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Traffic heat map of Northampton County, Pennsylvania: 667 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Hill to Hill Bridge

Northampton County, Pennsylvania Traffic Counts

Our Northampton County, Pennsylvania traffic data covers 17,970 road segments over 667 road miles, with an average segment of just 196 ft. Its busiest road, Hill to Hill Bridge, carries 49,902 vehicles a day, 8.1 times the average road. Whether you are evaluating a new retail location, planning routes or assessing infrastructure, these numbers replace guesswork.
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 Northampton County, Pennsylvania

Traffic

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

vehicles per day6,192
Trucks

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

9.0%
Average travel time

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

32.1 min
Congestion ratio

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

17.4%
Drivers’ average age

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

49.4 yrs
Drivers’ average income

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

$95,174

A typical monitored road in Northampton County, Pennsylvania sees 6,192 vehicles per day, while its 667 miles of monitored roads together handle 5,203,191 vehicle-miles traveled per day (≈1.9 billion per year). About 1 in 11 vehicles is a truck, fewer than the 1 in 9 across Pennsylvania.

Busier roads than 88% of counties in Pennsylvania

At 6,192 vehicles per day, the average road in Northampton carries somewhat more traffic than the state average of 5,617 (10% more) - a critical factor for logistics and site planning. In total volume terms, its road network carries about 2.4% of Pennsylvania's statewide total of vehicle-miles. By volume, Northampton's 6,192 vehicles per day outpaces 88% of counties in Pennsylvania.

At 32.1 minutes, the average travel time is 7% lower than the state level. On travel time, Northampton runs shorter than 80% of counties in Pennsylvania.

Congestion is somewhat higher than the state level, at a ratio of 17.4% (5% higher).

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Northampton County, Pennsylvania

Trafficvehicles per day15,246
Trucks13.0%
Average travel time41.0 min
Congestion ratio35.9%
Drivers’ average age49.1 yrs
Drivers’ average income$94,393

Highways carry about half of all travel in Northampton County, Pennsylvania, 46% of vehicle-miles. The average highway carries 15,246 vehicles per day, 166% more than the average non-highway road in the same area, which carries 5,741 vehicles per day.

With 18% of the road miles (119 miles in 853 segments), highways punch above their length, carrying 2,399,295 vehicle-miles traveled per day (≈876 million per year).

By highway travel volume, Northampton outranks 76% of counties in Pennsylvania.

More highway trucks than 83% of counties in Pennsylvania

Highway truck concentration here runs 18% lower than the state average, at 13.0%. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.

Northampton's highway truck share (13.0%) is lower than 71% of counties in Pennsylvania. 83% of counties in Pennsylvania see fewer highway trucks per day than Northampton's roughly 1,977.

non-highway traffic icon

Non-highway Traffic in Northampton County, Pennsylvania

Trafficvehicles per day5,741
Trucks5.6%
Average travel time31.7 min
Congestion ratio16.4%
Drivers’ average age49.7 yrs
Drivers’ average income$95,586

Local roads carry about half of all travel in Northampton County, Pennsylvania, 54% of vehicle-miles. The average non-highway road carries 5,741 vehicles per day.

Spread over 548 miles and 17,117 segments, 82% of the road network, local roads carry a lighter load per mile: 2,803,896 vehicle-miles traveled per day (≈1.0 billion per year). About 1 in 18 vehicles on non-highway roads is a truck (5.6%).

Drivers from higher-income areas than 92% of counties in Pennsylvania

Compared to highways, non-highway routes see 57% fewer trucks by share.

At 16.4%, the non-highway congestion ratio matches the state level closely.

Northampton's average driver income is higher than 92% of counties in Pennsylvania. Northampton's median driver age is lower than 65% of counties in Pennsylvania.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

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

Northampton County vs. Pennsylvania Traffic Comparison

Of the four measures, highway truck share differs most: Northampton County runs 18% below the Pennsylvania average. Its truck share is also 15% below.

MetricNorthampton CountyPennsylvania averageDifference
Traffic6,1925,617+10.2%
Truck % (Total Traffic)9.0%10.6%-15.4%
Truck % (Highway)13.0%15.8%-17.7%
Avg. Travel Time32.1 min34.6 min-7.2%

How Northampton County compares

Northampton County has the lowest truck share of its nearby counties

Nothing in this table sets Northampton County sharply apart from the 4 areas nearest to it, though it has the second busiest roads of the five. Bigger and busier at once: more road than the areas around it and heavier traffic on it, which makes it the centre of gravity for travel in this part of the map.

