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Traffic heat map of Fairfield County, Connecticut: 1,346 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 95 and I 84

Fairfield County, Connecticut Traffic Counts

How busy are the roads of Fairfield County, Connecticut? We measure 1,346 road miles, divided into 50,421 segments, with multi-sourced, cross-verified mobile and sensor data. It has the busiest roads of any county in Connecticut, averaging 7,777 vehicles a day. The breakdown below covers volume, trucks, congestion and driver profiles for retailers, logistics planners and engineers.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
Updated:
September 29, 2026
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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
Trucks

The percentage of the total traffic volume composed of heavy vehicles.

8.1%
Average travel time

The average time of travel averaged among all vehicles traveling on the road network.

32.4 min
Congestion ratio

The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.

19.3%
Drivers’ average age

Average age of residents in the geographic areas where the vehicle trips originated.

47.6 yrs
Drivers’ average income

Average income of residents in the geographic areas where the vehicle trips originated.

$138,054

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 icon

Highway Traffic in Fairfield County, Connecticut

Trafficvehicles per day24,967
Trucks11.9%
Average travel time43.9 min
Congestion ratio47.8%
Drivers’ average age47.7 yrs
Drivers’ average income$135,772

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 icon

Non-highway Traffic in Fairfield County, Connecticut

Trafficvehicles per day6,871
Trucks4.0%
Average travel time31.8 min
Congestion ratio17.8%
Drivers’ average age47.5 yrs
Drivers’ average income$139,703

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.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
A long morning plateau from 7:00 AM to 12:00 PM and a long afternoon plateau from 12:00 PM to 7:00 PM, with volumes reaching approximately 66% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 15% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +10% versus the annual average.
Lowest month:
February is the quietest month, with volumes -14% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Fairfield County, Connecticut, the peak hour concentrates about 7% of the day's traffic, and there is a noticeable seasonal swing of +10% in high season.

Fairfield County vs. Connecticut Traffic Comparison

Fairfield County stays close to the Connecticut average; the largest gap is its average daily traffic per road, 14% above.

MetricFairfield CountyConnecticut averageDifference
Traffic7,7776,794+14.5%
Truck % (Total Traffic)8.1%8.4%-3.6%
Truck % (Highway)11.9%11.8%+0.5%
Avg. Travel Time32.4 min33.2 min-2.3%

How Fairfield County compares

Fairfield County against nearby counties

Fairfield County tracks the 4 areas around it closely - no measure in this table sets it far apart from the areas immediately next to it, though it has the second busiest roads of the five.

Fairfield County and the 4 nearest county-level areas by centroid distance, with the Connecticut average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Fairfield County7,7778.1%13,991,09032.4 min19.3%
New Haven County, Connecticut7,4778.5%14,364,51734.6 min18.4%
Putnam County, New York5,7308.1%2,645,83631.1 min13.3%
Westchester County, New York8,4716.6%17,643,11334.2 min20.1%
Litchfield County, Connecticut4,4656.3%3,098,80330.8 min13.1%
Connecticut average6,7948.4%N/A33.2 min17.2%

Fairfield County ranked within Connecticut

Average daily traffic volume, highway truck volume and average driver income: on all 3, Fairfield County sits first in Connecticut.

Fairfield County ranked among 8 county-level areas in Connecticut (1 = highest).
MeasureFairfield CountyConnecticut rank
Traffic volume (AADT)7,777#1 of 8
Highway vehicle-miles per day7,295,539#3 of 8
Truck share on highways11.9%#6 of 8
Highway trucks per day2,961#1 of 8
Average travel time32.4 min#6 of 8
Average driver income$138,054#1 of 8
Average driver age47.6 yrs#6 of 8

Busiest roads in Fairfield County, Connecticut

On their busiest stretches, the three busiest roads in Fairfield County carry 71,763 vehicles a day on average, 9.2 times the typical road in the county (7,777).

I 95 is the busiest road, at 87,358 vehicles a day, 13,718 of them trucks (15.7%). It tops the truck ranking too, with the most trucks.

Trucks make up 15.7% of traffic on I 95, against 8.1% across all roads in the county.

Trips using I 95 are long: a median of 46.8 minutes against 32.4 county-wide, the mark of a through route.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 95Motorway · 87,358vehicles13,718trucks · 15.7%
Road class
Motorway
Congestion ratio
66.7%
Median trip time
46.8 min
Drivers’ median age
46.9 yrs
Drivers’ average income
$130,154

Delays build on I 95: its congestion ratio of 67% over free-flow time is well above the county's 19%.

2I 84Motorway · 76,567vehicles6,528trucks · 8.5%
Road class
Motorway
Congestion ratio
58.3%
Median trip time
43.3 min
Drivers’ median age
49.5 yrs
Drivers’ average income
$118,151

Travel on I 84's busiest stretch runs 58% over free-flow time, against 19% across the county, so expect slower peak hours.

3CT 8 / CT 25Motorway · 51,366vehicles4,638trucks · 9.0%
Road class
Motorway
Congestion ratio
37.0%
Median trip time
34.8 min
Drivers’ median age
47.1 yrs
Drivers’ average income
$111,617

CT 8 / CT 25 carries 6.6 times the county average on its busiest stretch, where the median trip lasts 34.8 minutes.

4Merritt ParkwayMotorway · 45,409vehicles4,023trucks · 8.9%
Road class
Motorway
Congestion ratio
48.7%
Median trip time
44.3 min
Drivers’ median age
49.8 yrs
Drivers’ average income
$162,568

Merritt Parkway carries through traffic: the median trip using it lasts 44.3 minutes, against 32.4 for the county.

5CT 8Motorway · 42,963vehicles3,850trucks · 9.0%
Road class
Motorway
Congestion ratio
47.0%
Median trip time
34.2 min
Drivers’ median age
48.1 yrs
Drivers’ average income
$106,843

At 5.5 times the county average, CT 8 draws drivers from neighborhoods averaging $106,843 in household income.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 95Motorway · #1 by traffic87,358vehicles13,718trucks · 15.7%
2I 84Motorway · #2 by traffic76,567vehicles6,528trucks · 8.5%
3CT 8 / CT 25Motorway · #3 by traffic51,366vehicles4,638trucks · 9.0%
4Merritt ParkwayMotorway · #4 by traffic45,409vehicles4,023trucks · 8.9%
5CT 8Motorway · #5 by traffic42,963vehicles3,850trucks · 9.0%
How to read these road counts
  • The first number is AADT, annual average daily traffic: the vehicles passing a point on an average day, both directions combined and trucks included. On a divided highway both carriageways are added together.
  • Traffic changes along a road, with more near interchanges and towns and less in open country. Every figure for a road describes its busiest stretch in the county, so the two rankings show the same numbers for the same road.
  • The second number is the trucks on that stretch, a part of its AADT. The bar splits the AADT into cars and light vehicles (blue) and trucks (amber).
  • See segment-level AADT for any road on TrafficZoom.

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)

Road sensor networks and traffic counters

Historical traffic pattern databases

Public traffic count programs published by the

FairfieldDepartment of Transportation

Demographic Baseline for O-D Modeling

U.S. Census Bureau
All metrics represent estimates based on statistical modeling and are intended for strategic planning purposes.
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Data current as of:
Q3 2026

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Counties near Fairfield County

The same traffic breakdown for the areas closest to Fairfield County, Connecticut.

Need segment-level traffic data?

Identify traffic patterns street by street and analyze the exact corridors that matter to your project.