This page delivers traffic analytics for Mercer County, New Jersey. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Mercer County, New Jersey among 622 road miles divided in 18,036 segments. Our metrics go beyond simple volume counts to provide actionable insights on traffic intensity, congestion, commercial vehicle flow, and network performance with highest possible granularity (average segment length is 182 ft). Whether you are evaluating a new retail location, planning logistics routes, or assessing infrastructure needs, this data helps you move from assumptions to certainty.
Data sourced from TrafficZoom's proprietary analytics platform.
The average number of vehicles that travel each day over any road in the road network.
7,849
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
9.6%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
35.4 min
Congestion ratio
Congestion ratio
The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.
23.1%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
47.5 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$129,224
Our data indicates an estimated average traffic volume of 7,849 vehicles per day in Mercer County, New Jersey that results in 5,871,435 vehicle-miles traveled per day (≈2.1 billion per year). The traffic stream is comprised of an average of 1 truck for every 10 vehicles. Typical time spent behind the wheel per trip is 35.4 minutes, which already accounts for delays at signals, intersections, and congestion.
Analytical insight
When compared to the New Jersey state averages: Mercer sees 12% lower average daily traffic volume than the state average (7,849 vehicles per day against 8,886), suggesting less demand on each road - a critical factor for logistics and site planning. Across the whole network that adds up to 5,871,435 vehicle-miles traveled per day (≈2.1 billion per year), roughly 3.8% of New Jersey's statewide total. Journey times run 6% higher than the state level, at 35.4 minutes on average. Congestion runs 15% lower than the state level, at a ratio of 23.1% - smoother traffic flow - crucial for traffic control improvement and logistics planning. By volume, Mercer's 7,849 vehicles per day outpaces 45% of counties in New Jersey. 90% of counties in New Jersey have a shorter average travel time than Mercer's 35.4 minutes.
Highway vs. Non-Highway Traffic Analysis
Highway Traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
16,962
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
14.2%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
40.5 min
Congestion ratio
Congestion ratio
The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.
31.0%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
47.6 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$133,483
A significant volume of traffic in Mercer County, New Jersey utilizes the highway network. The average highway carries 16,962 vehicles per day, 136% more than the average non-highway road in the same area, which carries 7,181 vehicles per day. That average covers 171 highway road miles divided in 1,232 segments (average segment length 731 ft), together carrying 3,138,710 vehicle-miles traveled per day (≈1.1 billion per year). Trucks constitute 14.2% of highway traffic.
Analytical insight
At 14.2%, highway truck share is 39% higher than the state average, marking Mercer as a significant freight corridor - underscoring the importance of highway access for logistics operators. By truck concentration, highways here outrank 85% of counties in New Jersey. 60% of counties in New Jersey see fewer highway trucks per day than Mercer's roughly 2,415.
Non-highway traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
7,181
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
4.2%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
35.0 min
Congestion ratio
Congestion ratio
The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.
22.5%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
47.3 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$126,901
The non-highway road network in Mercer County, New Jersey supports a substantial volume of traffic. The average non-highway road carries 7,181 vehicles per day, 58% less than the average highway in the same area, which carries 16,962 vehicles per day. That average covers 452 non-highway road miles divided in 16,804 segments (average segment length 142 ft), together carrying 2,732,725 vehicle-miles traveled per day (≈997 million per year). Trucks constitute 4.2% of non-highway traffic.
Analytical insight
Non-highway roads carry a truck concentration that's 71% lower than the highway network. At 8% lower than the state level, the non-highway congestion ratio of 22.5% signals easier movement on local roads. Overall, average travel time here is longer than 90% of counties in New Jersey. 65% of counties in New Jersey see lower average driver income among trip origins than Mercer. 40% of counties in New Jersey have a younger driver population than Mercer.
Time-of-Day & Seasonal Patterns
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–9:00 AM and PM peak 12:00 PM–7:00 PM, with volumes reaching approximately 63% higher than the daily average.
Weekend traffic:
Weekend volumes run about 24% below weekday levels.
Seasonal Fluctuation
Busy season:
August–October is the high season, with volumes +5% versus the annual average.
Lowest month:
January is the quietest month, with volumes -8% versus the annual average.
Analytical insight
In Mercer County, New Jersey, the peak hour concentrates about 7% of the day's traffic, and seasonal swing is mild at +5% in high season.
Traffic Flow Profile Comparison
Metric
Mercer
New Jersey
Average
Difference
Traffic
7,849
8,886
-11.7%
Truck % (Total Traffic)
9.6%
7.9%
+20.4%
Truck % (Highway)
14.2%
10.2%
+39.5%
Avg. Travel Time
35.4 min
33.4 min
+6.0%
Frequently Asked Questions
The average daily traffic volume is calculated at 7,849 vehicles per day, providing a baseline for daily operations and site assessment.
Mercer's average travel time of 35.4 minutes is longer than 90% of counties in New Jersey.
Weekday peaks occur between 7:00 AM and 9:00 AM in the morning and between 12:00 PM and 7:00 PM in the evening - about 63% above the daily average.
The average travel time for drivers is 35.4 minutes, offering a standard metric for commute and delivery route planning.
Drivers on Mercer roads have a median age of 47 years, and the median household income of the neighborhoods trips originate from averages $129,224 - useful context for retail siting and customer profiling.
Approximately 36% of highway traffic and 7% of non-highway traffic consists of vehicles whose trip originates outside Mercer County, New Jersey. This indicates that a portion of highway traffic is regional pass-through, while local roads are more representative of resident and commuter activity.
Traffic volumes are typically 5% higher during August–October. Volumes drop to their lowest levels in January, averaging 7,198 vehicles per day - a 8% decrease from the annual average.
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)