Northampton 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
Northampton County6,1929.0%5,203,19132.1 min17.4%
Lehigh County, Pennsylvania7,0109.9%6,235,56933.7 min18.2%
Monroe County, Pennsylvania5,44210.4%3,655,76830.6 min17.3%
Carbon County, Pennsylvania3,46913.5%1,488,49633.6 min9.9%
Warren County, New Jersey4,38512.7%2,616,02034.2 min15.1%
Pennsylvania average5,61710.6%N/A34.6 min16.5%

Northampton County ranked within Pennsylvania

Northampton County sits in the top quarter of the Pennsylvania field on average driver income, at #6 of 67.

Northampton County ranked among 67 county-level areas in Pennsylvania (1 = highest); measures without data in every county rank a smaller field, down to 64.
MeasureNorthampton CountyPennsylvania rank
Traffic volume (AADT)6,192#9 of 67
Highway vehicle-miles per day2,399,295#16 of 64
Truck share on highways13.0%#46 of 64
Highway trucks per day1,977#12 of 64
Average travel time32.1 min#53 of 67
Average driver income$95,174#6 of 67
Average driver age49.4 yrs#44 of 67

The two ends of this table sit far apart: #6 of 67 on average driver income, against #53 of 67 on average travel time.

Busiest roads in Northampton County, Pennsylvania

The three busiest roads in Northampton County average 47,926 vehicles a day, 7.7 times the county average of 6,192 across all its monitored roads.

Hill to Hill Bridge leads with 49,902 vehicles a day, 3,043 of them trucks (6.1%). Lehigh Valley Thruway is practically level with it at 49,238. I 78 carries the most trucks, 9,278 a day (20.9% of its traffic), although it ranks #4 for all traffic.

Freight stands out on I 78: trucks are 20.9% of the traffic there, against 9.0% county-wide.

Trips using I 78 are long: a median of 56.7 minutes against 32.1 county-wide, the mark of a through route.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Hill to Hill BridgeTrunk road · 49,902vehicles3,043trucks · 6.1%
Road class
Trunk road
Median trip time
30.9 min
Drivers’ median age
47.3 yrs
Drivers’ average income
$80,297

Hill to Hill Bridge is a trunk route for the county, carrying 8.1 times the county average on its busiest stretch; trucks are 6.1% of it, below the county-wide 9.0%.

2Lehigh Valley ThruwayMotorway · 49,238vehicles4,903trucks · 10.0%
Road class
Motorway
Congestion ratio
48.3%
Median trip time
37.0 min
Drivers’ median age
48.5 yrs
Drivers’ average income
$94,697

Travel on Lehigh Valley Thruway's busiest stretch runs 48% over free-flow time, against 17% across the county, so expect slower peak hours.

3PA 33Motorway · 44,636vehicles5,101trucks · 11.4%
Road class
Motorway
Congestion ratio
46.6%
Median trip time
41.2 min
Drivers’ median age
50.4 yrs
Drivers’ average income
$96,630

PA 33 is one of the more congested roads here: trips take 47% longer than at free-flow speed, against 17% county-wide.

4I 78Motorway · 44,410vehicles9,278trucks · 20.9%
Road class
Motorway
Congestion ratio
42.3%
Median trip time
56.7 min
Drivers’ median age
49.5 yrs
Drivers’ average income
$104,825

I 78 carries 7.2 times the county average at its busiest, 9,278 of them trucks (20.9%, above the county-wide 9.0%).

5Gene Hartzell Memorial BridgeMotorway · 43,317vehicles4,224trucks · 9.8%
Road class
Motorway
Median trip time
44.2 min
Drivers’ median age
50.2 yrs
Drivers’ average income
$106,393

Drivers on Gene Hartzell Memorial Bridge are on long journeys, a median 44.2 minutes against 32.1 county-wide: a through route more than a local street.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 78Motorway · #4 by traffic44,410vehicles9,278trucks · 20.9%
2PA 33Motorway · #3 by traffic44,636vehicles5,101trucks · 11.4%
3Lehigh Valley ThruwayMotorway · #2 by traffic49,238vehicles4,903trucks · 10.0%
4Gene Hartzell Memorial BridgeMotorway · #5 by traffic43,317vehicles4,224trucks · 9.8%
5Hill to Hill BridgeTrunk road · #1 by traffic49,902vehicles3,043trucks · 6.1%
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

NorthamptonDepartment 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 Northampton County

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

Need segment-level traffic data?

Identify traffic patterns street by street and analyze the exact corridors that matter to your project.