
Total Traffic Volume & Performance in Fairfield County, Connecticut
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day7,777 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 8.1% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 32.4 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. | 19.3% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 47.6 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $138,054 |
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A typical monitored road in Fairfield County, Connecticut sees 7,777 vehicles per day, while its 1,346 miles of monitored roads together handle 13,991,090 vehicle-miles traveled per day (≈5.1 billion per year). About 1 in 12 vehicles is a truck, in line with Connecticut (8.4%).
The busiest roads of any county in Connecticut
Fairfield's average daily traffic volume is 14% higher than the state average - 7,777 vehicles per day against 6,794 - a critical factor for logistics and site planning. Network-wide, Fairfield accounts for about 22% of Connecticut's statewide total of vehicle-miles. In fact, Fairfield has the highest average traffic volume of any county in Connecticut, at 7,777 vehicles per day.
Journey times here (32.4 minutes on average) closely track the state level. On travel time, Fairfield runs shorter than 71% of counties in Connecticut.
Congestion is somewhat higher than the state level, at a ratio of 19.3% (12% higher) - crucial for traffic control improvement and logistics planning.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Fairfield County, Connecticut
| Traffic | vehicles per day24,967 |
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| Trucks | 11.9% |
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| Average travel time | 43.9 min |
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| Congestion ratio | 47.8% |
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| Drivers’ average age | 47.7 yrs |
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| Drivers’ average income | $135,772 |
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Highways carry about half of all travel in Fairfield County, Connecticut, 52% of vehicle-miles. The average highway carries 24,967 vehicles per day, 263% more than the average non-highway road in the same area, which carries 6,871 vehicles per day.
Highways make up 20% of the monitored road miles (270 miles, 2,525 segments), so they carry more than their share: 7,295,539 vehicle-miles traveled per day (≈2.7 billion per year).
That is more highway travel volume than 71% of counties in Connecticut.
The most highway trucks of any county in Connecticut
The concentration of trucks on highways (11.9%) is in line with the state average for similar road classifications. The highway traffic mix is typical for Connecticut: neither freight- nor commuter-dominated.
71% of counties in Connecticut see a higher highway truck share than Fairfield's 11.9%. Fairfield also moves the highest raw count of highway trucks in Connecticut, at roughly 3,207 per day.

Non-highway Traffic in Fairfield County, Connecticut
| Traffic | vehicles per day6,871 |
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| Trucks | 4.0% |
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| Average travel time | 31.8 min |
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| Congestion ratio | 17.8% |
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| Drivers’ average age | 47.5 yrs |
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| Drivers’ average income | $139,703 |
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Local roads carry about half of all travel in Fairfield County, Connecticut, 48% of vehicle-miles. On the average non-highway road, that comes to 6,871 vehicles per day.
Local roads make up 80% of the monitored road miles (1,076 miles in 47,896 segments) but carry less than their share of travel: 6,695,552 vehicle-miles traveled per day (≈2.4 billion per year). About 1 in 25 vehicles on non-highway roads is a truck (4.0%).
The highest driver income of any county in Connecticut
Compared to highways, non-highway routes see 67% fewer trucks by share.
Non-highway congestion (17.8%) runs slightly higher than the state level (13% higher).
Trips here originate from the highest average driver income in Connecticut, at $138,054. Fairfield's median driver age is lower than 71% of counties in Connecticut.