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Traffic heat map of Harford County, Maryland: 566 miles of roads shaded from blue (light) to red (heavy traffic), busiest on John F. Kennedy Memorial Highway

Harford County, Maryland Traffic Counts

Our Harford County, Maryland traffic data covers 16,481 road segments over 566 road miles, with an average segment of just 181 ft. Its busiest road, John F. Kennedy Memorial Highway, carries 88,589 vehicles a day, 11.2 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 Harford County, Maryland

Traffic

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

vehicles per day7,891
Trucks

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

8.9%
Average travel time

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

31.9 min
Congestion ratio

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

21.4%
Drivers’ average age

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

47.7 yrs
Drivers’ average income

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

$117,709

A typical monitored road in Harford County, Maryland sees 7,891 vehicles per day, while its 566 miles of monitored roads together handle 5,829,468 vehicle-miles traveled per day (≈2.1 billion per year). Trucks are 8.9% of traffic, more than the 7.5% across Maryland.

Busier roads than 74% of counties in Maryland

The average road in Harford carries 7,891 vehicles per day, essentially matching the state average of 7,693. Network-wide, Harford accounts for about 4.3% of Maryland's statewide total of vehicle-miles. 74% of counties in Maryland see less traffic than Harford's 7,891 vehicles per day.

The average trip takes 31.9 minutes, 6% lower than the state level. Its average travel time of 31.9 minutes is shorter than 74% of counties in Maryland.

At 21.4%, the congestion ratio matches the state level closely.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Harford County, Maryland

Trafficvehicles per day16,693
Trucks12.9%
Average travel time39.3 min
Congestion ratio34.5%
Drivers’ average age46.9 yrs
Drivers’ average income$109,518

Travel in Harford County, Maryland splits roughly evenly, with about half of it (51% of vehicle-miles) on highways. The average highway carries 16,693 vehicles per day, 136% more than the average non-highway road in the same area, which carries 7,067 vehicles per day.

With 22% of the road miles (123 miles in 1,412 segments), highways punch above their length, carrying 2,953,974 vehicle-miles traveled per day (≈1.1 billion per year).

By highway travel volume, Harford outranks 70% of counties in Maryland.

Higher highway truck share than 78% of counties in Maryland

At 12.9%, highway truck share is 32% higher than the state average. Highways here lean toward freight, so highway access is a real asset for logistics operators.

78% of counties in Maryland see a lower highway truck share than Harford's 12.9%. 70% of counties in Maryland see fewer highway trucks per day than Harford's roughly 2,155.

non-highway traffic icon

Non-highway Traffic in Harford County, Maryland

Trafficvehicles per day7,067
Trucks4.8%
Average travel time31.1 min
Congestion ratio20.2%
Drivers’ average age48.2 yrs
Drivers’ average income$122,482

Travel in Harford County, Maryland splits roughly evenly, with about half of it (49% of vehicle-miles) on local roads. The average non-highway road carries 7,067 vehicles per day.

Spread over 443 miles and 15,069 segments, 78% of the road network, local roads carry a lighter load per mile: 2,875,494 vehicle-miles traveled per day (≈1.0 billion per year). Trucks make up 4.8% of non-highway traffic, about 1 in 21 vehicles.

Local roads carry 63% fewer trucks by share than highways

The concentration of trucks on non-highway roads is 63% lower than on highways.

Non-highway congestion (20.2%) runs slightly higher than the state level (5% higher).

Harford's average driver income is higher than 61% of counties in Maryland. The driver population here skews older than 57% of counties in Maryland.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–9:00 AM and PM peak 4:00 PM–6:00 PM, with volumes reaching approximately 78% higher than the daily average.
Weekend traffic:
Weekends are much quieter: volumes run about 20% below weekday levels, the signature of a commute-driven road network.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
Traffic is nearly flat through the year: even June–August, the busiest stretch, runs only +2% versus the annual average.
Lowest month:
January is the quietest month, with volumes -7% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Harford County, Maryland, the peak hour concentrates about 7% of the day's traffic, and traffic stays steady through the year (+2% in high season).

Harford County vs. Maryland Traffic Comparison

Harford County's biggest difference from the Maryland average is its highway truck share, 32% above it. Its truck share is also 19% above.

MetricHarford CountyMaryland averageDifference
Traffic7,8917,693+2.6%
Truck % (Total Traffic)8.9%7.5%+19.1%
Truck % (Highway)12.9%9.8%+32.3%
Avg. Travel Time31.9 min34.0 min-6.4%

How Harford County compares

Harford County against nearby counties and cities

Harford 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.

Harford County and the 4 nearest county-level areas by centroid distance, with the Maryland average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Harford County7,8918.9%5,829,46831.9 min21.4%
Cecil County, Maryland4,10413.9%3,250,79834.6 min11.8%
Baltimore County, Maryland10,4786.8%19,211,87134.2 min23.6%
Kent County, Maryland2,4788.4%482,55529.6 min11.2%
Baltimore City, Maryland10,2026.7%7,782,61338.1 min25.4%
Maryland average7,6937.5%N/A34.0 min20.5%

Harford County ranked within Maryland

Harford County sits in the top quarter of the Maryland field on truck share on highways, at #6 of 24.

