ZIP 83421 (Chester, ID) truck route planning & crash data
Plan safer truck routes around ZIP 83421: commercial truck and garbage truck crashes here and in Fremont 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
2 of 173 truck crashes since 2015.
Deadliest roads
How Fremont County compares with Idaho
Fremont County against Idaho and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Fremont County stands out
Full comparison
| Measure (2015–2025) | Fremont County | Idaho | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 104.2 | 37.4 | 49.7 | 2.8× the state |
| Deaths per 100 crashes | 9.7 | 6.1 | 3.4 | 1.6× the state |
| Injuries per crash | 0.72 | 0.55 | 0.49 | 1.3× the state |
| Garbage-truck share | 1.2% | 1.6% | 2.3% | 22% below the state |
| On snow, slush or ice | 24.9% | 16.0% | 6.2% | 1.6× the state |
| Morning rush (6–10 am) | 18.8% | 23.0% | 23.7% | 18% below the state |
| In rain, sleet or snow | 18.8% | 10.2% | 13.8% | 1.8× the state |
| Winter months (Nov–Mar) | 31.5% | 40.9% | 41.9% | 23% below the state |
| After dark | 27.9% | 22.8% | 24.8% | 1.2× the state |
Fremont County has lower values than Idaho for garbage-truck share, morning rush (6–10 am) and winter months (nov–mar). Where it is higher: crashes per 100k residents / yr, deaths per 100 crashes and injuries per crash.
The headline for Fremont County: 18.8% share of truck crashes in rain, sleet or snow (Idaho: 10.2%).
Overview
Fremont County has recorded 173 truck crashes since 2015, with 123 people injured and 16 killed.
That averages about one truck crash every 24 days in fully reported years.
When crashes happen
Truck crashes peak in July (12.7% of the year) and are lowest in March (4.0%).
Winter months (Nov–Mar) carry 31.5% of truck crashes, vs 40.9% for Idaho.
The busiest hour is 2–3 pm, with 8.7% of truck crashes.
Snow, slush or ice was on the road in 24.9% of truck crashes, compared with 16.0% in Idaho.
Where crashes happen
Within this area, US-20 had the most fatal crashes involving a large truck since 2015 (5).
Garbage & waste trucks
Garbage trucks account for 2 of the truck crashes here, or 1.2%, compared with 1.6% in Idaho.
Route planning tips for ZIP 83421 fleets
- Plan July schedules with more margin; it is the worst month for truck crashes in Fremont County.
- Where you can, review stops along US-20; it has the most fatal large-truck crashes nearby.
- With 24.9% of truck crashes on snow, slush or ice (above Idaho), 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
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 Fremont County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| US-20 | 5 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Fremont County) |
|---|---|
| US-20 | 127 |
| North | 10 |
| Sh 33 | 6 |
| Sh 87 | 5 |
| East | 5 |
| Sh 47 | 2 |
| Ashton | 1 |
| Bridge | 1 |
ZIP 83421 at a glance
| Population | 220 |
| Density | 7 per sq mi |
| Home ownership | 100% |
Waste facilities and haulers nearby
Historical data: truck crashes in Fremont 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 | 9 | — | 0.6 |
| 2000s | 14 | +56% | 0.8 |
| 2010s | 14 | +0% | 0.8 |
| 2020s | 16 | +15% | 1.2 |
From the 1990s to the 2020s, yearly reported truck crashes went from 9 to 16. Some of the change may reflect how crashes were reported. Fatal large-truck crashes: 1.0 a year in 2016–19, 1.2 a year in 2020–24.
Nearby ZIP codes
Questions fleets ask about ZIP 83421
How common are truck crashes in ZIP 83421?
Fremont County has had 173 reported truck crashes since 2015, injuring 123 people and killing 16.
What is the most dangerous road for trucks in ZIP 83421?
US-20 had 5 fatal crashes involving a large truck within 10 miles of ZIP 83421 since 2015, more than any other road.
When do most truck crashes happen in ZIP 83421?
July has the most truck crashes in Fremont County, 12.7% of the yearly total.
Are garbage truck crashes common in ZIP 83421?
2 crashes involving garbage or refuse trucks have been reported in Fremont County since 2015, 1.2% of all truck crashes.
What is the truck crash rate in ZIP 83421 compared with Idaho?
Fremont County records 104.2 truck crashes per 100,000 residents a year, against 37.4 across Idaho.
What is the best way to plan truck routes in ZIP 83421?
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.