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Traffic heat map of Northumberland County, Pennsylvania: 459 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Susquehanna Trail

Northumberland County, Pennsylvania Traffic Counts

TrafficZoom tracks traffic on 459 road miles in Northumberland County, Pennsylvania, divided into 6,593 segments averaging 367 ft. Its busiest road, Susquehanna Trail, carries 34,903 vehicles a day, 9.2 times the average road. Built from cross-verified mobile and road-sensor data, these counts help you size up a retail site, plan logistics routes or assess infrastructure needs.
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 Northumberland County, Pennsylvania

Traffic

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

vehicles per day3,797
Trucks

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

11.2%
Average travel time

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

33.8 min
Congestion ratio

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

12.3%
Drivers’ average age

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

50.8 yrs
Drivers’ average income

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

$68,411

A typical monitored road in Northumberland County, Pennsylvania sees 3,797 vehicles per day, while its 459 miles of monitored roads together handle 1,772,967 vehicle-miles traveled per day (≈647 million per year). Trucks are 11.2% of traffic, close to the 10.6% across Pennsylvania.

Traffic 32% below the Pennsylvania average

At 3,797 vehicles per day, the average monitored road in Northumberland carries 32% less traffic than the state average of 5,617, suggesting less demand on each road - lighter roads for freight, but less passing trade for roadside retail. Across the whole network, that travel is about 0.8% of Pennsylvania's statewide total. 58% of counties in Pennsylvania see less traffic than Northumberland's 3,797 vehicles per day.

The average trip takes 33.8 minutes, on par with the state level. On travel time, Northumberland runs longer than 59% of counties in Pennsylvania.

At 25% lower than the state level, the 12.3% congestion ratio signals smoother traffic flow - travel times are easy to plan around for scheduled deliveries.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Northumberland County, Pennsylvania

Trafficvehicles per day13,178
Trucks20.6%
Average travel time47.2 min
Congestion ratio28.8%
Drivers’ average age49.8 yrs
Drivers’ average income$70,530

Highways carry a significant share of travel in Northumberland County, Pennsylvania: 33% of all vehicle-miles. The average highway carries 13,178 vehicles per day, 286% more than the average non-highway road in the same area, which carries 3,417 vehicles per day.

Highways make up 14% of the monitored road miles (66 miles, 257 segments), so they carry more than their share: 585,940 vehicle-miles traveled per day (≈214 million per year).

Freight-heavy highways

Highway truck concentration here runs 31% higher than the state average, at 20.6%. Highways here lean toward freight, so highway access is a real asset for logistics operators.

Northumberland's highway truck share (20.6%) is higher than 65% of counties in Pennsylvania. By raw truck volume, Northumberland carries fewer highway trucks than 51% of counties in Pennsylvania.

non-highway traffic icon

Non-highway Traffic in Northumberland County, Pennsylvania

Trafficvehicles per day3,417
Trucks6.5%
Average travel time33.3 min
Congestion ratio11.7%
Drivers’ average age51.4 yrs
Drivers’ average income$67,999

A little more than half of the driving in Northumberland County, Pennsylvania happens on local roads: 67% of all vehicle-miles. On the average non-highway road, that comes to 3,417 vehicles per day.

Spread over 393 miles and 6,336 segments, 86% of the road network, local roads carry a lighter load per mile: 1,187,027 vehicle-miles traveled per day (≈433 million per year). About 1 in 15 vehicles on non-highway roads is a truck (6.5%).

Local roads carry 68% fewer trucks by share than highways

Compared to highways, non-highway routes see 68% fewer trucks by share.

The non-highway congestion ratio of 11.7% is 26% lower than the state level, suggesting more efficient local mobility than the state average.

Northumberland's average driver income is lower than 58% of counties in Pennsylvania. The driver population here skews older than 55% of counties in Pennsylvania.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

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

Northumberland County vs. Pennsylvania Traffic Comparison

Northumberland County's biggest difference from the Pennsylvania average is its average daily traffic per road, 32% below it. Its highway truck share, by contrast, is 31% above.

MetricNorthumberland CountyPennsylvania averageDifference
Traffic3,7975,617-32.4%
Truck % (Total Traffic)11.2%10.6%+5.2%
Truck % (Highway)20.6%15.8%+30.8%
Avg. Travel Time33.8 min34.6 min-2.3%

How Northumberland County compares

Northumberland County moves more traffic than any nearby county

Northumberland County tracks the 4 areas around it closely - no measure in this table sets it far apart from the areas immediately next to it, though it has the busiest roads of the five. The same kind of road, simply more of it: traffic per road matches the areas around it while the network itself is larger.

