Williams, IA truck route planning & crash data
Plan safer truck routes in Williams: commercial truck and garbage truck crashes in Williams and Hamilton County, dangerous roads, seasonality and route safety data for fleets. Patterns use Hamilton County numbers.
Where fatal truck crashes happened
Risk scorecard
Key findings
Snapshot
Crashes by month
Garbage trucks vs all trucks
2 of 405 truck crashes since 2015.
Deadliest roads
How Hamilton County compares with Iowa
Hamilton County against Iowa and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Hamilton County stands out
Full comparison
| Measure (2015–2025) | Hamilton County | Iowa | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 230.1 | 68.1 | 49.7 | 3.4× the state |
| Deaths per 100 crashes | 4.3 | 3.5 | 3.4 | 1.2× the state |
| Injuries per crash | 0.40 | 0.41 | 0.49 | same |
| Garbage-truck share | 0.5% | 2.2% | 2.3% | 76% below the state |
| On snow, slush or ice | 39.1% | 18.7% | 6.2% | 2.1× the state |
| Morning rush (6–10 am) | 26.3% | 24.0% | 23.7% | 1.1× the state |
| In rain, sleet or snow | 27.9% | 15.1% | 13.8% | 1.8× the state |
| Winter months (Nov–Mar) | 60.6% | 45.4% | 41.9% | 1.3× the state |
| After dark | 34.6% | 23.1% | 24.8% | 1.5× the state |
Compared with Iowa, Hamilton County is lower on garbage-truck share. Where it is higher: crashes per 100k residents / yr, deaths per 100 crashes and on snow, slush or ice.
The headline for Hamilton County: 39.1% of truck crashes happened on snow, slush or ice, vs 18.7% in Iowa.
Overview
Since 2015, 405 crashes involving commercial trucks have been reported in Hamilton County. They injured 225 people and killed 16.
In complete reporting years that works out to about one truck crash every 11 days.
Williams had 4 reported truck crashes since 2015, too few for reliable patterns, so the charts and findings on this page use Hamilton County numbers.
74% of truck crash reports in Hamilton County since 2015 leave the city field blank; place counts include only reports that name the place.
When crashes happen
December has the most truck crashes, 18.8% of the yearly total, while April has the fewest (4.0%).
Winter months (Nov–Mar) carry 60.6% of truck crashes, vs 45.4% for Iowa.
By time of day, 3–4 pm stands out with 11.9% of truck crashes.
39.1% of truck crashes here happened on snow, slush or ice, against 18.7% across Iowa.
Where crashes happen
The deadliest road for trucks within 10 miles of Williams is US-20, with 3 fatal large-truck crashes since 2015. Next come CR-D20/190TH St (1), I-35 (1) and SR-359 (1).
Garbage & waste trucks
Garbage and refuse trucks were involved in 2 crashes, 0.5% of the total, against 2.2% across Iowa.
Route planning tips for Williams fleets
- Build extra time into December routes: it has the most truck crashes here.
- Where you can, review stops along US-20; it has the most fatal large-truck crashes nearby.
- Morning starts matter: 26.3% of truck crashes fall between 6 and 10 am, higher than Iowa.
- With 39.1% of truck crashes on snow, slush or ice (above Iowa), plan winter equipment checks early.
- Check your own stops for crash hotspots and low bridges with the free Route Planner.
About the data
Crash counts come from the FMCSA crash file (police-reported crashes involving trucks over 10,000 lb); fatal-crash locations come from NHTSA FARS. Text on this page states only what these numbers show.
Truck crashes by year: all trucks vs garbage trucks
Seasonality: when trucks crash in Hamilton County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| US-20 | 3 |
| CR-D20/190TH St | 1 |
| I-35 | 1 |
| SR-359 | 1 |
| US-69 | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Hamilton County) |
|---|---|
| I-35 | 37 |
| US-20 | 17 |
| Ia 17 | 11 |
| I 35 S, 141.75Mm | 10 |
| Interstate 35/I 35 | 9 |
| Nb Exit Ramp | 7 |
| Ramp 220Th St, E To E To State | 6 |
| Ramp Us 20 W To I 35 N And I 3 | 4 |
Williams at a glance
| Population | 299 |
| Land area | 0.8 sq mi |
| Density | 352 per sq mi |
| Median household income (ZIP 50271) | $82,656 |
| Median home value (ZIP 50271) | $147,463 |
Waste facilities and haulers nearby
Historical data: truck crashes in Hamilton 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 | 12 | — | 0.7 |
| 2000s | 21 | +80% | 0.6 |
| 2010s | 24 | +12% | 0.4 |
| 2020s | 42 | +77% | 1.2 |
Reported truck crashes averaged 12 a year in the 1990s and 42 a year in the 2020s. Reporting practices changed over time, so part of any change can come from reporting. NHTSA counts 0.0 fatal large-truck crashes a year in 2016–19 and 1.2 a year in 2020–24.
Nearby places
Questions fleets ask about Williams
How many truck crashes happen in Williams?
405 truck crashes have been reported in Hamilton County since 2015, with 16 deaths and 225 injuries.
Where do fatal truck crashes happen most in Williams?
NHTSA data shows US-20 with 3 fatal large-truck crashes within 10 miles of Williams since 2015, the highest of any road.
Which month has the most truck crashes in Williams?
The worst month is December: 18.8% of truck crashes in Hamilton County happen then.
Are garbage truck crashes common in Williams?
Since 2015, Hamilton County has reported 2 garbage-truck crashes, or 0.5% of its truck crashes.
How do truck crashes in Williams compare with Iowa?
Per 100,000 residents, Hamilton County has 230.1 truck crashes a year; Iowa has 68.1.
How can I plan a safer truck route in Williams?
The free Route Planner takes your stops and returns a route risk score, safer alternatives and low-bridge warnings.
2026 is a partial year. Updated October 2026.