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Traffic heat map of Frederick County, Maryland: 956 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Frederick Freeway

Frederick County, Maryland Traffic Counts

Traffic analytics for Frederick County, Maryland, calculated from real-world mobile and sensor networks on 20,173 road segments (956 road miles, about 250 ft each). Its drivers come from neighborhoods among the top 5 counties in Maryland for household income. 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
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total traffic icon

Total Traffic Volume & Performance in Frederick County, Maryland

Traffic

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

vehicles per day4,813
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.

30.0 min
Congestion ratio

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

14.4%
Drivers’ average age

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

45.8 yrs
Drivers’ average income

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

$130,037

A typical monitored road in Frederick County, Maryland sees 4,813 vehicles per day, while its 956 miles of monitored roads together handle 7,587,142 vehicle-miles traveled per day (≈2.8 billion per year). At 9.1%, the truck share runs above the 7.5% across Maryland: about 1 in 11 vehicles.

Shorter trips than 91% of counties in Maryland

Frederick's average daily traffic volume is 37% lower than the state average - 4,813 vehicles per day against 7,693 - suggesting less traffic load per road - less drive-by exposure for retail, but easier access for deliveries. Network-wide, Frederick accounts for about 5.5% of Maryland's statewide total of vehicle-miles. 52% of counties in Maryland see more traffic than Frederick's 4,813 vehicles per day.

The average trip takes 30.0 minutes, 12% lower than the state level. 91% of counties in Maryland have a longer average travel time than Frederick's 30.0 minutes.

Congestion runs 30% lower than the state level, at a ratio of 14.4%, which means smoother traffic flow - travel times are easy to plan around for scheduled deliveries.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Frederick County, Maryland

Trafficvehicles per day23,043
Trucks11.7%
Average travel time42.7 min
Congestion ratio43.5%
Drivers’ average age46.2 yrs
Drivers’ average income$123,103

Highways carry more than half of all travel in Frederick County, Maryland (60% of vehicle-miles). The average highway carries 23,043 vehicles per day, 457% more than the average non-highway road in the same area, which carries 4,138 vehicles per day.

Yet highways are only 19% of the road network, 178 miles in 721 segments, so each mile of them is 3.3 times as busy as the average road mile.

That is more highway travel volume than 78% of counties in Maryland.

Higher highway truck share than 70% of counties in Maryland

Highway truck concentration here runs 20% higher than the state average, at 11.7%. Highways here lean toward freight, so highway access is a real asset for logistics operators.

70% of counties in Maryland see a lower highway truck share than Frederick's 11.7%. By raw truck volume, Frederick carries more highway trucks than 65% of counties in Maryland.

non-highway traffic icon

Non-highway Traffic in Frederick County, Maryland

Trafficvehicles per day4,138
Trucks5.1%
Average travel time29.5 min
Congestion ratio13.3%
Drivers’ average age45.3 yrs
Drivers’ average income$136,638

Local roads carry a significant share of travel in Frederick County, Maryland: 40% of all vehicle-miles. A typical local road sees 4,138 vehicles per day.

Spread over 779 miles and 19,452 segments, 81% of the road network, local roads carry a lighter load per mile: 3,008,009 vehicle-miles traveled per day (≈1.1 billion per year). Trucks make up 5.1% of non-highway traffic, about 1 in 20 vehicles.

Drivers from higher-income areas than 83% of counties in Maryland

Non-highway roads carry a truck concentration that's 57% lower than the highway network.

Non-highway congestion (13.3%) runs 31% lower than the state average, pointing to smoother local traffic flow.

83% of counties in Maryland see lower average driver income among trip origins than Frederick. Frederick's median driver age is lower than 70% of counties in Maryland.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 10:00 AM–12:00 PM and PM peak 4:00 PM–6:00 PM, with volumes reaching approximately 78% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 14% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
August–October is the high season, with volumes +4% 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 Frederick County, Maryland, the peak hour concentrates about 7% of the day's traffic, and there is a noticeable seasonal swing of +4% in high season.

