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Traffic heat map of Windham County, Connecticut: 535 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 84 and I 395

Windham County, Connecticut Traffic Counts

Traffic analytics for Windham County, Connecticut, calculated from real-world mobile and sensor networks on 12,547 road segments (535 road miles, about 225 ft each). Its roads are the quietest of any county in Connecticut, at 3,907 vehicles a day on average. Use the figures below to move from assumptions to certainty on retail locations, logistics and road planning.
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 Windham County, Connecticut

Traffic

The average number of vehicles that travel each day over any road in the road network.

vehicles per day3,907
Trucks

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

8.6%
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.

11.4%
Drivers’ average age

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

47.9 yrs
Drivers’ average income

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

$86,322

The average monitored road in Windham County, Connecticut carries 3,907 vehicles per day. Across its 535 miles of monitored roads, that adds up to 2,111,303 vehicle-miles traveled per day (≈771 million per year). About 1 in 12 vehicles is a truck, in line with Connecticut (8.4%).

The quietest roads of any county in Connecticut

Windham's average daily traffic volume is 42% lower than the state average - 3,907 vehicles per day against 6,794 - suggesting less traffic load per road - less drive-by exposure for retail, but easier access for deliveries. In total volume terms, its road network carries about 3.3% of Connecticut's statewide total of vehicle-miles. At 3,907 vehicles per day, Windham posts the lowest average traffic volume in Connecticut.

The average trip takes 32.4 minutes, on par with the state level. On travel time, Windham runs shorter than 57% of counties in Connecticut.

At 34% lower than the state level, the 11.4% congestion ratio signals smoother traffic flow - travel times are easy to plan around for scheduled deliveries.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Windham County, Connecticut

Trafficvehicles per day9,877
Trucks12.1%
Average travel time36.0 min
Congestion ratio25.0%
Drivers’ average age46.6 yrs
Drivers’ average income$83,851

Highways carry a significant share of travel in Windham County, Connecticut: 42% of all vehicle-miles. The average highway carries 9,877 vehicles per day, 194% more than the average non-highway road in the same area, which carries 3,363 vehicles per day.

With 20% of the road miles (108 miles in 1,049 segments), highways punch above their length, carrying 888,977 vehicle-miles traveled per day (≈324 million per year).

Fewer highway trucks than 86% of counties in Connecticut

At 12.1%, the highway truck share matches the state average for similar road classifications. The highway traffic mix is typical for Connecticut: neither freight- nor commuter-dominated.

Windham's highway truck share (12.1%) is higher than 57% of counties in Connecticut. By raw truck volume, Windham carries fewer highway trucks than 86% of counties in Connecticut.

non-highway traffic icon

Non-highway Traffic in Windham County, Connecticut

Trafficvehicles per day3,363
Trucks6.0%
Average travel time32.1 min
Congestion ratio10.2%
Drivers’ average age48.7 yrs
Drivers’ average income$87,837

A little more than half of the driving in Windham County, Connecticut happens on local roads: 58% of all vehicle-miles. A typical local road sees 3,363 vehicles per day.

Spread over 427 miles and 11,498 segments, 80% of the road network, local roads carry a lighter load per mile: 1,222,326 vehicle-miles traveled per day (≈446 million per year). Trucks make up 6.0% of non-highway traffic, about 1 in 17 vehicles.

The lowest driver income of any county in Connecticut

The concentration of trucks on non-highway roads is 50% lower than on highways.

The non-highway congestion ratio of 10.2% is 35% lower than the state level, suggesting more efficient local mobility than the state average.

At $86,322, the average driver income for trips originating here is the lowest in Connecticut. 57% of counties in Connecticut have a younger driver population than Windham.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 10:00 AM–12:00 PM and a long afternoon plateau from 12:00 PM to 6:00 PM, with volumes reaching approximately 70% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 18% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
Traffic is nearly flat through the year: even August–October, the busiest stretch, runs only +0% versus the annual average.
Lowest month:
March is the quietest month, with volumes -3% versus the annual average.

Data Finding: Hourly & Seasonal Patterns

In Windham County, Connecticut, the peak hour concentrates about 7% of the day's traffic, and traffic stays steady through the year (+0% in high season).

Windham County vs. Connecticut Traffic Comparison

Of the four measures, average daily traffic per road differs most: Windham County runs 42% below the Connecticut average. The other measures stay close to the average.

MetricWindham CountyConnecticut averageDifference
Traffic3,9076,794-42.5%
Truck % (Total Traffic)8.6%8.4%+2.6%
Truck % (Highway)12.1%11.8%+2.9%
Avg. Travel Time32.4 min33.2 min-2.3%

How Windham County compares

Windham County moves the least traffic of its nearby counties

Against the 4 nearest areas, Windham County is 41.0% less congested and carries 47.6% less traffic on a typical road; it has the quietest roads of the five. Less traffic and more room for it - the roads here run both quieter and freer than the areas around them.

