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Traffic heat map of Coos County, New Hampshire: 341 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Main Street and Glen Avenue

Coos County, New Hampshire Traffic Counts

Its roads are the quietest of any county in New Hampshire, at 3,146 vehicles a day on average. This page breaks down traffic in Coos County, New Hampshire across 341 miles of monitored roads split into 5,469 segments, using multi-sourced mobile and sensor data. It goes beyond raw counts to truck flow, congestion and who is driving, so site selection and route planning rest on evidence.
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 Coos County, New Hampshire

Traffic

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

vehicles per day3,146
Trucks

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

8.2%
Average travel time

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

35.3 min
Congestion ratio

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

9.8%
Drivers’ average age

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

54.8 yrs
Drivers’ average income

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

$61,993

A typical monitored road in Coos County, New Hampshire sees 3,146 vehicles per day, while its 341 miles of monitored roads together handle 842,467 vehicle-miles traveled per day (≈308 million per year). At 8.2%, the truck share runs above the 7.0% across New Hampshire: about 1 in 12 vehicles.

The quietest roads of any county in New Hampshire

Coos sees 45% lower average daily traffic volume than the state average (3,146 vehicles per day against 5,669), suggesting less demand on each road - less drive-by exposure for retail, but easier access for deliveries. Network-wide, Coos accounts for about 2.6% of New Hampshire's statewide total of vehicle-miles. At 3,146 vehicles per day, Coos posts the lowest average traffic volume in New Hampshire.

Journey times run 8% higher than the state level, at 35.3 minutes on average. Its average travel time of 35.3 minutes is longer than 89% of counties in New Hampshire.

Congestion runs 44% lower than the state level, at a ratio of 9.8%, which means smoother traffic flow - fewer delays make delivery windows more reliable.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Coos County, New Hampshire

Trafficvehicles per day4,790
Trucks9.2%
Average travel time36.0 min
Congestion ratio12.0%
Drivers’ average age54.5 yrs
Drivers’ average income$67,458

Highways carry a smaller share of travel in Coos County, New Hampshire, 23% of vehicle-miles; most driving happens on local roads. The average highway carries 4,790 vehicles per day, 76% more than the average non-highway road in the same area, which carries 2,722 vehicles per day.

With 15% of the road miles (50 miles in 1,120 segments), highways punch above their length, carrying 194,056 vehicle-miles traveled per day (≈70.8 million per year).

The fewest highway trucks of any county in New Hampshire

At 9.2%, highway truck share is 6% higher than the state average. The highway traffic mix is typical for New Hampshire: neither freight- nor commuter-dominated.

67% of counties in New Hampshire see a lower highway truck share than Coos's 9.2%. By raw volume, Coos carries the lowest number of highway trucks in New Hampshire - roughly 359 trucks per day.

non-highway traffic icon

Non-highway Traffic in Coos County, New Hampshire

Trafficvehicles per day2,722
Trucks7.9%
Average travel time35.1 min
Congestion ratio9.3%
Drivers’ average age55.1 yrs
Drivers’ average income$60,885

Most travel in Coos County, New Hampshire happens on local roads, 77% of all vehicle-miles. On the average non-highway road, that comes to 2,722 vehicles per day.

Their share of road miles is similar, 85% (291 miles in 4,349 segments), carrying 648,411 vehicle-miles traveled per day (≈237 million per year). The truck share on non-highway roads is 7.9%.

The lowest driver income of any county in New Hampshire

Non-highway roads carry a truck concentration that's 14% lower than the highway network.

Non-highway congestion (9.3%) runs 42% lower than the state average, pointing to smoother local traffic flow.

Coos also has the lowest average driver income in New Hampshire among trip origins - $61,993. 89% of counties in New Hampshire have a younger driver population than Coos.

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 81% higher than the daily average.
Weekend traffic:
Weekend traffic is about as busy as on weekdays (-2%): leisure and through trips largely replace the commute.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
July–September is the high season, with volumes +18% versus the annual average.
Lowest month:
April is the quietest month, with volumes -19% versus the annual average.

Data Finding: Hourly & Seasonal Patterns

In Coos County, New Hampshire, the peak hour concentrates about 8% of the day's traffic, and there is a strong seasonal swing of +18% in high season.

Coos County vs. New Hampshire Traffic Comparison

The average daily traffic per road sets Coos County apart: 45% below the New Hampshire average. Its truck share, by contrast, is 17% above.

MetricCoos CountyNew Hampshire averageDifference
Traffic3,1465,669-44.5%
Truck % (Total Traffic)8.2%7.0%+16.7%
Truck % (Highway)9.2%8.6%+6.5%
Avg. Travel Time35.3 min32.7 min+7.9%

How Coos County compares

Coos County against nearby counties

Coos 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.

