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Traffic heat map of Hunterdon County, New Jersey: 473 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Phillipsburg-Newark Expressway

Hunterdon County, New Jersey Traffic Counts

Our Hunterdon County, New Jersey traffic data covers 12,214 road segments over 473 road miles, with an average segment of just 205 ft. Its highways carry one of the top 5 truck shares of any county in New Jersey. 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 Hunterdon County, New Jersey

Traffic

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

vehicles per day5,230
Trucks

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

11.0%
Average travel time

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

35.4 min
Congestion ratio

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

14.0%
Drivers’ average age

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

50.6 yrs
Drivers’ average income

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

$147,803

A typical monitored road in Hunterdon County, New Jersey sees 5,230 vehicles per day, while its 473 miles of monitored roads together handle 3,591,634 vehicle-miles traveled per day (≈1.3 billion per year). At 11.0%, the truck share runs above the 7.9% across New Jersey: about 1 in 9 vehicles.

Longer trips than 95% of counties in New Jersey

Hunterdon's average daily traffic volume is 41% lower than the state average - 5,230 vehicles per day against 8,886 - suggesting less traffic load per road - lighter roads for freight, but less passing trade for roadside retail. Network-wide, Hunterdon accounts for about 2.3% of New Jersey's statewide total of vehicle-miles. Hunterdon carries less traffic than 85% of counties in New Jersey.

The average trip takes 35.4 minutes, 6% higher than the state level. Its average travel time of 35.4 minutes is longer than 95% of counties in New Jersey.

At 48% lower than the state level, the 14.0% congestion ratio signals smoother traffic flow - fewer delays make delivery windows more reliable.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Hunterdon County, New Jersey

Trafficvehicles per day16,392
Trucks14.1%
Average travel time45.1 min
Congestion ratio43.4%
Drivers’ average age50.5 yrs
Drivers’ average income$141,819

A little more than half of the driving in Hunterdon County, New Jersey happens on highways: 67% of all vehicle-miles. The average highway carries 16,392 vehicles per day, 341% more than the average non-highway road in the same area, which carries 3,713 vehicles per day.

Highways make up 26% of the monitored road miles (121 miles, 1,461 segments), so they carry more than their share: 2,401,681 vehicle-miles traveled per day (≈877 million per year).

Higher highway truck share than 80% of counties in New Jersey

The concentration of trucks on highways (14.1%) is 38% higher than the state average for similar road classifications. Highways here lean toward freight, so highway access is a real asset for logistics operators.

By truck concentration, highways here outrank 80% of counties in New Jersey. 70% of counties in New Jersey see fewer highway trucks per day than Hunterdon's roughly 2,311.

non-highway traffic icon

Non-highway Traffic in Hunterdon County, New Jersey

Trafficvehicles per day3,713
Trucks4.7%
Average travel time34.1 min
Congestion ratio10.1%
Drivers’ average age51.3 yrs
Drivers’ average income$155,976

A significant share of driving in Hunterdon County, New Jersey, 33% of vehicle-miles, happens on local roads. On the average non-highway road, that comes to 3,713 vehicles per day.

Spread over 352 miles and 10,753 segments, 74% of the road network, local roads carry a lighter load per mile: 1,189,953 vehicle-miles traveled per day (≈434 million per year). About 1 in 21 vehicles on non-highway roads is a truck (4.7%).

Drivers from higher-income areas than 90% of counties in New Jersey

Non-highway roads carry a truck concentration that's 66% lower than the highway network.

The non-highway congestion ratio of 10.1% is 59% lower than the state level, suggesting more efficient local mobility than the state average.

Hunterdon's average driver income is higher than 90% of counties in New Jersey. Hunterdon's median driver age is higher than 90% of counties in New Jersey.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–9:00 AM and PM peak 4:00 PM–6:00 PM, with volumes reaching approximately 84% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 13% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
April–June is the high season, with volumes +8% versus the annual average.
Lowest month:
January is the quietest month, with volumes -7% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Hunterdon County, New Jersey, the peak hour concentrates about 8% of the day's traffic, and there is a noticeable seasonal swing of +8% in high season.

Hunterdon County vs. New Jersey Traffic Comparison

Hunterdon County's biggest difference from the New Jersey average is its average daily traffic per road, 41% below it. Its truck share, by contrast, is 39% above.

MetricHunterdon CountyNew Jersey averageDifference
Traffic5,2308,886-41.1%
Truck % (Total Traffic)11.0%7.9%+38.6%
Truck % (Highway)14.1%10.2%+38.1%
Avg. Travel Time35.4 min33.4 min+6.1%

How Hunterdon County compares

Hunterdon County against nearby counties

Compared with its 4 closest neighbours, Hunterdon County is 31.0% less congested; it has the fourth busiest roads of the five. Less traffic and more room for it - the roads here run both quieter and freer than the areas around them.

