Need segment-level traffic data?

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

Get insights →
Traffic heat map of Middlesex County, Connecticut: 508 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 91 and CT 9

Middlesex County, Connecticut Traffic Counts

Traffic analytics for Middlesex County, Connecticut, calculated from real-world mobile and sensor networks on 14,613 road segments (508 road miles, about 184 ft each). Trips here are the shortest of any county in Connecticut, a median 30.5 minutes. 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
Find my place
total traffic icon

Total Traffic Volume & Performance in Middlesex County, Connecticut

Traffic

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

vehicles per day5,542
Trucks

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

9.1%
Average travel time

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

30.5 min
Congestion ratio

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

14.9%
Drivers’ average age

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

49.9 yrs
Drivers’ average income

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

$111,135

Our data shows 5,542 vehicles per day on the average road in Middlesex County, Connecticut, and 3,838,692 vehicle-miles traveled per day (≈1.4 billion per year) across its 508 miles of monitored roads. Trucks are 9.1% of traffic, close to the 8.4% across Connecticut.

The shortest trips of any county in Connecticut

Middlesex sees 18% lower average daily traffic volume than the state average (5,542 vehicles per day against 6,794), suggesting less demand on each road - a factor worth weighing in site selection and logistics planning. In total volume terms, its road network carries about 6.1% of Connecticut's statewide total of vehicle-miles. 57% of counties in Connecticut see more traffic than Middlesex's 5,542 vehicles per day.

At 30.5 minutes, the average travel time is 8% lower than the state level. It also posts the lowest average travel time in Connecticut, at 30.5 minutes.

The congestion ratio of 14.9% runs slightly lower than the state level (13% lower) - crucial for traffic control improvement and logistics planning.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Middlesex County, Connecticut

Trafficvehicles per day17,176
Trucks11.9%
Average travel time41.7 min
Congestion ratio36.8%
Drivers’ average age49.2 yrs
Drivers’ average income$109,122

Highways carry more than half of all travel in Middlesex County, Connecticut (61% of vehicle-miles). The average highway carries 17,176 vehicles per day, 278% more than the average non-highway road in the same area, which carries 4,540 vehicles per day.

With 24% of the road miles (121 miles in 1,159 segments), highways punch above their length, carrying 2,331,609 vehicle-miles traveled per day (≈851 million per year).

A typical mix of freight and passenger traffic

Highway truck concentration here (11.9%) closely tracks the state average for similar road classifications. The highway traffic mix is typical for Connecticut: neither freight- nor commuter-dominated.

Middlesex's highway truck share (11.9%) is lower than 57% of counties in Connecticut. Middlesex's highway truck count is lower than 57% of counties in Connecticut, at roughly 2,053 trucks per day.

non-highway traffic icon

Non-highway Traffic in Middlesex County, Connecticut

Trafficvehicles per day4,540
Trucks4.6%
Average travel time29.6 min
Congestion ratio13.0%
Drivers’ average age51.0 yrs
Drivers’ average income$113,180

A significant share of driving in Middlesex County, Connecticut, 39% of vehicle-miles, happens on local roads. On the average non-highway road, that comes to 4,540 vehicles per day.

Local roads make up 76% of the monitored road miles (387 miles in 13,454 segments) but carry less than their share of travel: 1,507,083 vehicle-miles traveled per day (≈550 million per year). The truck share on non-highway roads is 4.6%.

Older drivers than 86% of counties in Connecticut

Non-highway roads carry a truck concentration that's 61% lower than the highway network.

At 17% lower than the state level, the non-highway congestion ratio of 13.0% signals easier movement on local roads.

Trip origins here have higher average income than 71% of counties in Connecticut. 86% of counties in Connecticut have a younger driver population than Middlesex.

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 76% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 19% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +7% versus the annual average.
Lowest month:
January is the quietest month, with volumes -11% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

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

Middlesex County vs. Connecticut Traffic Comparison

Middlesex County's biggest difference from the Connecticut average is its average daily traffic per road, 18% below it.

MetricMiddlesex CountyConnecticut averageDifference
Traffic5,5426,794-18.4%
Truck % (Total Traffic)9.1%8.4%+8.4%
Truck % (Highway)11.9%11.8%+1.3%
Avg. Travel Time30.5 min33.2 min-8.0%

How Middlesex County compares

Middlesex County against nearby counties

Against the 4 nearest areas, Middlesex County moves 38.2% of the total daily travel; it has the fourth busiest roads of the five.

