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Traffic heat map of Belknap County, New Hampshire: 315 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Styles Bridges Highway

Belknap County, New Hampshire Traffic Counts

Our Belknap County, New Hampshire traffic data covers 7,173 road segments over 315 road miles, with an average segment of just 232 ft. Its busiest road, Styles Bridges Highway, carries 24,174 vehicles a day, 3.8 times the average road. 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 Volume & Performance in Belknap County, New Hampshire

Traffic

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

vehicles per day6,403
Trucks

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

6.9%
Average travel time

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

33.9 min
Congestion ratio

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

20.3%
Drivers’ average age

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

52.8 yrs
Drivers’ average income

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

$94,272

The average monitored road in Belknap County, New Hampshire carries 6,403 vehicles per day. Across its 315 miles of monitored roads, that adds up to 1,912,521 vehicle-miles traveled per day (≈698 million per year). About 1 in 14 vehicles is a truck, in line with New Hampshire (7.0%).

Busier roads than 78% of counties in New Hampshire

Belknap's average daily traffic volume is 13% higher than the state average - 6,403 vehicles per day against 5,669 - a factor worth weighing in site selection and logistics planning. Network-wide, Belknap accounts for about 5.8% of New Hampshire's statewide total of vehicle-miles. Belknap carries more traffic than 78% of counties in New Hampshire.

At 33.9 minutes, the average travel time matches the state level closely. On travel time, Belknap runs shorter than 56% of counties in New Hampshire.

At 16% higher than the state level, the 20.3% congestion ratio signals more pronounced congestion - crucial for traffic control improvement and logistics planning.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Belknap County, New Hampshire

Trafficvehicles per day12,166
Trucks9.0%
Average travel time33.3 min
Congestion ratio33.8%
Drivers’ average age51.8 yrs
Drivers’ average income$93,783

Highways carry a significant share of travel in Belknap County, New Hampshire: 43% of all vehicle-miles. The average highway carries 12,166 vehicles per day, 122% more than the average non-highway road in the same area, which carries 5,484 vehicles per day.

With 23% of the road miles (74 miles in 987 segments), highways punch above their length, carrying 829,342 vehicle-miles traveled per day (≈303 million per year).

A typical mix of freight and passenger traffic

Highway truck concentration here (9.0%) closely tracks the state average for similar road classifications. The highway traffic mix is typical for New Hampshire: neither freight- nor commuter-dominated.

By truck concentration, highways here trail 56% of counties in New Hampshire. Belknap's highway truck count is higher than 56% of counties in New Hampshire, at roughly 1,094 trucks per day.

non-highway traffic icon

Non-highway Traffic in Belknap County, New Hampshire

Trafficvehicles per day5,484
Trucks5.3%
Average travel time34.0 min
Congestion ratio18.2%
Drivers’ average age53.4 yrs
Drivers’ average income$94,573

Local roads carry more than half of all travel in Belknap County, New Hampshire (57% of vehicle-miles). On the average non-highway road, that comes to 5,484 vehicles per day.

Spread over 242 miles and 6,186 segments, 77% of the road network, local roads carry a lighter load per mile: 1,083,180 vehicle-miles traveled per day (≈395 million per year). The truck share on non-highway roads is 5.3%.

Older drivers than 78% of counties in New Hampshire

Non-highway roads carry a truck concentration that's 41% lower than the highway network.

Non-highway congestion (18.2%) runs slightly higher than the state level (13% higher).

Trip origins here have higher average income than 56% of counties in New Hampshire. 78% of counties in New Hampshire have a younger driver population than Belknap.

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 83% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 11% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +26% versus the annual average.
Lowest month:
January is the quietest month, with volumes -22% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Belknap County, New Hampshire, the peak hour concentrates about 8% of the day's traffic, and there is a strong seasonal swing of +26% in high season.

Belknap County vs. New Hampshire Traffic Comparison

Belknap County stays close to the New Hampshire average; the largest gap is its average daily traffic per road, 13% above.

MetricBelknap CountyNew Hampshire averageDifference
Traffic6,4035,669+12.9%
Truck % (Total Traffic)6.9%7.0%-1.6%
Truck % (Highway)9.0%8.6%+4.1%
Avg. Travel Time33.9 min32.7 min+3.8%

How Belknap County compares

Belknap County against nearby counties

Belknap 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.