Hunterdon County and the 4 nearest county-level areas by centroid distance, with the New Jersey average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Hunterdon County5,23011.0%3,591,63435.4 min14.0%
Somerset County, New Jersey7,8547.8%7,289,29333.0 min23.1%
Bucks County, Pennsylvania7,3036.4%10,013,19932.9 min20.1%
Mercer County, New Jersey7,8499.6%5,871,43535.4 min23.1%
Warren County, New Jersey4,38512.7%2,616,02034.2 min15.1%
New Jersey average8,8867.9%N/A33.4 min27.0%

Hunterdon County ranked within New Jersey

Hunterdon County sits in New Jersey's top three on average travel time, average driver income and average driver age.

Hunterdon County ranked among 21 county-level areas in New Jersey (1 = highest).
MeasureHunterdon CountyNew Jersey rank
Traffic volume (AADT)5,230#18 of 21
Highway vehicle-miles per day2,401,681#15 of 21
Truck share on highways14.1%#5 of 21
Highway trucks per day2,311#7 of 21
Average travel time35.4 min#2 of 21
Average driver income$147,803#3 of 21
Average driver age50.6 yrs#3 of 21

The two ends of this table sit far apart: #2 of 21 on average travel time, against #18 of 21 on average daily traffic volume.

Busiest roads in Hunterdon County, New Jersey

On their busiest stretches, the three busiest roads in Hunterdon County carry 44,272 vehicles a day on average, 8.5 times the typical road in the county (5,230).

Phillipsburg-Newark Expressway leads with 73,241 vehicles a day, 13,672 of them trucks (18.7%). That is 2.4 times the next road, Route 31 (CR 513) (31,092). It also carries the most trucks.

Phillipsburg-Newark Expressway carries longer journeys than most roads here, with a median trip of 53.2 minutes against 35.4 county-wide.

Freight stands out on Phillipsburg-Newark Expressway: trucks are 18.7% of the traffic there, against 11.0% county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Phillipsburg-Newark ExpresswayMotorway · 73,241vehicles13,672trucks · 18.7%
Road class
Motorway
Congestion ratio
49.2%
Median trip time
53.2 min
Drivers’ median age
49.9 yrs
Drivers’ average income
$132,210

At 14.0 times the county average, Phillipsburg-Newark Expressway draws drivers from neighborhoods averaging $132,210 in household income.

2Route 31 (CR 513)Trunk road · 31,092vehicles1,741trucks · 5.6%
Road class
Trunk road
Congestion ratio
54.1%
Median trip time
32.7 min
Drivers’ median age
50.4 yrs
Drivers’ average income
$137,924

Route 31 (CR 513) is one of the more congested roads here: trips take 54% longer than at free-flow speed, against 14% county-wide.

3US 202Trunk road · 28,484vehicles2,336trucks · 8.2%
Road class
Trunk road
Congestion ratio
34.7%
Median trip time
45.8 min
Drivers’ median age
51.2 yrs
Drivers’ average income
$160,036

A main artery: US 202's busiest stretch carries 5.4 times the county average; trucks are 8.2% of it, below the county-wide 11.0%.

4NJ 31Trunk road · 23,305vehicles1,303trucks · 5.6%
Road class
Trunk road
Congestion ratio
55.5%
Median trip time
36.1 min
Drivers’ median age
50.9 yrs
Drivers’ average income
$156,690

Delays build on NJ 31: its congestion ratio of 56% over free-flow time is well above the county's 14%.

5US 22Trunk road · 20,953vehicles1,286trucks · 6.1%
Road class
Trunk road
Congestion ratio
25.5%
Median trip time
28.6 min
Drivers’ median age
50.7 yrs
Drivers’ average income
$147,961

US 22 carries 4.0 times the county average at its busiest, 1,286 of them trucks (6.1%, below the county-wide 11.0%).

Ranked by trucks per day

Cars and light vehiclesTrucks
1Phillipsburg-Newark ExpresswayMotorway · #1 by traffic73,241vehicles13,672trucks · 18.7%
2US 202Trunk road · #3 by traffic28,484vehicles2,336trucks · 8.2%
3Route 31 (CR 513)Trunk road · #2 by traffic31,092vehicles1,741trucks · 5.6%
4NJ 31Trunk road · #4 by traffic23,305vehicles1,303trucks · 5.6%
5US 22Trunk road · #5 by traffic20,953vehicles1,286trucks · 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

HunterdonDepartment 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 Hunterdon County

The same traffic breakdown for the areas closest to Hunterdon County, New Jersey.

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