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Traffic heat map of Union County, New Jersey: 407 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Garden State Parkway and NJ 24

Union County, New Jersey Traffic Counts

TrafficZoom tracks traffic on 407 road miles in Union County, New Jersey, divided into 15,943 segments averaging 135 ft. It has the busiest roads of any county in New Jersey, averaging 15,365 vehicles a day. 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 Union County, New Jersey

Traffic

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

vehicles per day15,365
Trucks

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

8.3%
Average travel time

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

34.3 min
Congestion ratio

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

39.7%
Drivers’ average age

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

46.4 yrs
Drivers’ average income

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

$129,252

Our data shows 15,365 vehicles per day on the average road in Union County, New Jersey, and 8,438,338 vehicle-miles traveled per day (≈3.1 billion per year) across its 407 miles of monitored roads. About 1 in 12 vehicles is a truck, in line with New Jersey (7.9%).

The busiest roads of any county in New Jersey

Union sees 73% higher average daily traffic volume than the state average (15,365 vehicles per day against 8,886), suggesting more demand on each road - heavy exposure for roadside retail, and tight road space for deliveries. In total volume terms, its road network carries about 5.5% of New Jersey's statewide total of vehicle-miles. At 15,365 vehicles per day, Union posts the highest average traffic volume in New Jersey.

The average trip takes 34.3 minutes, on par with the state level. 65% of counties in New Jersey have a shorter average travel time than Union's 34.3 minutes.

Congestion runs 47% higher than the state level, at a ratio of 39.7%, which means more pronounced congestion - expect slower peak-hour deliveries and less predictable arrival times.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Union County, New Jersey

Trafficvehicles per day35,321
Trucks10.6%
Average travel time42.2 min
Congestion ratio69.4%
Drivers’ average age46.4 yrs
Drivers’ average income$131,496

A little more than half of the driving in Union County, New Jersey happens on highways: 63% of all vehicle-miles. The average highway carries 35,321 vehicles per day, 168% more than the average non-highway road in the same area, which carries 13,164 vehicles per day.

With 33% of the road miles (136 miles in 1,584 segments), highways punch above their length, carrying 5,317,096 vehicle-miles traveled per day (≈1.9 billion per year).

70% of counties in New Jersey move less traffic on their highways.

The most highway trucks of any county in New Jersey

At 10.6%, the highway truck share matches the state average for similar road classifications. The highway traffic mix is typical for New Jersey: neither freight- nor commuter-dominated.

By truck concentration, highways here outrank 60% of counties in New Jersey. At roughly 4,121 trucks per day, Union carries the highest volume of highway trucks in New Jersey.

non-highway traffic icon

Non-highway Traffic in Union County, New Jersey

Trafficvehicles per day13,164
Trucks4.5%
Average travel time33.4 min
Congestion ratio36.5%
Drivers’ average age46.5 yrs
Drivers’ average income$127,569

A significant share of driving in Union County, New Jersey, 37% of vehicle-miles, happens on local roads. A typical local road sees 13,164 vehicles per day.

Spread over 271 miles and 14,359 segments, 67% of the road network, local roads carry a lighter load per mile: 3,121,242 vehicle-miles traveled per day (≈1.1 billion per year). Trucks make up 4.5% of non-highway traffic, about 1 in 22 vehicles.

Younger drivers than 90% of counties in New Jersey

Compared to highways, non-highway routes see 58% fewer trucks by share.

At 50% higher than the state level, the non-highway congestion ratio of 36.5% signals more friction on local roads.

Trip origins here have higher average income than 70% of counties in New Jersey. The driver population here skews younger than 90% of counties in New Jersey.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
A long morning plateau from 7:00 AM to 12:00 PM and a long afternoon plateau from 12:00 PM to 7:00 PM, with volumes reaching approximately 56% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 16% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
Traffic is nearly flat through the year: even May–July, the busiest stretch, runs only +3% versus the annual average.
Lowest month:
January is the quietest month, with volumes -6% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Union County, New Jersey, traffic is spread evenly through the day, with the busiest hour carrying only about 6%, and traffic stays steady through the year (+3% in high season).

Union County vs. New Jersey Traffic Comparison

Union County's biggest difference from the New Jersey average is its average daily traffic per road, 73% above it. The other measures stay close to the average.

MetricUnion CountyNew Jersey averageDifference
Traffic15,3658,886+72.9%
Truck % (Total Traffic)8.3%7.9%+4.7%
Truck % (Highway)10.6%10.2%+3.3%
Avg. Travel Time34.3 min33.4 min+2.8%

How Union County compares

Union County against nearby counties

Nothing in this table sets Union County sharply apart from the 4 areas nearest to it, though it has the busiest roads of the five.