Northumberland 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
Northumberland County3,79711.2%1,772,96733.8 min12.3%
Montour County, Pennsylvania3,70018.5%648,03235.0 min16.8%
Columbia County, Pennsylvania3,39015.4%1,553,87833.0 min13.2%
Union County, Pennsylvania3,75717.0%1,084,77734.4 min11.5%
Snyder County, Pennsylvania3,3439.7%835,79032.2 min11.4%
Pennsylvania average5,61710.6%N/A34.6 min16.5%

Northumberland County ranked within Pennsylvania

On all 7 measures below, Northumberland County lands in the middle of the Pennsylvania field rather than at either end.

Northumberland County ranked among 67 county-level areas in Pennsylvania (1 = highest); measures without data in every county rank a smaller field, down to 64.
MeasureNorthumberland CountyPennsylvania rank
Traffic volume (AADT)3,797#29 of 67
Highway vehicle-miles per day585,940#45 of 64
Truck share on highways20.6%#23 of 64
Highway trucks per day2,715#33 of 64
Average travel time33.8 min#28 of 67
Average driver income$68,411#39 of 67
Average driver age50.8 yrs#31 of 67

Busiest roads in Northumberland County, Pennsylvania

On their busiest stretches, the three busiest roads in Northumberland County carry 27,268 vehicles a day on average, 7.2 times the typical road in the county (3,797).

Susquehanna Trail leads with 34,903 vehicles a day, 2,607 of them trucks (7.5%). I 80 carries the most trucks, 9,964 a day (37.3% of its traffic), although it ranks #2 for all traffic.

Trucks make up 37.3% of traffic on I 80, against 11.2% across all roads in the county.

I 80 carries longer journeys than most roads here, with a median trip of 57.9 minutes against 33.8 county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Susquehanna TrailTrunk road · 34,903vehicles2,607trucks · 7.5%
Road class
Trunk road
Congestion ratio
47.7%
Median trip time
40.5 min
Drivers’ median age
49.4 yrs
Drivers’ average income
$71,734

Travel on Susquehanna Trail's busiest stretch runs 48% over free-flow time, against 12% across the county, so expect slower peak hours.

2I 80Motorway · 26,738vehicles9,964trucks · 37.3%
Road class
Motorway
Congestion ratio
26.6%
Median trip time
57.9 min
Drivers’ median age
49.8 yrs
Drivers’ average income
$72,309

A main artery: I 80's busiest stretch carries 7.0 times the county average; trucks are 37.3% of it, above the county-wide 11.2%.

3PA 61 / PA 147Primary road · 20,164vehicles1,380trucks · 6.8%
Road class
Primary road
Congestion ratio
44.6%
Median trip time
37.1 min
Drivers’ median age
51.0 yrs
Drivers’ average income
$68,597

PA 61 / PA 147 is one of the more congested roads here: trips take 45% longer than at free-flow speed, against 12% county-wide.

4US 15Trunk road · 16,497vehicles1,257trucks · 7.6%
Road class
Trunk road
Median trip time
42.6 min
Drivers’ median age
50.0 yrs
Drivers’ average income
$76,346

At 4.3 times the county average, US 15 draws drivers from neighborhoods averaging $76,346 in household income.

5Danville-Riverside Bridge RoadPrimary road · 15,046vehicles906trucks · 6.0%
Road class
Primary road
Congestion ratio
34.1%
Median trip time
35.8 min
Drivers’ median age
51.4 yrs
Drivers’ average income
$82,717

The busiest stretch of Danville-Riverside Bridge Road carries 4.0 times the county average; trucks are 6.0% of it, below the county-wide 11.2%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 80Motorway · #2 by traffic26,738vehicles9,964trucks · 37.3%
2Susquehanna TrailTrunk road · #1 by traffic34,903vehicles2,607trucks · 7.5%
3I 180Motorway · 14,330vehicles2,024trucks · 14.1%
Road class
Motorway
Congestion ratio
14.3%
Median trip time
45.4 min
Drivers’ median age
51.6 yrs
Drivers’ average income
$68,668

Drivers on I 180 are on long journeys, a median 45.4 minutes against 33.8 county-wide: a through route more than a local street.

4PA 147Motorway · 12,159vehicles1,701trucks · 14.0%
Road class
Motorway
Congestion ratio
11.8%
Median trip time
41.1 min
Drivers’ median age
51.7 yrs
Drivers’ average income
$67,921

On its busiest stretch, PA 147 carries 3.2 times the county average; trucks are 14.0% of it, above the county-wide 11.2%.

5PA 61 / PA 147Primary road · #3 by traffic20,164vehicles1,380trucks · 6.8%
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

NorthumberlandDepartment 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 Northumberland County

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

Need segment-level traffic data?

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