Middlesex 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
Middlesex County5,5429.1%3,838,69230.5 min14.9%
New Haven County, Connecticut7,4778.5%14,364,51734.6 min18.4%
Hartford County, Connecticut7,7117.8%16,835,82934.0 min18.8%
New London County, Connecticut5,7829.8%5,951,51832.6 min14.5%
Tolland County, Connecticut5,37810.8%3,071,32132.5 min14.1%
Connecticut average6,7948.4%N/A33.2 min17.2%

Middlesex County ranked within Connecticut

No county-level area in Connecticut records a lower average travel time than Middlesex County.

Middlesex County ranked among 8 county-level areas in Connecticut (1 = highest).
MeasureMiddlesex CountyConnecticut rank
Traffic volume (AADT)5,542#5 of 8
Highway vehicle-miles per day2,331,609#5 of 8
Truck share on highways11.9%#5 of 8
Highway trucks per day2,053#5 of 8
Average travel time30.5 min#8 of 8
Average driver income$111,135#3 of 8
Average driver age49.9 yrs#2 of 8

Middlesex County ranks #2 of 8 on average driver age but #8 of 8 on average travel time - the two describe the same roads and are worth reading together rather than either on its own.

Busiest roads in Middlesex County, Connecticut

On their busiest stretches, the three busiest roads in Middlesex County carry 56,922 vehicles a day on average, 10.3 times the typical road in the county (5,542).

I 91 leads with 85,613 vehicles a day, 13,816 of them trucks (16.1%). No other road comes close: CT 9, in second place, carries 43,248. It also carries the most trucks.

I 91 carries longer journeys than most roads here, with a median trip of 49.5 minutes against 30.5 county-wide.

Freight stands out on I 91 and I 95: trucks are 16.1% and 14.9% of the traffic there, against 9.1% county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 91Motorway · 85,613vehicles13,816trucks · 16.1%
Road class
Motorway
Congestion ratio
65.3%
Median trip time
49.5 min
Drivers’ median age
47.8 yrs
Drivers’ average income
$107,990

I 91 is one of the more congested roads here: trips take 65% longer than at free-flow speed, against 15% county-wide.

2CT 9Motorway · 43,248vehicles3,507trucks · 8.1%
Road class
Motorway
Congestion ratio
45.0%
Median trip time
35.5 min
Drivers’ median age
48.9 yrs
Drivers’ average income
$104,399

At 7.8 times the county average, CT 9 draws drivers from neighborhoods averaging $104,399 in household income.

3I 95Motorway · 41,906vehicles6,227trucks · 14.9%
Road class
Motorway
Congestion ratio
33.7%
Median trip time
49.2 min
Drivers’ median age
52.8 yrs
Drivers’ average income
$118,716

I 95 carries through traffic: the median trip using it lasts 49.2 minutes, against 30.5 for the county.

4CT 9 / CT 17Motorway · 39,478vehicles3,016trucks · 7.6%
Road class
Motorway
Congestion ratio
47.5%
Median trip time
37.5 min
Drivers’ median age
49.6 yrs
Drivers’ average income
$103,309

Delays build on CT 9 / CT 17: its congestion ratio of 47% over free-flow time is well above the county's 15%.

5Washington StreetTrunk road · 23,826vehicles1,146trucks · 4.8%
Road class
Trunk road
Congestion ratio
42.3%
Median trip time
35.0 min
Drivers’ median age
47.6 yrs
Drivers’ average income
$87,229

Washington Street carries 4.3 times the county average on its busiest stretch, where the median trip lasts 35.0 minutes.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 91Motorway · #1 by traffic85,613vehicles13,816trucks · 16.1%
2I 95Motorway · #3 by traffic41,906vehicles6,227trucks · 14.9%
3CT 9Motorway · #2 by traffic43,248vehicles3,507trucks · 8.1%
4CT 9 / CT 17Motorway · #4 by traffic39,478vehicles3,016trucks · 7.6%
5Chester Bowles HighwayMotorway · 22,946vehicles2,420trucks · 10.6%
Road class
Motorway
Congestion ratio
25.8%
Median trip time
41.4 min
Drivers’ median age
54.5 yrs
Drivers’ average income
$110,826

Drivers on Chester Bowles Highway are on long journeys, a median 41.4 minutes against 30.5 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

MiddlesexDepartment 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.
link arrow icon
Data current as of:
Q3 2026

Explore further

TrafficZoom platform

— street-level analytics and custom corridor reports.

Map AI

— demographics, housing and mobility data.

Counties near Middlesex County

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

Need segment-level traffic data?

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