Union 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
Union County15,3658.3%8,438,33834.3 min39.7%
Richmond County, New York12,4146.0%4,268,92732.2 min29.3%
Essex County, New Jersey11,2367.5%10,979,87535.1 min34.3%
Hudson County, New Jersey12,8127.7%1,240,80739.9 min43.5%
Kings County, New York14,9347.0%9,450,97641.6 min37.6%
New Jersey average8,8867.9%N/A33.4 min27.0%

Union County ranked within New Jersey

Union County records the state's highest average daily traffic volume and highway truck volume - 2 first places in one county.

Union County ranked among 21 county-level areas in New Jersey (1 = highest).
MeasureUnion CountyNew Jersey rank
Traffic volume (AADT)15,365#1 of 21
Highway vehicle-miles per day5,317,096#7 of 21
Truck share on highways10.6%#9 of 21
Highway trucks per day3,726#1 of 21
Average travel time34.3 min#8 of 21
Average driver income$129,252#7 of 21
Average driver age46.4 yrs#19 of 21

Union County ranks #1 of 21 on average daily traffic volume but #19 of 21 on average driver age - the two describe the same roads and are worth reading together rather than either on its own.

Busiest roads in Union County, New Jersey

Traffic concentrates on a few corridors: the three busiest roads average 108,657 vehicles a day, against 15,365 on the average road in Union County.

Garden State Parkway is the busiest road, at 146,663 vehicles a day, 11,898 of them trucks (8.1%). No other road comes close: NJ 24, in second place, carries 96,961. It also carries the most trucks.

New Jersey Turnpike carries longer journeys than most roads here, with a median trip of 53.6 minutes against 34.3 county-wide.

Freight stands out on NJ 81 and Phillipsburg-Newark Expressway: trucks are 14.2% and 13.4% of the traffic there, against 8.3% county-wide.

Drivers on NJ 24 come from neighborhoods with an average household income of $170,079, 32% above the county average of $129,252, while those on Edgar Road average $92,889, 28% below it.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Garden State ParkwayMotorway · 146,663vehicles11,898trucks · 8.1%
Road class
Motorway
Congestion ratio
66.4%
Median trip time
43.3 min
Drivers’ median age
46.8 yrs
Drivers’ average income
$129,457

A main artery: Garden State Parkway's busiest stretch carries 9.5 times the county average; trucks are 8.1% of it, in line with the county-wide 8.3%.

2NJ 24Motorway · 96,961vehicles8,609trucks · 8.9%
Road class
Motorway
Congestion ratio
70.6%
Median trip time
40.6 min
Drivers’ median age
48.1 yrs
Drivers’ average income
$170,079

NJ 24 is a trunk route for the county, carrying 6.3 times the county average on its busiest stretch; trucks are 8.9% of it, above the county-wide 8.3%.

3New Jersey TurnpikeMotorway · 82,347vehicles10,429trucks · 12.7%
Road class
Motorway
Congestion ratio
92.5%
Median trip time
53.6 min
Drivers’ median age
45.9 yrs
Drivers’ average income
$125,307

Delays build on New Jersey Turnpike: its congestion ratio of 93% over free-flow time is well above the county's 40%.

4Phillipsburg-Newark ExpresswayMotorway · 69,128vehicles9,260trucks · 13.4%
Road class
Motorway
Congestion ratio
52.1%
Median trip time
43.8 min
Drivers’ median age
47.6 yrs
Drivers’ average income
$159,900

Phillipsburg-Newark Expressway peaks at 69,128 vehicles a day, 4.5 times the county average; trucks are 13.4% of it, above the county-wide 8.3%.

5Edgar RoadTrunk road · 58,743vehicles4,996trucks · 8.5%
Road class
Trunk road
Congestion ratio
48.3%
Median trip time
35.9 min
Drivers’ median age
44.2 yrs
Drivers’ average income
$92,889

Edgar Road carries 3.8 times the county average at its busiest, 4,996 of them trucks (8.5%, in line with the county-wide 8.3%).

Ranked by trucks per day

Cars and light vehiclesTrucks
1Garden State ParkwayMotorway · #1 by traffic146,663vehicles11,898trucks · 8.1%
2New Jersey TurnpikeMotorway · #3 by traffic82,347vehicles10,429trucks · 12.7%
3Phillipsburg-Newark ExpresswayMotorway · #4 by traffic69,128vehicles9,260trucks · 13.4%
4NJ 24Motorway · #2 by traffic96,961vehicles8,609trucks · 8.9%
5NJ 81Motorway · 47,415vehicles6,718trucks · 14.2%
Road class
Motorway
Congestion ratio
70.6%
Median trip time
40.8 min
Drivers’ median age
42.8 yrs
Drivers’ average income
$93,398

Travel on NJ 81's busiest stretch runs 71% over free-flow time, against 40% across the county, so expect slower peak hours.

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

UnionDepartment 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 Union County

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

Need segment-level traffic data?

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