ZIP 37686 (Piney Flats, TN) truck route planning & crash data
Plan safer truck routes around ZIP 37686: commercial truck and garbage truck crashes here and in Sullivan 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
15 of 644 truck crashes since 2015.
Deadliest roads
How Sullivan County compares with Tennessee
Sullivan County against Tennessee and the US, 2015–2025 (years with complete crash reporting). Per-resident rates make big and small places comparable.
Where Sullivan County stands out
Full comparison
| Measure (2015–2025) | Sullivan County | Tennessee | United States | vs state |
|---|---|---|---|---|
| Crashes per 100k residents / yr | 32.6 | 60.1 | 49.7 | 46% below the state |
| Deaths per 100 crashes | 4.5 | 3.9 | 3.4 | 1.2× the state |
| Injuries per crash | 0.52 | 0.48 | 0.49 | 1.1× the state |
| Garbage-truck share | 2.4% | 1.9% | 2.3% | 1.2× the state |
| On snow, slush or ice | 2.7% | 2.3% | 6.2% | 1.2× the state |
| Morning rush (6–10 am) | 20.2% | 21.8% | 23.7% | 7% below the state |
| In rain, sleet or snow | 12.0% | 14.9% | 13.8% | 20% below the state |
| Winter months (Nov–Mar) | 38.2% | 40.5% | 41.9% | same |
| After dark | 24.9% | 25.9% | 24.8% | same |
Sullivan County has lower values than Tennessee for crashes per 100k residents / yr, morning rush (6–10 am) and in rain, sleet or snow. It runs above Tennessee on deaths per 100 crashes, injuries per crash and garbage-truck share.
The headline for ZIP 37686: I-81 7 fatal truck crashes since 2015, more than any other road within 10 miles of ZIP 37686.
Overview
Police reported 644 crashes involving commercial trucks in Sullivan County since 2015: 342 people were injured and 26 were killed.
In complete reporting years that works out to about one truck crash every 7 days.
When crashes happen
August has the most truck crashes, 10.9% of the yearly total, while January has the fewest (6.7%).
November through March accounts for 38.2% of truck crashes here, compared with 40.5% in Tennessee.
The busiest hour is 10–11 am, with 7.9% of truck crashes.
2.7% of truck crashes here happened on snow, slush or ice, against 2.3% across Tennessee.
Where crashes happen
The deadliest road for trucks within 10 miles of ZIP 37686 is I-81, with 7 fatal large-truck crashes since 2015. After it: US-11E (2), US-11W (2) and CR-MOUNTAIN View Dr (1).
Garbage & waste trucks
Garbage and refuse trucks were involved in 15 crashes, 2.3% of the total, against 1.9% across Tennessee.
Route planning tips for ZIP 37686 fleets
- Build extra time into August routes: it has the most truck crashes here.
- Where you can, review stops along I-81; it has the most fatal large-truck crashes nearby.
- Icy and snowy roads show up in 2.7% of truck crashes here, more than Tennessee; schedule winter checks early.
- Check your own stops for crash hotspots and low bridges with the free Route Planner.
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 Sullivan County
By hour of day
Most dangerous roads for trucks
| Road | Fatal truck crashes since 2015 (within 10 miles) |
|---|---|
| I-81 | 7 |
| US-11E | 2 |
| US-11W | 2 |
| CR-MOUNTAIN View Dr | 1 |
| I-26 | 1 |
| SR-36 | 1 |
| SR-381 | 1 |
| SR-394 | 1 |
| US-19E | 1 |
Roads named most in all truck crash reports
| Road | Truck crashes since 2015 (Sullivan County) |
|---|---|
| I-81 | 227 |
| I-26 | 55 |
| E Stone Dr | 25 |
| SR-11W | 19 |
| Interstate 81 Hwy | 15 |
| SR-394 | 14 |
| I-81 Hwy | 12 |
| W Stone Dr | 12 |
ZIP 37686 at a glance
| Population | 9,495 |
| Density | 124 per sq mi |
| Median household income | $84,264 |
| Median home value | $362,699 |
| Home ownership | 76% |
Waste facilities and haulers nearby
Historical data: truck crashes in Sullivan 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 | 8 | — | 1.5 |
| 2000s | 40 | +375% | 2.0 |
| 2010s | 49 | +24% | 2.0 |
| 2020s | 56 | +15% | 2.2 |
Reported truck crashes averaged 8 a year in the 1990s and 56 a year in the 2020s. Reporting practices changed over time, so part of any change can come from reporting. Fatal crashes involving a large truck averaged 1.2 a year in 2016–19 and 2.2 a year in 2020–24.
Nearby ZIP codes
Questions fleets ask about ZIP 37686
How many truck crashes happen in ZIP 37686?
Sullivan County has had 644 reported truck crashes since 2015, injuring 342 people and killing 26.
Which road has the most fatal truck crashes in ZIP 37686?
Since 2015, I-81 has had the most fatal large-truck crashes within 10 miles of ZIP 37686: 7.
When do most truck crashes happen in ZIP 37686?
The worst month is August: 10.9% of truck crashes in Sullivan County happen then.
Are garbage truck crashes common in ZIP 37686?
15 crashes involving garbage or refuse trucks have been reported in Sullivan County since 2015, 2.3% of all truck crashes.
How do truck crashes in ZIP 37686 compare with Tennessee?
Per 100,000 residents, Sullivan County has 32.6 truck crashes a year; Tennessee has 60.1.
How can I plan a safer truck route in ZIP 37686?
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.