
Total Traffic Volume & Performance in Somerset County, New Jersey
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day7,854 |
|---|
Trucks The percentage of the total traffic volume composed of heavy vehicles. | 7.8% |
|---|
Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 33.0 min |
|---|
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 Average age of residents in the geographic areas where the vehicle trips originated. | 48.0 yrs |
|---|
Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $159,027 |
|---|
The average monitored road in Somerset County, New Jersey carries 7,854 vehicles per day. Across its 688 miles of monitored roads, that adds up to 7,289,293 vehicle-miles traveled per day (≈2.7 billion per year). About 1 in 13 vehicles is a truck, in line with New Jersey (7.9%).
Congestion 14% below the New Jersey average
At 7,854 vehicles per day, the average road in Somerset carries somewhat less traffic than the state average of 8,886 (12% less) - a factor worth weighing in site selection and logistics planning. In total volume terms, its road network carries about 4.7% of New Jersey's statewide total of vehicle-miles. By volume, Somerset's 7,854 vehicles per day outpaces 50% of counties in New Jersey.
Journey times here (33.0 minutes on average) closely track the state level. On travel time, Somerset runs shorter than 55% of counties in New Jersey.
Congestion is somewhat lower than the state level, at a ratio of 23.1% (14% lower) - relevant for traffic control and delivery planning.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Somerset County, New Jersey
| Traffic | vehicles per day23,185 |
|---|
| Trucks | 10.5% |
|---|
| Average travel time | 38.2 min |
|---|
| Congestion ratio | 50.3% |
|---|
| Drivers’ average age | 48.2 yrs |
|---|
| Drivers’ average income | $151,296 |
|---|
Highways carry more than half of all travel in Somerset County, New Jersey (57% of vehicle-miles). The average highway carries 23,185 vehicles per day, 253% more than the average non-highway road in the same area, which carries 6,577 vehicles per day.
With 23% of the road miles (158 miles in 1,584 segments), highways punch above their length, carrying 4,186,892 vehicle-miles traveled per day (≈1.5 billion per year).
By highway travel volume, Somerset outranks 55% of counties in New Jersey.
More highway trucks than 65% of counties in New Jersey
Highway truck concentration here (10.5%) closely tracks the state average for similar road classifications. The highway traffic mix is typical for New Jersey: neither freight- nor commuter-dominated.
Somerset's highway truck share (10.5%) is higher than 55% of counties in New Jersey. 65% of counties in New Jersey see fewer highway trucks per day than Somerset's roughly 2,432.

Non-highway Traffic in Somerset County, New Jersey
| Traffic | vehicles per day6,577 |
|---|
| Trucks | 4.2% |
|---|
| Average travel time | 32.6 min |
|---|
| Congestion ratio | 20.9% |
|---|
| Drivers’ average age | 47.7 yrs |
|---|
| Drivers’ average income | $165,787 |
|---|
Local roads carry a significant share of travel in Somerset County, New Jersey: 43% of all vehicle-miles. A typical local road sees 6,577 vehicles per day.
Spread over 530 miles and 19,024 segments, 77% of the road network, local roads carry a lighter load per mile: 3,102,401 vehicle-miles traveled per day (≈1.1 billion per year). Trucks make up 4.2% of non-highway traffic, about 1 in 24 vehicles.
The highest driver income of any county in New Jersey
The concentration of trucks on non-highway roads is 60% lower than on highways.
Non-highway congestion (20.9%) runs slightly lower than the state level (14% lower).
Trips here originate from the highest average driver income in New Jersey, at $159,027. Somerset's median driver age is lower than 55% of counties in New Jersey.