Coos County and the 4 nearest county-level areas by centroid distance, with the New Hampshire average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Coos County3,1468.2%842,46735.3 min9.8%
Essex County, Vermont1,4258.6%159,16930.9 min5.7%
Oxford County, Maine3,5247.9%1,330,89435.5 min11.8%
Caledonia County, Vermont3,3539.3%787,90528.6 min11.4%
Orleans County, Vermont1,9878.7%491,14827.9 min8.0%
New Hampshire average5,6697.0%N/A32.7 min17.5%

Coos County ranked within New Hampshire

No county-level area in New Hampshire records a lower average daily traffic volume, highway travel volume and highway truck volume than Coos County.

Coos County ranked among 10 county-level areas in New Hampshire (1 = highest).
MeasureCoos CountyNew Hampshire rank
Traffic volume (AADT)3,146#10 of 10
Highway vehicle-miles per day194,056#10 of 10
Truck share on highways9.2%#4 of 10
Highway trucks per day441#10 of 10
Average travel time35.3 min#2 of 10
Average driver income$61,993#10 of 10
Average driver age54.8 yrs#2 of 10

The two ends of this table sit far apart: #2 of 10 on average travel time, against #10 of 10 on average daily traffic volume.

Busiest roads in Coos County, New Hampshire

The three busiest roads in Coos County average 9,030 vehicles a day, 2.9 times the county average of 3,146 across all its monitored roads.

Main Street leads with 10,337 vehicles a day, 618 of them trucks (6.0%). Glen Avenue carries the most trucks, 760 a day (8.1% of its traffic), although it ranks #2 for all traffic.

Trips using Mason Street are long: a median of 60.9 minutes against 35.3 county-wide, the mark of a through route.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Main StreetTrunk road · 10,337vehicles618trucks · 6.0%
Road class
Trunk road
Median trip time
31.6 min
Drivers’ median age
55.3 yrs
Drivers’ average income
$75,650

Main Street peaks at 10,337 vehicles a day, 3.3 times the county average; trucks are 6.0% of it, below the county-wide 8.2%.

2Glen AvenuePrimary road · 9,353vehicles760trucks · 8.1%
Road class
Primary road
Congestion ratio
31.3%
Median trip time
35.0 min
Drivers’ median age
54.4 yrs
Drivers’ average income
$54,072

Glen Avenue is one of the more congested roads here: trips take 31% longer than at free-flow speed, against 10% county-wide.

3Lancaster RoadPrimary road · 7,400vehicles509trucks · 6.9%
Road class
Primary road
Median trip time
30.1 min
Drivers’ median age
56.1 yrs
Drivers’ average income
$72,832

Lancaster Road carries 2.4 times the county average at its busiest, 509 of them trucks (6.9%, below the county-wide 8.2%).

4Mason StreetTertiary road · 6,076vehicles284trucks · 4.7%
Road class
Tertiary road
Congestion ratio
14.9%
Median trip time
60.9 min
Drivers’ median age
50.3 yrs
Drivers’ average income
$50,148

Mason Street carries 93% more than the county average on its busiest stretch, where the median trip lasts 60.9 minutes.

5Prospect StreetPrimary road · 5,737vehicles453trucks · 7.9%
Road class
Primary road
Congestion ratio
13.5%
Median trip time
31.2 min
Drivers’ median age
56.2 yrs
Drivers’ average income
$76,047

At 82% more than the county average, Prospect Street draws drivers from neighborhoods averaging $76,047 in household income.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Glen AvenuePrimary road · #2 by traffic9,353vehicles760trucks · 8.1%
2Main StreetTrunk road · #1 by traffic10,337vehicles618trucks · 6.0%
3Glen RoadTrunk road · 4,894vehicles579trucks · 11.8%
Road class
Trunk road
Congestion ratio
15.8%
Median trip time
43.9 min
Drivers’ median age
55.1 yrs
Drivers’ average income
$60,949

Delays build on Glen Road: its congestion ratio of 16% over free-flow time is well above the county's 10%.

4Gorham Hill RoadTrunk road · 5,491vehicles517trucks · 9.4%
Road class
Trunk road
Congestion ratio
12.7%
Median trip time
40.0 min
Drivers’ median age
53.8 yrs
Drivers’ average income
$66,708

Gorham Hill Road is busy by local standards, at 75% more than the county average on its busiest stretch; trucks are 9.4% of it, above the county-wide 8.2%.

5Lancaster RoadPrimary road · #3 by traffic7,400vehicles509trucks · 6.9%
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

CoosDepartment 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 Coos County

The same traffic breakdown for the areas closest to Coos County, New Hampshire.

Need segment-level traffic data?

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