Belknap 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
Belknap County6,4036.9%1,912,52133.9 min20.3%
Merrimack County, New Hampshire5,2757.6%5,263,01133.3 min16.9%
Strafford County, New Hampshire6,7526.2%2,815,77235.6 min21.2%
Carroll County, New Hampshire4,2396.5%1,420,84834.1 min13.3%
Grafton County, New Hampshire3,6758.0%2,635,47430.0 min13.2%
New Hampshire average5,6697.0%N/A32.7 min17.5%

Belknap County ranked within New Hampshire

Average daily traffic volume places Belknap County #3 of 10 in New Hampshire - the top quarter of the state.

Belknap County ranked among 10 county-level areas in New Hampshire (1 = highest).
MeasureBelknap CountyNew Hampshire rank
Traffic volume (AADT)6,403#3 of 10
Highway vehicle-miles per day829,342#7 of 10
Truck share on highways9.0%#6 of 10
Highway trucks per day1,094#5 of 10
Average travel time33.9 min#6 of 10
Average driver income$94,272#5 of 10
Average driver age52.8 yrs#3 of 10

Busiest roads in Belknap County, New Hampshire

Traffic concentrates on a few corridors: the three busiest roads average 20,774 vehicles a day, against 6,403 on the average road in Belknap County.

Styles Bridges Highway is the busiest road, at 24,174 vehicles a day, 2,650 of them trucks (11.0%). It also carries the most trucks.

Trips using Styles Bridges Highway are long: a median of 51.5 minutes against 33.9 county-wide, the mark of a through route.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Styles Bridges HighwayMotorway · 24,174vehicles2,650trucks · 11.0%
Road class
Motorway
Congestion ratio
25.7%
Median trip time
51.5 min
Drivers’ median age
51.0 yrs
Drivers’ average income
$93,605

Styles Bridges Highway carries 3.8 times the county average on its busiest stretch, where the median trip lasts 51.5 minutes.

2Daniel Webster HighwayTrunk road · 19,976vehicles1,162trucks · 5.8%
Road class
Trunk road
Congestion ratio
45.5%
Median trip time
30.2 min
Drivers’ median age
52.0 yrs
Drivers’ average income
$91,277

Travel on Daniel Webster Highway's busiest stretch runs 46% over free-flow time, against 20% across the county, so expect slower peak hours.

3Laconia RoadTrunk road · 18,171vehicles1,230trucks · 6.8%
Road class
Trunk road
Congestion ratio
40.5%
Median trip time
31.2 min
Drivers’ median age
51.3 yrs
Drivers’ average income
$87,840

Laconia Road is one of the more congested roads here: trips take 41% longer than at free-flow speed, against 20% county-wide.

4Main StreetTrunk road · 17,740vehicles1,086trucks · 6.1%
Road class
Trunk road
Congestion ratio
38.4%
Median trip time
31.1 min
Drivers’ median age
51.1 yrs
Drivers’ average income
$81,893

At 2.8 times the county average, Main Street draws drivers from neighborhoods averaging $81,893 in household income.

5Whittier HighwayPrimary road · 14,956vehicles908trucks · 6.1%
Road class
Primary road
Congestion ratio
35.9%
Median trip time
37.5 min
Drivers’ median age
58.3 yrs
Drivers’ average income
$96,154

The busiest stretch of Whittier Highway carries 2.3 times the county average; trucks are 6.1% of it, below the county-wide 6.9%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Styles Bridges HighwayMotorway · #1 by traffic24,174vehicles2,650trucks · 11.0%
2Laconia RoadTrunk road · #3 by traffic18,171vehicles1,230trucks · 6.8%
3Daniel Webster HighwayTrunk road · #2 by traffic19,976vehicles1,162trucks · 5.8%
4Main StreetTrunk road · #4 by traffic17,740vehicles1,086trucks · 6.1%
5Whittier HighwayPrimary road · #5 by traffic14,956vehicles908trucks · 6.1%
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

BelknapDepartment 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 Belknap County

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

Need segment-level traffic data?

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