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 Merrimack County, New Hampshire: 748 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Everett Turnpike and I 93

Merrimack County, New Hampshire Traffic Counts

TrafficZoom tracks traffic on 748 road miles in Merrimack County, New Hampshire, divided into 15,739 segments averaging 251 ft. Its busiest road, Everett Turnpike, carries 58,767 vehicles a day, 11.1 times the average road. Built from cross-verified mobile and road-sensor data, these counts help you size up a retail site, plan logistics routes or assess infrastructure needs.
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 Merrimack County, New Hampshire

Traffic

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

vehicles per day5,275
Trucks

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

7.6%
Average travel time

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

33.3 min
Congestion ratio

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

16.9%
Drivers’ average age

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

48.3 yrs
Drivers’ average income

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

$102,246

The average monitored road in Merrimack County, New Hampshire carries 5,275 vehicles per day. Across its 748 miles of monitored roads, that adds up to 5,263,011 vehicle-miles traveled per day (≈1.9 billion per year). Trucks are 7.6% of traffic, close to the 7.0% across New Hampshire.

Shorter trips than 67% of counties in New Hampshire

Merrimack's average daily traffic volume is 7% lower than the state average - 5,275 vehicles per day against 5,669. Across the whole network, that travel is about 16% of New Hampshire's statewide total. 56% of counties in New Hampshire see less traffic than Merrimack's 5,275 vehicles per day.

Journey times here (33.3 minutes on average) closely track the state level. Its average travel time of 33.3 minutes is shorter than 67% of counties in New Hampshire.

At 16.9%, the congestion ratio matches the state level closely.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Merrimack County, New Hampshire

Trafficvehicles per day12,228
Trucks9.0%
Average travel time43.1 min
Congestion ratio32.3%
Drivers’ average age48.8 yrs
Drivers’ average income$102,780

A little more than half of the driving in Merrimack County, New Hampshire happens on highways: 60% of all vehicle-miles. The average highway carries 12,228 vehicles per day, 168% more than the average non-highway road in the same area, which carries 4,563 vehicles per day.

Highways make up 26% of the monitored road miles (198 miles, 1,461 segments), so they carry more than their share: 3,146,640 vehicle-miles traveled per day (≈1.1 billion per year).

By highway travel volume, Merrimack outranks 78% of counties in New Hampshire.

More highway trucks than 78% of counties in New Hampshire

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.

Merrimack's highway truck share (9.0%) is higher than 56% of counties in New Hampshire. By raw truck volume, Merrimack carries more highway trucks than 78% of counties in New Hampshire.

non-highway traffic icon

Non-highway Traffic in Merrimack County, New Hampshire

Trafficvehicles per day4,563
Trucks5.5%
Average travel time32.3 min
Congestion ratio15.3%
Drivers’ average age48.0 yrs
Drivers’ average income$101,778

A significant share of driving in Merrimack County, New Hampshire, 40% of vehicle-miles, happens on local roads. A typical local road sees 4,563 vehicles per day.

Spread over 550 miles and 14,278 segments, 74% of the road network, local roads carry a lighter load per mile: 2,116,372 vehicle-miles traveled per day (≈772 million per year). The truck share on non-highway roads is 5.5%.

Drivers from higher-income areas than 78% of counties in New Hampshire

Compared to highways, non-highway routes see 39% fewer trucks by share.

Non-highway congestion (15.3%) runs slightly lower than the state level (5% lower).

Merrimack's average driver income is higher than 78% of counties in New Hampshire. The driver population here skews younger than 78% of counties in New Hampshire.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–8:00 AM and PM peak 4:00 PM–6:00 PM, with volumes reaching approximately 84% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 12% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +11% versus the annual average.
Lowest month:
January is the quietest month, with volumes -13% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Merrimack County, New Hampshire, the peak hour concentrates about 8% of the day's traffic, and there is a strong seasonal swing of +11% in high season.

Merrimack County vs. New Hampshire Traffic Comparison

Merrimack County stays close to the New Hampshire average; the largest gap is its truck share, 8% above.

MetricMerrimack CountyNew Hampshire averageDifference
Traffic5,2755,669-7.0%
Truck % (Total Traffic)7.6%7.0%+8.3%
Truck % (Highway)9.0%8.6%+4.4%
Avg. Travel Time33.3 min32.7 min+2.0%

How Merrimack County compares

Merrimack County against nearby counties

Nothing in this table sets Merrimack County sharply apart from the 4 areas nearest to it, though it has the fourth busiest roads of the five. The same kind of road, simply more of it: traffic per road matches the areas around it while the network itself is larger.

