ZIP 52340 (Tiffin, IA) truck route planning & crash data
Plan safer truck routes around ZIP 52340: commercial truck and garbage truck crashes here and in Johnson County, 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
20 of 1,147 truck crashes since 2015.
Deadliest roads
How Johnson County compares with Iowa
Johnson County against Iowa and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Johnson County stands out
Full comparison
| Measure (2015–2025) | Johnson County | Iowa | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 61.7 | 68.1 | 49.7 | 9% below the state |
| Deaths per 100 crashes | 3.6 | 3.5 | 3.4 | same |
| Injuries per crash | 0.42 | 0.41 | 0.49 | same |
| Garbage-truck share | 1.7% | 2.2% | 2.3% | 24% below the state |
| On snow, slush or ice | 20.1% | 18.7% | 6.2% | 1.1× the state |
| Morning rush (6–10 am) | 21.4% | 24.0% | 23.7% | 11% below the state |
| In rain, sleet or snow | 18.4% | 15.1% | 13.8% | 1.2× the state |
| Winter months (Nov–Mar) | 47.3% | 45.4% | 41.9% | same |
| After dark | 27.1% | 23.1% | 24.8% | 1.2× the state |
Johnson County has lower values than Iowa for crashes per 100k residents / yr, garbage-truck share and morning rush (6–10 am). It stands out for higher on snow, slush or ice, in rain, sleet or snow and after dark.
ZIP 52340 at a glance: I-80 most fatal truck crashes within 10 miles of ZIP 52340: 11 since 2015.
Overview
Johnson County has recorded 1,147 truck crashes since 2015, with 466 people injured and 40 killed.
That averages about one truck crash every 4 days in fully reported years.
When crashes happen
Truck crashes peak in January (12.4% of the year) and are lowest in September (6.5%).
The five winter months (November to March) hold 47.3% of truck crashes, against 45.4% across Iowa.
The busiest hour is 3–4 pm, with 7.6% of truck crashes.
Road surface: 20.1% of truck crashes were on snow, slush or ice (Iowa: 18.7%).
Where crashes happen
I-80 leads within 10 miles of ZIP 52340 with 11 fatal crashes involving a large truck since 2015. Next come I-380 (2), CR-F52/BLACK Diamond Rd Sw (1) and US-218 (1).
Garbage & waste trucks
20 crashes involved a garbage or refuse truck, a 1.7% share (Iowa: 2.2%).
Their busiest month is May, with 15% of garbage-truck crashes.
Route planning tips for ZIP 52340 fleets
- Review driver schedules for January, the month with the most truck crashes.
- Look at alternatives to I-80 at busy times: it leads this area in fatal truck crashes.
- For residential and commercial waste routes, look again at May schedules: garbage-truck crashes peak then.
- With 20.1% of truck crashes on snow, slush or ice (above Iowa), plan winter equipment checks early.
- Paste your stops into the free Route Planner to see the risk score, safer alternatives and low bridges.
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 Johnson County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| I-80 | 11 |
| I-380 | 2 |
| CR-F52/BLACK Diamond Rd Sw | 1 |
| US-218 | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Johnson County) |
|---|---|
| I-80 | 76 |
| Interstate 80/I 80 | 63 |
| I-380 | 29 |
| Interstate 380/I 380 | 28 |
| US-218 | 23 |
| US-6 | 15 |
| State 1/Iowa 1 | 6 |
| Ia 1 | 5 |
ZIP 52340 at a glance
| Population | 6,128 |
| Density | 124 per sq mi |
| Median household income | $98,393 |
| Median home value | $348,315 |
| Home ownership | 77% |
Waste facilities and haulers nearby
Historical data: truck crashes in Johnson 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 | 40 | — | 1.7 |
| 2000s | 71 | +79% | 2.2 |
| 2010s | 92 | +29% | 1.7 |
| 2020s | 100 | +9% | 2.0 |
From the 1990s to the 2020s, yearly reported truck crashes went from 40 to 100. Some of the change may reflect how crashes were reported. NHTSA counts 2.5 fatal large-truck crashes a year in 2016–19 and 2.0 a year in 2020–24.
Nearby ZIP codes
Questions fleets ask about ZIP 52340
How many truck accidents are there in ZIP 52340?
Johnson County has had 1,147 reported truck crashes since 2015, injuring 466 people and killing 40.
Which road has the most fatal truck crashes in ZIP 52340?
NHTSA data shows I-80 with 11 fatal large-truck crashes within 10 miles of ZIP 52340 since 2015, the highest of any road.
Which month has the most truck crashes in ZIP 52340?
January has the most truck crashes in Johnson County, 12.4% of the yearly total.
How many garbage truck accidents happen in ZIP 52340?
20 crashes involving garbage or refuse trucks have been reported in Johnson County since 2015, 1.7% of all truck crashes.
How does ZIP 52340 compare with Iowa for truck crashes?
Per 100,000 residents, Johnson County has 61.7 truck crashes a year; Iowa has 68.1.
How can I plan a safer truck route in ZIP 52340?
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.