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Traffic heat map of Sullivan County, Pennsylvania: 91 miles of roads shaded from blue (light) to red (heavy traffic), busiest on German Street and Mill Street

Sullivan County, Pennsylvania Traffic Counts

How busy are the roads of Sullivan County, Pennsylvania? We measure 91 road miles, divided into 769 segments, with multi-sourced, cross-verified mobile and sensor data. Its roads are the quietest of any county in Pennsylvania, at 1,210 vehicles a day on average. The breakdown below covers volume, trucks, congestion and driver profiles for retailers, logistics planners and engineers.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
Updated:
September 29, 2026
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Total Traffic Volume & Performance in Sullivan County, Pennsylvania

Traffic

The average number of vehicles that travel each day over any road in the road network.

vehicles per day1,210
Trucks

The percentage of the total traffic volume composed of heavy vehicles.

10.0%
Average travel time

The average time of travel averaged among all vehicles traveling on the road network.

36.1 min
Congestion ratio

The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.

3.9%
Drivers’ average age

Average age of residents in the geographic areas where the vehicle trips originated.

57.4 yrs
Drivers’ average income

Average income of residents in the geographic areas where the vehicle trips originated.

$71,541

The average monitored road in Sullivan County, Pennsylvania carries 1,210 vehicles per day. Across its 91 miles of monitored roads, that adds up to 108,004 vehicle-miles traveled per day (≈39.4 million per year). Trucks are 10.0% of traffic, close to the 10.6% across Pennsylvania.

The quietest roads of any county in Pennsylvania

Sullivan sees 78% lower average daily traffic volume than the state average (1,210 vehicles per day against 5,617), suggesting less demand on each road - very light roads: easy truck access, but little passing trade for roadside retail. Network-wide, Sullivan accounts for less than 0.1% of Pennsylvania's statewide total of vehicle-miles. At 1,210 vehicles per day, Sullivan posts the lowest average traffic volume in Pennsylvania.

At 36.1 minutes, the average travel time matches the state level closely. 80% of counties in Pennsylvania have a shorter average travel time than Sullivan's 36.1 minutes.

At 76% lower than the state level, the 3.9% congestion ratio signals smoother traffic flow - delays are rare enough to plan travel times almost to the minute.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Sullivan County, Pennsylvania

Trafficvehicles per day2,526
Trucks11.7%
Average travel time51.1 min
Congestion ratio5.9%
Drivers’ average age57.6 yrs
Drivers’ average income$71,038

A little more than half of the driving in Sullivan County, Pennsylvania happens on highways: 56% of all vehicle-miles. The average highway carries 2,526 vehicles per day, 220% more than the average non-highway road in the same area, which carries 790 vehicles per day.

With 26% of the road miles (24 miles in 186 segments), highways punch above their length, carrying 60,729 vehicle-miles traveled per day (≈22.2 million per year).

Fewer highway trucks than 98% of counties in Pennsylvania

The concentration of trucks on highways (11.7%) is 25% lower than the state average for similar road classifications. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.

76% of counties in Pennsylvania see a higher highway truck share than Sullivan's 11.7%. By raw truck volume, Sullivan carries fewer highway trucks than 98% of counties in Pennsylvania.

non-highway traffic icon

Non-highway Traffic in Sullivan County, Pennsylvania

Trafficvehicles per day790
Trucks7.8%
Average travel time31.3 min
Congestion ratio3.3%
Drivers’ average age57.2 yrs
Drivers’ average income$72,516

Local roads carry a significant share of travel in Sullivan County, Pennsylvania: 44% of all vehicle-miles. A typical local road sees 790 vehicles per day.

Local roads make up 74% of the monitored road miles (68 miles in 583 segments) but carry less than their share of travel: 47,275 vehicle-miles traveled per day (≈17.3 million per year). Trucks make up 7.8% of non-highway traffic, about 1 in 13 vehicles.

The oldest drivers of any county in Pennsylvania

Non-highway roads carry a truck concentration that's 33% lower than the highway network.

The non-highway congestion ratio of 3.3% is 79% lower than the state level, suggesting more efficient local mobility than the state average.

Sullivan's average driver income is higher than 53% of counties in Pennsylvania. At 57 years, Sullivan's median driver age is the highest in Pennsylvania.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

In Sullivan County, Pennsylvania, the peak hour concentrates about 7% of the day's traffic.

Sullivan County vs. Pennsylvania Traffic Comparison

Sullivan County's biggest difference from the Pennsylvania average is its average daily traffic per road, 78% below it. Its highway truck share is also 25% below.

MetricSullivan CountyPennsylvania averageDifference
Traffic1,2105,617-78.5%
Truck % (Total Traffic)10.0%10.6%-5.7%
Truck % (Highway)11.7%15.8%-25.5%
Avg. Travel Time36.1 min34.6 min+4.2%

How Sullivan County compares

Sullivan County moves the least traffic of its nearby counties

Against the 4 nearest areas, Sullivan County moves 7.9% of the total daily travel and is 71.2% less congested; it has the quietest roads of the five. Less traffic and more room for it - the roads here run both quieter and freer than the areas around them.

