Jefferson County, WI truck route planning & crash data
Plan safer truck routes in Jefferson County: commercial truck and garbage truck crashes, dangerous roads, seasonality and route safety data for fleets.
Where fatal truck crashes happened
Risk scorecard
Key findings
Snapshot
Crashes by month
Garbage trucks vs all trucks
19 of 481 truck crashes since 2015.
Deadliest roads
How Jefferson County compares with Wisconsin
Jefferson County against Wisconsin and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Jefferson County stands out
Full comparison
| Measure (2015–2025) | Jefferson County | Wisconsin | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 47.7 | 42.6 | 49.7 | 1.1× the state |
| Deaths per 100 crashes | 4.6 | 3.4 | 3.4 | 1.4× the state |
| Injuries per crash | 0.39 | 0.46 | 0.49 | 15% below the state |
| Garbage-truck share | 4.2% | 2.7% | 2.3% | 1.5× the state |
| On snow, slush or ice | 15.9% | 13.4% | 6.2% | 1.2× the state |
| Morning rush (6–10 am) | 31.6% | 26.9% | 23.7% | 1.2× the state |
| In rain, sleet or snow | 16.8% | 16.5% | 13.8% | same |
| Winter months (Nov–Mar) | 49.7% | 44.9% | 41.9% | 1.1× the state |
| After dark | 21.0% | 20.9% | 24.8% | same |
Jefferson County sits below Wisconsin on injuries per crash. It runs above Wisconsin on crashes per 100k residents / yr, deaths per 100 crashes and garbage-truck share.
Jefferson County at a glance: 1 in 24 crashes involve a garbage truck (19 since 2015), vs 2.7% across Wisconsin.
Overview
Since 2015, 481 crashes involving commercial trucks have been reported in Jefferson County. They injured 185 people and killed 21.
That averages about one truck crash every 9 days in fully reported years.
When crashes happen
January has the most truck crashes, 13.3% of the yearly total, while June has the fewest (3.7%).
Winter months (Nov–Mar) carry 49.7% of truck crashes, vs 44.9% for Wisconsin.
More truck crashes happen at 9–10 am than at any other hour (9.6%).
Road surface: 15.9% of truck crashes were on snow, slush or ice (Wisconsin: 13.4%).
Where crashes happen
I-94 leads in Jefferson County with 4 fatal crashes involving a large truck since 2015. After it: SR-26 (3), US-12 (2) and US-18 (2).
Garbage & waste trucks
Garbage trucks account for 19 of the truck crashes here, or 4.0%, compared with 2.7% in Wisconsin.
Route planning tips for Jefferson County fleets
- Build extra time into January routes: it has the most truck crashes here.
- Where you can, review stops along I-94; it has the most fatal large-truck crashes nearby.
- The morning rush (6–10 am) holds 31.6% of truck crashes here, more than Wisconsin; adjust start times where you can.
- Icy and snowy roads show up in 15.9% of truck crashes here, more than Wisconsin; schedule winter checks early.
- Use the free Route Planner to score your route and spot low bridges before drivers head out.
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.
Truck crashes by year: all trucks vs garbage trucks
Seasonality: when trucks crash in Jefferson County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (in Jefferson County) |
|---|---|
| I-94 | 4 |
| SR-26 | 3 |
| US-12 | 2 |
| US-18 | 2 |
| 4th St | 1 |
| Beryl Dr | 1 |
| CR-B | 1 |
| CR-Y | 1 |
| First St S | 1 |
| SR-59 | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Jefferson County) |
|---|---|
| I-094 | 166 |
| Sth 026 | 56 |
| Ush 012 | 22 |
| Ush 018 | 16 |
| Parking Lot | 12 |
| Cth | 9 |
| Cth F | 9 |
| Cth B | 8 |
Jefferson County at a glance
| Population | 86,245 |
| Land area | 556.5 sq mi |
| Density | 155 per sq mi |
| Median household income (ZIP average) | $84,695 |
Waste facilities and haulers nearby
Historical data: truck crashes in Jefferson 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 | 36 | — | 1.7 |
| 2000s | 41 | +14% | 2.3 |
| 2010s | 37 | -10% | 1.2 |
| 2020s | 44 | +18% | 1.8 |
In the 1990s about 36 truck crashes a year were reported; in the 2020s, about 44. Reporting coverage also changed between these periods. Fatal large-truck crashes: 2.0 a year in 2016–19, 1.8 a year in 2020–24.
Cities, towns & communities in Jefferson County
ZIP codes in Jefferson County
Nearby counties
Questions fleets ask about Jefferson County
How many truck accidents are there in Jefferson County?
Since 2015, 481 crashes involving commercial trucks were reported in Jefferson County (185 injured, 21 killed).
Where do fatal truck crashes happen most in Jefferson County?
NHTSA data shows I-94 with 4 fatal large-truck crashes in Jefferson County since 2015, the highest of any road.
When do most truck crashes happen in Jefferson County?
The worst month is January: 13.3% of truck crashes in Jefferson County happen then.
How many garbage truck crashes are there in Jefferson County?
19 crashes involving garbage or refuse trucks have been reported in Jefferson County since 2015, 4.0% of all truck crashes.
How does Jefferson County compare with Wisconsin for truck crashes?
Per 100,000 residents, Jefferson County has 47.7 truck crashes a year; Wisconsin has 42.6.
What is the best way to plan truck routes in Jefferson County?
Use the free Route Planner: enter your stops to get a risk score, safer alternatives and the low bridges on your route.
2026 is a partial year. Updated October 2026.