Duncan, OK truck route planning & crash data
Plan safer truck routes in Duncan: commercial truck and garbage truck crashes in Duncan and Stephens County, dangerous roads, seasonality and route safety data for fleets. Patterns use Stephens County numbers.
Where fatal truck crashes happened
Risk scorecard
Key findings
Snapshot
Crashes by month
Garbage trucks vs all trucks
8 of 257 truck crashes since 2015.
Deadliest roads
How Stephens County compares with Oklahoma
Stephens County against Oklahoma and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Stephens County stands out
Full comparison
| Measure (2015–2025) | Stephens County | Oklahoma | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 53.5 | 79.3 | 49.7 | 33% below the state |
| Deaths per 100 crashes | 3.0 | 4.1 | 3.4 | 27% below the state |
| Injuries per crash | 0.64 | 0.44 | 0.49 | 1.5× the state |
| Garbage-truck share | 3.4% | 1.4% | 2.3% | 2.4× the state |
| On snow, slush or ice | 3.0% | 5.3% | 6.2% | 44% below the state |
| Morning rush (6–10 am) | 14.8% | 22.6% | 23.7% | 34% below the state |
| In rain, sleet or snow | 7.6% | 12.8% | 13.8% | 41% below the state |
| Winter months (Nov–Mar) | 38.6% | 40.4% | 41.9% | same |
| After dark | 22.5% | 25.4% | 24.8% | 12% below the state |
Compared with Oklahoma, Stephens County is lower on crashes per 100k residents / yr, deaths per 100 crashes and on snow, slush or ice. Where it is higher: injuries per crash and garbage-truck share.
Stephens County at a glance: 1 in 29 garbage-truck share of crashes is 3.4%, against 1.4% for Oklahoma.
Overview
Police reported 257 crashes involving commercial trucks in Stephens County since 2015: 162 people were injured and 8 were killed.
In complete reporting years that works out to about one truck crash every 15 days.
Only 113 truck crashes were reported in Duncan since 2015; patterns below come from Stephens County as a whole.
When crashes happen
September has the most truck crashes, 10.9% of the yearly total, while April has the fewest (5.8%).
Winter months (Nov–Mar) carry 38.6% of truck crashes, vs 40.4% for Oklahoma.
By time of day, 11 am–12 pm stands out with 10.9% of truck crashes.
Snow, slush or ice was on the road in 3.0% of truck crashes, compared with 5.3% in Oklahoma.
Where crashes happen
Fatal large-truck crashes within 10 miles of Duncan since 2015 were spread across roads: SR-7 (1) and SR-7C (1).
Garbage & waste trucks
Garbage trucks account for 8 of the truck crashes here, or 3.1%, compared with 1.4% in Oklahoma.
Route planning tips for Duncan fleets
- Build extra time into September routes: it has the most truck crashes here.
- Check your own stops for crash hotspots and low bridges with the free Route Planner.
About the data
This report uses the FMCSA crash file (reported crashes of trucks over 10,000 lb) and NHTSA FARS (fatal crashes). It reports the numbers without guessing at reasons.
Reporting was incomplete in 2019, so those years are greyed out and left out of rates and comparisons.
Truck crashes by year: all trucks vs garbage trucks
Seasonality: when trucks crash in Stephens County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| SR-7 | 1 |
| SR-7C | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Stephens County) |
|---|---|
| US-81 | 29 |
| Sh-7 | 15 |
| State Highway 7 | 13 |
| SR-81 | 13 |
| Sh-29 | 10 |
| SR-7 | 8 |
| State Highway 29 | 7 |
| Ok-29 | 5 |
Duncan at a glance
| Population | 23,174 |
| Land area | 42.9 sq mi |
| Density | 540 per sq mi |
Waste facilities and haulers nearby
Historical data: truck crashes in Stephens County since the 1990s
Combines the FMCSA crash file (all reported truck crashes, real coverage from about 1990) with NHTSA FARS (fatal crashes involving a large truck, 1982–2024).
| Decade | Truck crashes / yr | Change | Fatal crashes / yr (FARS) |
|---|---|---|---|
| 1990s | 7 | — | 0.3 |
| 2000s | 12 | +82% | 0.9 |
| 2010s | 26 | +109% | 0.8 |
| 2020s | 21 | -18% | 0.6 |
Reported truck crashes averaged 7 a year in the 1990s and 21 a year in the 2020s. Reporting practices changed over time, so part of any change can come from reporting. NHTSA counts 0.8 fatal large-truck crashes a year in 2016–19 and 0.6 a year in 2020–24.
Nearby places
Questions fleets ask about Duncan
How common are truck crashes in Duncan?
257 truck crashes have been reported in Stephens County since 2015, with 8 deaths and 162 injuries.
When do most truck crashes happen in Duncan?
September has the most truck crashes in Stephens County, 10.9% of the yearly total.
How many garbage truck crashes are there in Duncan?
8 crashes involving garbage or refuse trucks have been reported in Stephens County since 2015, 3.1% of all truck crashes.
What is the truck crash rate in Duncan compared with Oklahoma?
Stephens County records 53.5 truck crashes per 100,000 residents a year, against 79.3 across Oklahoma.
How can I plan a safer truck route in Duncan?
Paste your stops into the free CurbWaste Route Planner: it scores your route against fatal-crash locations, suggests safer alternatives and flags low bridges.
Crash reporting to FMCSA was incomplete in 2019; those years are greyed out and left out of rates. 2026 is a partial year. Updated October 2026.