Windham 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
Windham County3,9078.6%2,111,30332.4 min11.4%
Tolland County, Connecticut5,37810.8%3,071,32132.5 min14.1%
Providence County, Rhode Island9,8286.3%10,827,04036.9 min27.5%
New London County, Connecticut5,7829.8%5,951,51832.6 min14.5%
Kent County, Rhode Island8,8187.2%3,797,17633.2 min21.4%
Connecticut average6,7948.4%N/A33.2 min17.2%

Windham County ranked within Connecticut

No county-level area in Connecticut records a lower average daily traffic volume, highway travel volume and average driver income than Windham County.

Windham County ranked among 8 county-level areas in Connecticut (1 = highest).
MeasureWindham CountyConnecticut rank
Traffic volume (AADT)3,907#8 of 8
Highway vehicle-miles per day888,977#8 of 8
Truck share on highways12.1%#4 of 8
Highway trucks per day1,199#7 of 8
Average travel time32.4 min#5 of 8
Average driver income$86,322#8 of 8
Average driver age47.9 yrs#4 of 8

Busiest roads in Windham County, Connecticut

Traffic concentrates on a few corridors: the three busiest roads average 21,159 vehicles a day, against 3,907 on the average road in Windham County.

I 84 leads with 32,057 vehicles a day, 6,810 of them trucks (21.2%). No other road comes close: I 395, in second place, carries 16,777. It tops the truck ranking too, with the most trucks.

Trips using I 84 are long: a median of 71.5 minutes against 32.4 county-wide, the mark of a through route.

Freight stands out on I 84: trucks are 21.2% of the traffic there, against 8.6% county-wide.

I 84 draws drivers from wealthier areas: their neighborhoods average $119,246 in household income, 38% above the county's $86,322, while those on Pleasant Street average $55,227, 36% below it.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 84Motorway · 32,057vehicles6,810trucks · 21.2%
Road class
Motorway
Congestion ratio
24.3%
Median trip time
71.5 min
Drivers’ median age
46.4 yrs
Drivers’ average income
$119,246

At 8.2 times the county average, I 84 draws drivers from neighborhoods averaging $119,246 in household income.

2I 395Motorway · 16,777vehicles2,118trucks · 12.6%
Road class
Motorway
Congestion ratio
17.5%
Median trip time
38.2 min
Drivers’ median age
49.7 yrs
Drivers’ average income
$85,134

On its busiest stretch, I 395 carries 4.3 times the county average; trucks are 12.6% of it, above the county-wide 8.6%.

3Boston Post RoadTrunk road · 14,643vehicles1,114trucks · 7.6%
Road class
Trunk road
Congestion ratio
22.6%
Median trip time
31.2 min
Drivers’ median age
43.9 yrs
Drivers’ average income
$79,115

Boston Post Road peaks at 14,643 vehicles a day, 3.7 times the county average; trucks are 7.6% of it, below the county-wide 8.6%.

4Main StreetTrunk road · 14,566vehicles943trucks · 6.5%
Road class
Trunk road
Congestion ratio
46.9%
Median trip time
35.6 min
Drivers’ median age
42.7 yrs
Drivers’ average income
$56,791

Main Street is one of the more congested roads here: trips take 47% longer than at free-flow speed, against 11% county-wide.

5Pleasant StreetTrunk road · 13,314vehicles851trucks · 6.4%
Road class
Trunk road
Congestion ratio
40.7%
Median trip time
46.1 min
Drivers’ median age
40.0 yrs
Drivers’ average income
$55,227

Delays build on Pleasant Street: its congestion ratio of 41% over free-flow time is well above the county's 11%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 84Motorway · #1 by traffic32,057vehicles6,810trucks · 21.2%
2I 395Motorway · #2 by traffic16,777vehicles2,118trucks · 12.6%
3US 6Motorway · 11,856vehicles1,316trucks · 11.1%
Road class
Motorway
Congestion ratio
18.1%
Median trip time
34.6 min
Drivers’ median age
40.4 yrs
Drivers’ average income
$83,788

US 6 carries 3.0 times the county average at its busiest, 1,316 of them trucks (11.1%, above the county-wide 8.6%).

4Boston Post RoadTrunk road · #3 by traffic14,643vehicles1,114trucks · 7.6%
5Willimantic RoadTrunk road · 11,776vehicles1,072trucks · 9.1%
Road class
Trunk road
Congestion ratio
28.4%
Median trip time
33.4 min
Drivers’ median age
47.2 yrs
Drivers’ average income
$88,300

Willimantic Road carries 3.0 times the county average on its busiest stretch, where the median trip lasts 33.4 minutes.

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

WindhamDepartment 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 Windham County

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

Need segment-level traffic data?

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