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Traffic heat map of New Haven County, Connecticut: 1,461 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Merritt Parkway and I 95

New Haven County, Connecticut Traffic Counts

Our New Haven County, Connecticut traffic data covers 50,548 road segments over 1,461 road miles, with an average segment of just 153 ft. Trips here are the longest of any county in Connecticut, a median 34.6 minutes. Whether you are evaluating a new retail location, planning routes or assessing infrastructure, these numbers replace guesswork.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
Updated:
September 29, 2026
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total traffic icon

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
Trucks

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

8.5%
Average travel time

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

34.6 min
Congestion ratio

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

18.4%
Drivers’ average age

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

47.8 yrs
Drivers’ average income

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

$103,115

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 icon

Highway Traffic in New Haven County, Connecticut

Trafficvehicles per day22,041
Trucks12.4%
Average travel time41.3 min
Congestion ratio42.7%
Drivers’ average age48.0 yrs
Drivers’ average income$107,180

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 icon

Non-highway Traffic in New Haven County, Connecticut

Trafficvehicles per day6,797
Trucks4.2%
Average travel time34.3 min
Congestion ratio17.2%
Drivers’ average age47.5 yrs
Drivers’ average income$100,381

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.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–9:00 AM and a long afternoon plateau from 12:00 PM to 7:00 PM, with volumes reaching approximately 64% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 16% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
May–July is the high season, with volumes +5% versus the annual average.
Lowest month:
January is the quietest month, with volumes -7% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In New Haven County, Connecticut, the peak hour concentrates about 7% of the day's traffic, and there is a noticeable seasonal swing of +5% in high season.

New Haven County vs. Connecticut Traffic Comparison

New Haven County stays close to the Connecticut average; the largest gap is its average daily traffic per road, 10% above.

MetricNew Haven CountyConnecticut averageDifference
Traffic7,4776,794+10.1%
Truck % (Total Traffic)8.5%8.4%+1.1%
Truck % (Highway)12.4%11.8%+5.3%
Avg. Travel Time34.6 min33.2 min+4.3%

How New Haven County compares

New Haven County against nearby counties

New Haven 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 third busiest roads of the five.

New Haven 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
New Haven County7,4778.5%14,364,51734.6 min18.4%
Middlesex County, Connecticut5,5429.1%3,838,69230.5 min14.9%
Fairfield County, Connecticut7,7778.1%13,991,09032.4 min19.3%
Hartford County, Connecticut7,7117.8%16,835,82934.0 min18.8%
Litchfield County, Connecticut4,4656.3%3,098,80330.8 min13.1%
Connecticut average6,7948.4%N/A33.2 min17.2%

New Haven County ranked within Connecticut

No other county-level area in Connecticut records a higher average travel time than New Haven County.

New Haven County ranked among 8 county-level areas in Connecticut (1 = highest).
MeasureNew Haven CountyConnecticut rank
Traffic volume (AADT)7,477#3 of 8
Highway vehicle-miles per day7,477,946#2 of 8
Truck share on highways12.4%#3 of 8
Highway trucks per day2,738#2 of 8
Average travel time34.6 min#1 of 8
Average driver income$103,115#5 of 8
Average driver age47.8 yrs#5 of 8

Busiest roads in New Haven County, Connecticut

The three busiest roads in New Haven County average 69,328 vehicles a day, 9.3 times the county average of 7,477 across all its monitored roads.

Merritt Parkway leads with 76,117 vehicles a day, 5,673 of them trucks (7.5%). I 95 carries the most trucks, 10,070 a day (14.4% of its traffic), although it ranks #2 for all traffic.

Freight stands out on I 91 and I 95: trucks are 15.8% and 14.4% of the traffic there, against 8.5% county-wide.

Trips using I 84 are long: a median of 47.0 minutes against 34.6 county-wide, the mark of a through route.

Drivers on Merritt Parkway come from neighborhoods with an average household income of $131,033, 27% above the county average of $103,115.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Merritt ParkwayMotorway · 76,117vehicles5,673trucks · 7.5%
Road class
Motorway
Congestion ratio
59.1%
Median trip time
41.1 min
Drivers’ median age
49.0 yrs
Drivers’ average income
$131,033

Merritt Parkway is one of the more congested roads here: trips take 59% longer than at free-flow speed, against 18% county-wide.

2I 95Motorway · 69,974vehicles10,070trucks · 14.4%
Road class
Motorway
Congestion ratio
62.0%
Median trip time
45.0 min
Drivers’ median age
48.5 yrs
Drivers’ average income
$104,308

Delays build on I 95: its congestion ratio of 62% over free-flow time is well above the county's 18%.

3I 91Motorway · 61,892vehicles9,793trucks · 15.8%
Road class
Motorway
Congestion ratio
45.7%
Median trip time
39.6 min
Drivers’ median age
46.7 yrs
Drivers’ average income
$99,726

A main artery: I 91's busiest stretch carries 8.3 times the county average; trucks are 15.8% of it, above the county-wide 8.5%.

4I 84Motorway · 57,035vehicles6,818trucks · 11.9%
Road class
Motorway
Congestion ratio
50.2%
Median trip time
47.0 min
Drivers’ median age
48.4 yrs
Drivers’ average income
$106,492

I 84 is a trunk route for the county, carrying 7.6 times the county average on its busiest stretch; trucks are 11.9% of it, above the county-wide 8.5%.

5I 691Motorway · 45,749vehicles4,237trucks · 9.3%
Road class
Motorway
Congestion ratio
39.3%
Median trip time
38.9 min
Drivers’ median age
49.1 yrs
Drivers’ average income
$106,497

I 691 carries 6.1 times the county average at its busiest, 4,237 of them trucks (9.3%, above the county-wide 8.5%).

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 95Motorway · #2 by traffic69,974vehicles10,070trucks · 14.4%
2I 91Motorway · #3 by traffic61,892vehicles9,793trucks · 15.8%
3I 84Motorway · #4 by traffic57,035vehicles6,818trucks · 11.9%
4Merritt ParkwayMotorway · #1 by traffic76,117vehicles5,673trucks · 7.5%
5Wilbur Cross ParkwayMotorway · 43,490vehicles4,811trucks · 11.1%
Road class
Motorway
Congestion ratio
47.1%
Median trip time
45.6 min
Drivers’ median age
48.2 yrs
Drivers’ average income
$118,621

Drivers on Wilbur Cross Parkway are on long journeys, a median 45.6 minutes against 34.6 county-wide: a through route more than a local street.

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

New HavenDepartment 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 New Haven County

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

Need segment-level traffic data?

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