Merrimack 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
Merrimack County5,2757.6%5,263,01133.3 min16.9%
Belknap County, New Hampshire6,4036.9%1,912,52133.9 min20.3%
Hillsborough, New Hampshire7,0836.0%7,274,78432.5 min21.6%
Sullivan County, New Hampshire3,6958.2%858,45034.4 min11.8%
Strafford County, New Hampshire6,7526.2%2,815,77235.6 min21.2%
New Hampshire average5,6697.0%N/A32.7 min17.5%

Merrimack County ranked within New Hampshire

Merrimack County sits in the top quarter of the New Hampshire field on highway travel volume, at #3 of 10.

Merrimack County ranked among 10 county-level areas in New Hampshire (1 = highest).
MeasureMerrimack CountyNew Hampshire rank
Traffic volume (AADT)5,275#5 of 10
Highway vehicle-miles per day3,146,640#3 of 10
Truck share on highways9.0%#5 of 10
Highway trucks per day1,103#3 of 10
Average travel time33.3 min#7 of 10
Average driver income$102,246#3 of 10
Average driver age48.3 yrs#8 of 10

Busiest roads in Merrimack County, New Hampshire

Traffic concentrates on a few corridors: the three busiest roads average 51,113 vehicles a day, against 5,275 on the average road in Merrimack County.

Everett Turnpike leads with 58,767 vehicles a day, 4,707 of them trucks (8.0%). It tops the truck ranking too, with the most trucks.

Senator Styles Bridges Highway carries longer journeys than most roads here, with a median trip of 52.3 minutes against 33.3 county-wide.

Freight stands out on Sen Styles Bridges Highway: trucks are 12.9% of the traffic there, against 7.6% county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Everett TurnpikeMotorway · 58,767vehicles4,707trucks · 8.0%
Road class
Motorway
Congestion ratio
36.4%
Median trip time
46.8 min
Drivers’ median age
48.3 yrs
Drivers’ average income
$107,775

Everett Turnpike carries through traffic: the median trip using it lasts 46.8 minutes, against 33.3 for the county.

2I 93Motorway · 50,146vehicles4,612trucks · 9.2%
Road class
Motorway
Congestion ratio
48.0%
Median trip time
44.8 min
Drivers’ median age
47.7 yrs
Drivers’ average income
$110,538

Delays build on I 93: its congestion ratio of 48% over free-flow time is well above the county's 17%.

3Styles Bridges HighwayMotorway · 44,427vehicles3,333trucks · 7.5%
Road class
Motorway
Congestion ratio
64.4%
Median trip time
44.3 min
Drivers’ median age
49.6 yrs
Drivers’ average income
$104,788

Travel on Styles Bridges Highway's busiest stretch runs 64% over free-flow time, against 17% across the county, so expect slower peak hours.

4Senator Styles Bridges HighwayMotorway · 34,248vehicles3,647trucks · 10.7%
Road class
Motorway
Congestion ratio
30.3%
Median trip time
52.3 min
Drivers’ median age
50.4 yrs
Drivers’ average income
$95,306

Senator Styles Bridges Highway carries 6.5 times the county average on its busiest stretch, where the median trip lasts 52.3 minutes.

5Sen Styles Bridges HighwayMotorway · 28,420vehicles3,676trucks · 12.9%
Road class
Motorway
Congestion ratio
32.0%
Median trip time
49.6 min
Drivers’ median age
51.4 yrs
Drivers’ average income
$97,762

Drivers on Sen Styles Bridges Highway are on long journeys, a median 49.6 minutes against 33.3 county-wide: a through route more than a local street.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Everett TurnpikeMotorway · #1 by traffic58,767vehicles4,707trucks · 8.0%
2I 93Motorway · #2 by traffic50,146vehicles4,612trucks · 9.2%
3Sen Styles Bridges HighwayMotorway · #5 by traffic28,420vehicles3,676trucks · 12.9%
4Senator Styles Bridges HighwayMotorway · #4 by traffic34,248vehicles3,647trucks · 10.7%
5Styles Bridges HighwayMotorway · #3 by traffic44,427vehicles3,333trucks · 7.5%
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

MerrimackDepartment 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 Merrimack County

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

Need segment-level traffic data?

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