Rock County, WI truck route planning & crash data
Plan safer truck routes in Rock 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
13 of 1,235 truck crashes since 2015.
Deadliest roads
How Rock County compares with Wisconsin
Rock County against Wisconsin and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Rock County stands out
Full comparison
| Measure (2015–2025) | Rock County | Wisconsin | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 64.5 | 42.6 | 49.7 | 1.5× the state |
| Deaths per 100 crashes | 3.2 | 3.4 | 3.4 | same |
| Injuries per crash | 0.58 | 0.46 | 0.49 | 1.3× the state |
| Garbage-truck share | 1.0% | 2.7% | 2.3% | 63% below the state |
| On snow, slush or ice | 16.3% | 13.4% | 6.2% | 1.2× the state |
| Morning rush (6–10 am) | 20.8% | 26.9% | 23.7% | 23% below the state |
| In rain, sleet or snow | 22.7% | 16.5% | 13.8% | 1.4× the state |
| Winter months (Nov–Mar) | 50.6% | 44.9% | 41.9% | 1.1× the state |
| After dark | 28.4% | 20.9% | 24.8% | 1.4× the state |
Rock County sits below Wisconsin on garbage-truck share and morning rush (6–10 am). Where it is higher: crashes per 100k residents / yr, injuries per crash and on snow, slush or ice.
The headline for Rock County: January worst month: 16.9% of truck crashes, vs 8.3% in an average month.
Overview
Police reported 1,235 crashes involving commercial trucks in Rock County since 2015: 702 people were injured and 38 were killed.
In complete reporting years that works out to about one truck crash every 3 days.
When crashes happen
Truck crashes peak in January (16.9% of the year) and are lowest in April (5.3%).
November through March accounts for 50.6% of truck crashes here, compared with 44.9% in Wisconsin.
The busiest hour is 12–1 pm, with 11.4% of truck crashes.
Road surface: 16.3% of truck crashes were on snow, slush or ice (Wisconsin: 13.4%).
Where crashes happen
Within this area, I-39 had the most fatal crashes involving a large truck since 2015 (7). It is followed by US-14 (5), SR-81 (4) and I-43 (3).
Garbage & waste trucks
Garbage trucks account for 13 of the truck crashes here, or 1.1%, compared with 2.7% in Wisconsin.
Route planning tips for Rock County fleets
- Plan January schedules with more margin; it is the worst month for truck crashes in Rock County.
- Look at alternatives to I-39 at busy times: it leads this area in fatal truck crashes.
- Icy and snowy roads show up in 16.3% of truck crashes here, more than Wisconsin; schedule winter checks early.
- Check your own stops for crash hotspots and low bridges with the free Route Planner.
About the data
Sources: the FMCSA crash file for all reported truck crashes and NHTSA FARS for fatal crashes with a large truck. Every statement here comes straight from those numbers.
Truck crashes by year: all trucks vs garbage trucks
Seasonality: when trucks crash in Rock County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (in Rock County) |
|---|---|
| I-39 | 7 |
| US-14 | 5 |
| SR-81 | 4 |
| I-43 | 3 |
| SR-11 | 3 |
| SR-59 | 2 |
| CR-B | 1 |
| CR-G | 1 |
| CR-M | 1 |
| Carvers Rock Rd | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Rock County) |
|---|---|
| I-039 | 549 |
| I-043 | 53 |
| Ush 014 | 46 |
| Sth 011 | 39 |
| SR-039 | 36 |
| Sth 081 | 35 |
| Ush 051 | 23 |
| Sth 059 | 20 |
Rock County at a glance
| Population | 165,461 |
| Land area | 718.2 sq mi |
| Density | 230 per sq mi |
| Median household income (ZIP average) | $75,554 |
Waste facilities and haulers nearby
Historical data: truck crashes in Rock 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 | 82 | — | 2.4 |
| 2000s | 111 | +35% | 2.8 |
| 2010s | 99 | -11% | 3.0 |
| 2020s | 103 | +5% | 3.0 |
In the 1990s about 82 truck crashes a year were reported; in the 2020s, about 103. Reporting coverage also changed between these periods. Fatal crashes involving a large truck averaged 3.2 a year in 2016–19 and 3.0 a year in 2020–24.
Cities, towns & communities in Rock County
ZIP codes in Rock County
Nearby counties
Questions fleets ask about Rock County
How many truck accidents are there in Rock County?
1,235 truck crashes have been reported in Rock County since 2015, with 38 deaths and 702 injuries.
Where do fatal truck crashes happen most in Rock County?
Since 2015, I-39 has had the most fatal large-truck crashes in Rock County: 7.
When do most truck crashes happen in Rock County?
The worst month is January: 16.9% of truck crashes in Rock County happen then.
Are garbage truck crashes common in Rock County?
13 crashes involving garbage or refuse trucks have been reported in Rock County since 2015, 1.1% of all truck crashes.
How does Rock County compare with Wisconsin for truck crashes?
The yearly rate is 64.5 truck crashes per 100,000 residents in Rock County, vs 42.6 for Wisconsin.
What is the best way to plan truck routes in Rock County?
Paste your stops into the free CurbWaste Route Planner: it scores your route against fatal-crash locations, suggests safer alternatives and flags low bridges.
2026 is a partial year. Updated October 2026.