
Total Traffic Volume & Performance in Hillsborough, New Hampshire
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day7,083 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 6.0% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 32.5 min |
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Congestion ratio The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network. | 21.6% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 47.2 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $118,363 |
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The average monitored road in Hillsborough, New Hampshire carries 7,083 vehicles per day. Across its 888 miles of monitored roads, that adds up to 7,274,784 vehicle-miles traveled per day (≈2.7 billion per year). About 1 in 17 vehicles is a truck, fewer than the 1 in 14 across New Hampshire.
The busiest roads of any county in New Hampshire
At 7,083 vehicles per day, the average monitored road in Hillsborough carries 25% more traffic than the state average of 5,669, suggesting more demand on each road - a critical factor for logistics and site planning. Network-wide, Hillsborough accounts for about 22% of New Hampshire's statewide total of vehicle-miles. At 7,083 vehicles per day, Hillsborough posts the highest average traffic volume in New Hampshire.
At 32.5 minutes, the average travel time matches the state level closely. Its average travel time of 32.5 minutes is shorter than 78% of counties in New Hampshire.
The congestion ratio of 21.6% is 23% higher, pointing to more pronounced congestion than the state level - relevant for traffic control and delivery planning.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Hillsborough, New Hampshire
| Traffic | vehicles per day18,232 |
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| Trucks | 7.2% |
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| Average travel time | 35.8 min |
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| Congestion ratio | 40.6% |
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| Drivers’ average age | 47.6 yrs |
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| Drivers’ average income | $119,382 |
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Travel in Hillsborough, New Hampshire splits roughly evenly, with about half of it (48% of vehicle-miles) on highways. The average highway carries 18,232 vehicles per day, 189% more than the average non-highway road in the same area, which carries 6,304 vehicles per day.
With 17% of the road miles (154 miles in 1,608 segments), highways punch above their length, carrying 3,525,044 vehicle-miles traveled per day (≈1.3 billion per year).
That is more highway travel volume than 89% of counties in New Hampshire.
The lowest highway truck share of any county in New Hampshire
At 7.2%, highway truck share is 16% lower than the state average. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.
At 7.2%, Hillsborough's highway truck concentration is the lowest in New Hampshire. By raw truck volume, Hillsborough carries more highway trucks than 89% of counties in New Hampshire.

Non-highway Traffic in Hillsborough, New Hampshire
| Traffic | vehicles per day6,304 |
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| Trucks | 4.8% |
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| Average travel time | 32.3 min |
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| Congestion ratio | 20.2% |
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| Drivers’ average age | 46.7 yrs |
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| Drivers’ average income | $117,744 |
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Travel in Hillsborough, New Hampshire splits roughly evenly, with about half of it (52% of vehicle-miles) on local roads. The average non-highway road carries 6,304 vehicles per day.
Spread over 734 miles and 22,997 segments, 83% of the road network, local roads carry a lighter load per mile: 3,749,739 vehicle-miles traveled per day (≈1.4 billion per year). The truck share on non-highway roads is 4.8%.
Drivers from higher-income areas than 89% of counties in New Hampshire
The concentration of trucks on non-highway roads is 34% lower than on highways.
At 25% higher than the state level, the non-highway congestion ratio of 20.2% signals more friction on local roads.
Hillsborough's average driver income is higher than 89% of counties in New Hampshire. Hillsborough's median driver age is lower than 89% of counties in New Hampshire.