
Total Traffic Volume & Performance in New Haven County, Connecticut
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day7,477 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 8.5% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 34.6 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. | 18.4% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 47.8 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $103,115 |
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The average monitored road in New Haven County, Connecticut carries 7,477 vehicles per day. Across its 1,461 miles of monitored roads, that adds up to 14,364,517 vehicle-miles traveled per day (≈5.2 billion per year). About 1 in 12 vehicles is a truck, in line with Connecticut (8.4%).
The longest trips of any county in Connecticut
At 7,477 vehicles per day, the average road in New Haven carries somewhat more traffic than the state average of 6,794 (10% more) - a factor worth weighing in site selection and logistics planning. Network-wide, New Haven accounts for about 23% of Connecticut's statewide total of vehicle-miles. New Haven carries more traffic than 71% of counties in Connecticut.
The average trip takes 34.6 minutes, on par with the state level. At 34.6 minutes, New Haven also has the highest average travel time in Connecticut.
The congestion ratio of 18.4% runs slightly higher than the state level (7% higher).
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in New Haven County, Connecticut
| Traffic | vehicles per day22,041 |
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| Trucks | 12.4% |
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| Average travel time | 41.3 min |
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| Congestion ratio | 42.7% |
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| Drivers’ average age | 48.0 yrs |
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| Drivers’ average income | $107,180 |
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Travel in New Haven County, Connecticut splits roughly evenly, with about half of it (52% of vehicle-miles) on highways. The average highway carries 22,041 vehicles per day, 224% more than the average non-highway road in the same area, which carries 6,797 vehicles per day.
With 21% of the road miles (301 miles in 2,256 segments), highways punch above their length, carrying 7,477,946 vehicle-miles traveled per day (≈2.7 billion per year).
By highway travel volume, New Haven outranks 86% of counties in Connecticut.
More highway trucks than 86% of counties in Connecticut
The concentration of trucks on highways (12.4%) is 5% higher than the state average for similar road classifications. The highway traffic mix is typical for Connecticut: neither freight- nor commuter-dominated.
By truck concentration, highways here outrank 71% of counties in Connecticut. New Haven's highway truck count is higher than 86% of counties in Connecticut, at roughly 2,738 trucks per day.

Non-highway Traffic in New Haven County, Connecticut
| Traffic | vehicles per day6,797 |
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| Trucks | 4.2% |
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| Average travel time | 34.3 min |
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| Congestion ratio | 17.2% |
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| Drivers’ average age | 47.5 yrs |
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| Drivers’ average income | $100,381 |
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Travel in New Haven County, Connecticut splits roughly evenly, with about half of it (48% of vehicle-miles) on local roads. A typical local road sees 6,797 vehicles per day.
Local roads make up 79% of the monitored road miles (1,160 miles in 48,292 segments) but carry less than their share of travel: 6,886,571 vehicle-miles traveled per day (≈2.5 billion per year). About 1 in 24 vehicles on non-highway roads is a truck (4.2%).
Local roads carry 66% fewer trucks by share than highways
The concentration of trucks on non-highway roads is 66% lower than on highways.
Non-highway congestion (17.2%) runs slightly higher than the state level (9% higher).
New Haven's average driver income is lower than 57% of counties in Connecticut. 57% of counties in Connecticut have an older driver population than New Haven.