Sullivan County and the 4 nearest county-level areas by centroid distance, with the Pennsylvania average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Sullivan County1,21010.0%108,00436.1 min3.9%
Bradford County, Pennsylvania3,1399.1%1,007,98633.0 min11.7%
Wyoming County, Pennsylvania2,7727.5%617,25135.5 min15.7%
Lycoming County, Pennsylvania3,94410.2%2,259,71233.6 min13.7%
Columbia County, Pennsylvania3,39015.4%1,553,87833.0 min13.2%
Pennsylvania average5,61710.6%N/A34.6 min16.5%

Sullivan County ranked within Pennsylvania

Sullivan County posts the highest average driver age of any county-level area in Pennsylvania.

Sullivan County ranked among 67 county-level areas in Pennsylvania (1 = highest); measures without data in every county rank a smaller field, down to 64.
MeasureSullivan CountyPennsylvania rank
Traffic volume (AADT)1,210#67 of 67
Highway vehicle-miles per day60,729#63 of 64
Truck share on highways11.7%#49 of 64
Highway trucks per day297#63 of 64
Average travel time36.1 min#14 of 67
Average driver income$71,541#32 of 67
Average driver age57.4 yrs#1 of 67

The two ends of this table sit far apart: #1 of 67 on average driver age, against #67 of 67 on average daily traffic volume.

Busiest roads in Sullivan County, Pennsylvania

The three busiest roads in Sullivan County average 3,396 vehicles a day, 2.8 times the county average of 1,210 across all its monitored roads.

German Street leads with 4,495 vehicles a day, 541 of them trucks (12.1%). It also carries the most trucks.

US 220 carries longer journeys than most roads here, with a median trip of 52.2 minutes against 36.1 county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1German StreetTrunk road · 4,495vehicles541trucks · 12.1%
Road class
Trunk road
Congestion ratio
11.0%
Median trip time
50.9 min
Drivers’ median age
56.5 yrs
Drivers’ average income
$56,567

On its busiest stretch, German Street carries 3.7 times the county average; trucks are 12.1% of it, above the county-wide 10.0%.

2Mill StreetSecondary road · 3,150vehicles218trucks · 6.9%
Road class
Secondary road
Congestion ratio
7.7%
Median trip time
27.0 min
Drivers’ median age
55.8 yrs
Drivers’ average income
$62,431

Mill Street peaks at 3,150 vehicles a day, 2.6 times the county average; trucks are 6.9% of it, below the county-wide 10.0%.

3Appalachian ThruwayTrunk road · 2,544vehicles324trucks · 12.7%
Road class
Trunk road
Congestion ratio
4.4%
Median trip time
49.5 min
Drivers’ median age
56.3 yrs
Drivers’ average income
$58,784

Appalachian Thruway carries 2.1 times the county average at its busiest, 324 of them trucks (12.7%, above the county-wide 10.0%).

4Cliff AvenueTrunk road · 2,540vehicles278trucks · 10.9%
Road class
Trunk road
Congestion ratio
6.6%
Median trip time
50.9 min
Drivers’ median age
58.0 yrs
Drivers’ average income
$74,949

Drivers on Cliff Avenue are on long journeys, a median 50.9 minutes against 36.1 county-wide: a through route more than a local street.

5US 220Trunk road · 2,532vehicles290trucks · 11.4%
Road class
Trunk road
Congestion ratio
5.7%
Median trip time
52.2 min
Drivers’ median age
57.9 yrs
Drivers’ average income
$74,677

US 220 carries 2.1 times the county average on its busiest stretch, where the median trip lasts 52.2 minutes.

Ranked by trucks per day

Cars and light vehiclesTrucks
1German StreetTrunk road · #1 by traffic4,495vehicles541trucks · 12.1%
2Appalachian ThruwayTrunk road · #3 by traffic2,544vehicles324trucks · 12.7%
3Route 220 HighwayTrunk road · 2,511vehicles304trucks · 12.1%
Road class
Trunk road
Congestion ratio
5.7%
Median trip time
51.7 min
Drivers’ median age
57.0 yrs
Drivers’ average income
$72,974

Route 220 Highway carries through traffic: the median trip using it lasts 51.7 minutes, against 36.1 for the county.

4US 220Trunk road · #5 by traffic2,532vehicles290trucks · 11.4%
5Cliff AvenueTrunk road · #4 by traffic2,540vehicles278trucks · 10.9%
How to read these road counts
  • The first number is AADT, annual average daily traffic: the vehicles passing a point on an average day, both directions combined and trucks included. On a divided highway both carriageways are added together.
  • Traffic changes along a road, with more near interchanges and towns and less in open country. Every figure for a road describes its busiest stretch in the county, so the two rankings show the same numbers for the same road.
  • The second number is the trucks on that stretch, a part of its AADT. The bar splits the AADT into cars and light vehicles (blue) and trucks (amber).
  • See segment-level AADT for any road on TrafficZoom.

Data Sources & Methodology

The data presented on this page is derived from TrafficZoom's proprietary analytics platform, which aggregates and normalizes information from multiple sources, including:

Mobile device location data (anonymized and aggregated)

Road sensor networks and traffic counters

Historical traffic pattern databases

Public traffic count programs published by the

SullivanDepartment of Transportation

Demographic Baseline for O-D Modeling

U.S. Census Bureau
All metrics represent estimates based on statistical modeling and are intended for strategic planning purposes.
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Data current as of:
Q3 2026

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Counties near Sullivan County

The same traffic breakdown for the areas closest to Sullivan County, Pennsylvania.

Need segment-level traffic data?

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