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 · IDAHO · 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/idaho/fatal/statewide/september-2023-report
Monthly Traffic Safety Analysis
25 CRASHES IN
IDAHO
SEPTEMBER 2023
Fatal crashes in September 2023 increased by 13.64% compared to September 2022, with 25 fatal crashes reported this year versus 22 last year. Total fatalities also rose from 26 to 31. A notable shift was the significant increase in fatal crashes involving motorcycles, which more than doubled from 2 to 5.
25
▲ 13.6%was 22
Total Crash Events
31
▲ 19.2%was 26
Persons Killed
11
▼ -15.4%was 13
Persons Injured
25
▲ 13.6%was 22
Fatal Crash Events
Note: "Persons Killed" (31) counts individual fatalities across all crash events. "Fatal" in the severity table below (25) 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
Fatal crashes showed an upward trend year-over-year, increasing from 22 incidents in September 2022 to 25 in September 2023. This represents a 13.64% rise in fatal crash events. Concurrently, the total number of fatalities also increased by 19.23%, from 26 to 31.
Vulnerable Road User Casualties
3
Pedestrians Killed
1
Cyclists Killed
27
Motorists Killed
0
Pedestrians Injured
0
Cyclists Injured
11
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 Thursday in September 2022, with 8 incidents, to Saturday in September 2023, with 7 incidents. The peak hour also changed, moving from 6 PM in the prior period to 12 PM in the current period, both recording 4 fatal crashes. Overall, there was a redistribution of fatal crashes across days and hours.
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
Fatal crashes occurring in clear weather conditions increased from 18 to 21 year-over-year, while those in cloudy conditions remained stable at 4. Regarding lighting, fatal crashes during daylight decreased from 16 to 10, while crashes in dark, unlighted conditions saw a substantial increase from 4 to 11. The road surface condition data was not available for comparison.
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 (35 vehicles)
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Vehicle unit records
Sex Distribution (54 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 on roadways with a 65 mph speed limit saw a significant increase, rising from 2 in the prior period to 8 in the current period. Conversely, fatal crashes in 35 mph zones decreased from 4 to 1. Crashes in 55 mph zones also increased from 3 to 5, indicating a shift towards higher speed roadways experiencing more fatal incidents.
Fatal crashes by zone: 15 mph: 1 of 1 (100%) · 25 mph: 3 of 3 (100%) · 35 mph: 1 of 1 (100%) · 45 mph: 1 of 1 (100%) · 50 mph: 2 of 2 (100%) · 55 mph: 5 of 5 (100%) · 60 mph: 1 of 1 (100%) · 65 mph: 8 of 8 (100%) · 70 mph: 1 of 1 (100%) · 80 mph: 2 of 2 (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 fatal collision in both periods was 'The First Harmful Event was Not a Collision with a Motor Vehicle in Transport,' increasing from 13 fatal crashes (59.1%) in September 2022 to 16 fatal crashes (64%) in September 2023. Front-to-Front collisions also saw a slight increase from 3 to 4 fatal crashes, while Angle collisions remained consistent with 3 fatal crashes in both periods.
Manner of Collision
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Crash-level records
Vehicle Type
The most significant change in vehicle body types involved in fatal crashes was a substantial increase in truck-tractors, rising from 1 in the prior period to 8 in the current period. Fatal crashes involving two-wheel motorcycles also increased from 2 to 5. Conversely, 4-door sedans saw a decrease in involvement from 11 fatal crashes to 6.
Vehicle Type
Showing top 9 of 10 reported. 1 additional (1 total) not shown: 5-door/4-door hatchback.
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Vehicle unit records
Rural vs Urban
Fatal crashes on rural roadways increased from 19 in September 2022 to 22 in September 2023, while urban fatal crashes remained stable at 3. The rural share of fatal crashes remained high, accounting for 88% of all fatal crashes in the current period, indicating rural areas continue to experience a disproportionate number of fatalities.
Rural vs Urban
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Crash-level records
Roadway Functional Class
Minor Arterial roadways experienced a notable increase in fatal crashes, rising from 2 in the prior period to 7 in the current period. Interstate fatal crashes also increased from 3 to 5 year-over-year. In contrast, fatal crashes on Local roads decreased significantly from 6 to 1.
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 State Highway Agency-owned roadways increased from 11 in September 2022 to 17 in September 2023. Crashes on City or Municipal Highway Agency roads also rose from 5 to 8. Notably, County Highway Agency roads, which had 6 fatal crashes in the prior period, recorded none in the current period.
Roadway Ownership
Source: NHTSA FARS (Fatal Crashes) · Federal fatal-crash census · 2023-09-01 to 2023-09-30 · Crash-level records
Person Type
The number of drivers involved in fatal crashes increased from 31 to 35, and passengers involved increased from 11 to 14. Pedestrian involvement in fatal crashes decreased slightly from 4 to 3. The number of bicyclists involved remained consistent at 1.
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) increased from 26 to 31 year-over-year. The number of persons with serious injuries (A) decreased from 6 to 4, while those with minor injuries (B) increased from 3 to 5. The count of uninjured persons (O) also rose from 8 to 12.
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 reported as using shoulder and lap belts in fatal crashes increased from 18 to 30. Conversely, the count of persons reported as using no safety equipment or where it was not applicable slightly decreased from 16 to 15. The number of persons with unknown safety equipment use decreased from 8 to 4.
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
The '12 Clock Point' remained the most frequent point of impact in fatal crashes, though its count decreased from 18 in September 2022 to 15 in September 2023. Fatal crashes categorized as 'Non-Collision' increased from 4 to 6. There was also a new occurrence of 4 fatal crashes at the '10 Clock Point in the current period.
Point of Impact
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 saw a slight increase from 13 in September 2022 to 14 in September 2023. Two-vehicle fatal crashes also increased, rising from 9 to 11. This indicates an increase in both single and two-vehicle fatal crash incidents year-over-year.
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 5, 2026
Data Coverage
- Reporting period: 2023-09-01 through 2023-09-30 (30 days)
- Geographic scope: Idaho
- Total crash records analyzed: 25
- Total persons involved: 54
- Total vehicles involved: 35
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). "Idaho 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/idaho/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
Someone you love in this data? We’ll help you find out if you have a case.
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