Harford County ranked among 24 county-level areas in Maryland (1 = highest).
MeasureHarford CountyMaryland rank
Traffic volume (AADT)7,891#7 of 24
Highway vehicle-miles per day2,953,974#8 of 24
Truck share on highways12.9%#6 of 24
Highway trucks per day2,155#8 of 24
Average travel time31.9 min#18 of 24
Average driver income$117,709#10 of 24
Average driver age47.7 yrs#11 of 24

Busiest roads in Harford County, Maryland

The three busiest roads in Harford County average 51,678 vehicles a day, 6.5 times the county average of 7,891 across all its monitored roads.

John F. Kennedy Memorial Highway leads with 88,589 vehicles a day, 15,718 of them trucks (17.7%). No other road comes close: Vietnam Veterans Memorial Highway, in second place, carries 37,731. It tops the truck ranking too, with the most trucks.

Trips using I 95 are long: a median of 53.1 minutes against 31.9 county-wide, the mark of a through route.

Freight stands out on John F. Kennedy Memorial Highway and I 95: trucks are 17.7% and 16.8% of the traffic there, against 8.9% county-wide.

The truck ranking looks different from the traffic one, sharing just 2 of its 5 roads.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1John F. Kennedy Memorial HighwayMotorway · 88,589vehicles15,718trucks · 17.7%
Road class
Motorway
Congestion ratio
62.5%
Median trip time
50.6 min
Drivers’ median age
45.5 yrs
Drivers’ average income
$109,869

Delays build on John F. Kennedy Memorial Highway: its congestion ratio of 62% over free-flow time is well above the county's 21%.

2Vietnam Veterans Memorial HighwayTrunk road · 37,731vehicles1,466trucks · 3.9%
Road class
Trunk road
Congestion ratio
31.5%
Median trip time
29.9 min
Drivers’ median age
47.2 yrs
Drivers’ average income
$116,243

The busiest stretch of Vietnam Veterans Memorial Highway carries 4.8 times the county average; trucks are 3.9% of it, below the county-wide 8.9%.

3Rock Spring RoadPrimary road · 28,713vehicles1,034trucks · 3.6%
Road class
Primary road
Congestion ratio
64.2%
Median trip time
30.4 min
Drivers’ median age
48.9 yrs
Drivers’ average income
$124,177

Travel on Rock Spring Road's busiest stretch runs 64% over free-flow time, against 21% across the county, so expect slower peak hours.

4Philadelphia BoulevardTrunk road · 27,375vehicles2,127trucks · 7.8%
Road class
Trunk road
Congestion ratio
41.1%
Median trip time
32.5 min
Drivers’ median age
46.4 yrs
Drivers’ average income
$94,558

On its busiest stretch, Philadelphia Boulevard carries 3.5 times the county average; trucks are 7.8% of it, below the county-wide 8.9%.

5Baltimore PikePrimary road · 27,152vehicles899trucks · 3.3%
Road class
Primary road
Congestion ratio
44.0%
Median trip time
33.5 min
Drivers’ median age
48.3 yrs
Drivers’ average income
$121,257

Baltimore Pike peaks at 27,152 vehicles a day, 3.4 times the county average; trucks are 3.3% of it, below the county-wide 8.9%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1John F. Kennedy Memorial HighwayMotorway · #1 by traffic88,589vehicles15,718trucks · 17.7%
2I 95Motorway · 21,311vehicles3,578trucks · 16.8%
Road class
Motorway
Congestion ratio
60.5%
Median trip time
53.1 min
Drivers’ median age
43.4 yrs
Drivers’ average income
$113,350

I 95 carries 2.7 times the county average at its busiest, 3,578 of them trucks (16.8%, above the county-wide 8.9%).

3Philadelphia BoulevardTrunk road · #4 by traffic27,375vehicles2,127trucks · 7.8%
4Pulaski HighwayTrunk road · 27,117vehicles1,727trucks · 6.4%
Road class
Trunk road
Congestion ratio
32.7%
Median trip time
32.9 min
Drivers’ median age
47.8 yrs
Drivers’ average income
$93,868

Pulaski Highway carries 3.4 times the county average on its busiest stretch, where the median trip lasts 32.9 minutes.

5Aberdeen ThruwayTrunk road · 26,642vehicles1,590trucks · 6.0%
Road class
Trunk road
Congestion ratio
33.8%
Median trip time
32.7 min
Drivers’ median age
47.9 yrs
Drivers’ average income
$97,357

At 3.4 times the county average, Aberdeen Thruway draws drivers from neighborhoods averaging $97,357 in household income.

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

HarfordDepartment 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 Harford County

The same traffic breakdown for the areas closest to Harford County, Maryland.

Need segment-level traffic data?

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