from 7 to 6. Pedestrians were involved in 1 fatal crash in the current period, while none were recorded in the prior period.
Person Type
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Crash-level records
Person Injury Severity
Fatal injuries (K) decreased from 13 in the prior period to 12 in the current period. Minor injuries (B) decreased from 3 to 2, while possible injuries (C) remained at 1 in both periods. The number of persons with no injury (O) increased from 1 in the prior period to 3 in the current period.
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 number of persons using shoulder and lap belts in fatal crashes increased from 8 in September 2022 to 11 in September 2023. Conversely, the number of persons reported with no safety equipment used or not applicable decreased from 9 to 6. This indicates a shift towards higher reported restraint use among participants.
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
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 5, 2026
Data Coverage
- Reporting period: 2023-09-01 through 2023-09-30 (30 days)
- Geographic scope: Wyoming
- Total crash records analyzed: 9
- Total persons involved: 18
- Total vehicles involved: 11
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). "Wyoming Crash Intelligence Report: September 2023." Published August 5, 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/wyoming/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 5, 2026 · All rights reserved
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