States › Kansas › Routes › US Route 166
US Route 166
Fatal crashes 2015–2024 35Deaths 41Counties 5Latest data year 2024
FARS data are based on police crash reports and other sources; the drunk-driving measure is based on the highest BAC of any driver in the crash. Latest data year: 2024. The route is the trafficway recorded for each crash (FARS TWAY_ID); the same route number in another state has its own page.
US Route 166 in Kansas was the trafficway in 35 fatal crashes between 2015 and 2024, in which 41 people died.
That is 1% of the 3,631 fatal crashes in Kansas over the same years. The ten-year crash count rose 30% from 27 in 2005–2014 to 35 in 2015–2024.
The crashes were concentrated in Montgomery County (12), Cherokee County (8) and Chautauqua County (7) and 2 other counties.
20.0% of the crashes had a driver reported as drinking (Kansas: 22.5%) and 20.0% had a speeding-related driver (24.2%); pedestrians were 0.0% and motorcyclists 17.1% of those killed.
Fatal crashes per year
Route identification in FARS is consistent from 2000; earlier years are not shown. Shaded band: the ten-year window used for the shares below.
Compared with all fatal crashes in Kansas
| Measure | US Route 166 | Kansas |
|---|---|---|
| Fatal crashes, 2015–2024 | 35 | 3,631 |
| Deaths, 2015–2024 | 41 | 4,045 |
| Deaths per fatal crash | 1.2 | 1.1 |
| Share of state fatal crashes | 1% | 100% |
| Change vs previous ten years | +30% | 0% |
Factor shares
Counties along the route
| # | County | Fatal crashes on US-166 | Share of route | County total, all roads |
|---|---|---|---|---|
| 1 | Montgomery County | 12 | 34% | 71 |
| 2 | Cherokee County | 8 | 23% | 40 |
| 3 | Chautauqua County | 7 | 20% | 10 |
| 4 | Cowley County | 5 | 14% | 50 |
| 5 | Labette County | 3 | 9% | 34 |
Hour of day
Share of fatal crashes on US Route 166 beginning in each hour, 2015–2024; tick marks the Kansas share for all roads.
Where along the route
| Mile marker range | Fatal crashes | Share |
|---|---|---|
| Mile 60–65 | 2 | 6% |
| Mile 85–90 | 2 | 6% |
| Mile 90–95 | 2 | 6% |
| Mile 110–115 | 2 | 6% |
| Mile 115–120 | 2 | 6% |
| Mile 150–155 | 2 | 6% |
Five-mile bins by FARS milepoint, the six with the most fatal crashes; 68.6% of crashes on the route have a milepoint. Milepoints are as recorded by the state and can restart at county or district lines.
Other routes in Kansas
- Interstate 70 183
- Interstate 35 120
- US Route 54 104
- US Route 24 87
- US Route 50 83
- US Route 56 69
- US Route 75 66
- US Route 160 64
- Interstate 135 57
- US Route 69 51
- US Route 169 50
- US Route 400 47
All routes and counties in Kansas
Questions and answers
How many fatal crashes have there been on US Route 166 in Kansas?
35 fatal crashes with 41 deaths over 2015–2024, per NHTSA's FARS. The route is the trafficway recorded for the crash; the same numbered route in another state has its own page.
Which counties along US Route 166 had the most fatal crashes?
Montgomery County (12), Cherokee County (8), Chautauqua County (7), Cowley County (5) and Labette County (3).
What share of crashes on US Route 166 involved alcohol or speeding?
20.0% had a driver reported as drinking and 20.0% a speeding-related driver, against 22.5% and 24.2% for all fatal crashes in Kansas.
When do fatal crashes happen on US Route 166?
29.4% of the crashes were between 6pm and 6am. The hour chart on this page shows the full distribution.
Provenance
Source: NHTSA Fatality Analysis Reporting System, annual national CSV files 2000–2024 (accident, vehicle and person tables), public domain. Route pages are built for signed Interstate, US and state routes with at least 20 fatal crashes in 2015–2024. Data through 31 Dec 2024; generated 30 Sep 2026. See methodology and corrections.