Frederick County vs. Maryland Traffic Comparison

Of the four measures, average daily traffic per road differs most: Frederick County runs 37% below the Maryland average. Its truck share, by contrast, is 21% above.

MetricFrederick CountyMaryland averageDifference
Traffic4,8137,693-37.4%
Truck % (Total Traffic)9.1%7.5%+21.4%
Truck % (Highway)11.7%9.8%+20.1%
Avg. Travel Time30.0 min34.0 min-11.9%

How Frederick County compares

Frederick County against nearby counties

Frederick 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.

Frederick 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
Frederick County4,8139.1%7,587,14230.0 min14.4%
Washington County, Maryland4,57213.9%4,960,20933.9 min16.0%
Montgomery County, Maryland8,7045.7%17,486,10035.5 min21.0%
Carroll County, Maryland4,5206.5%3,223,15631.9 min13.4%
Jefferson County, West Virginia6,8806.0%2,066,94428.8 min19.1%
Maryland average7,6937.5%N/A34.0 min20.5%

Frederick County ranked within Maryland

Average travel time places Frederick County #22 of 24 in Maryland - the bottom quarter of the state.

Frederick County ranked among 24 county-level areas in Maryland (1 = highest).
MeasureFrederick CountyMaryland rank
Traffic volume (AADT)4,813#13 of 24
Highway vehicle-miles per day4,579,133#6 of 24
Truck share on highways11.7%#8 of 24
Highway trucks per day2,701#9 of 24
Average travel time30.0 min#22 of 24
Average driver income$130,037#5 of 24
Average driver age45.8 yrs#17 of 24

The two ends of this table sit far apart: #5 of 24 on average driver income, against #22 of 24 on average travel time.

Busiest roads in Frederick County, Maryland

Traffic concentrates on a few corridors: the three busiest roads average 75,894 vehicles a day, against 4,813 on the average road in Frederick County.

Frederick Freeway leads with 83,827 vehicles a day, 4,987 of them trucks (6.0%). I 70 carries the most trucks, 10,225 a day (14.5% of its traffic), although it ranks #3 for all traffic.

Trips using Dwight D Eisenhower Highway are long: a median of 50.7 minutes against 30.0 county-wide, the mark of a through route.

Freight stands out on Dwight D Eisenhower Highway and I 70: trucks are 17.2% and 14.5% of the traffic there, against 9.1% county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Frederick FreewayMotorway · 83,827vehicles4,987trucks · 6.0%
Road class
Motorway
Congestion ratio
86.7%
Median trip time
34.6 min
Drivers’ median age
46.2 yrs
Drivers’ average income
$122,925

Travel on Frederick Freeway's busiest stretch runs 87% over free-flow time, against 14% across the county, so expect slower peak hours.

2Eisenhower Memorial HighwayMotorway · 73,437vehicles8,684trucks · 11.8%
Road class
Motorway
Congestion ratio
77.4%
Median trip time
42.0 min
Drivers’ median age
45.1 yrs
Drivers’ average income
$131,290

Eisenhower Memorial Highway is one of the more congested roads here: trips take 77% longer than at free-flow speed, against 14% county-wide.

3I 70Motorway · 70,418vehicles10,225trucks · 14.5%
Road class
Motorway
Congestion ratio
60.0%
Median trip time
50.4 min
Drivers’ median age
46.5 yrs
Drivers’ average income
$117,524

I 70 carries through traffic: the median trip using it lasts 50.4 minutes, against 30.0 for the county.

4Dwight D Eisenhower HighwayMotorway · 55,170vehicles9,516trucks · 17.2%
Road class
Motorway
Congestion ratio
43.8%
Median trip time
50.7 min
Drivers’ median age
46.9 yrs
Drivers’ average income
$101,556

At 11.5 times the county average, Dwight D Eisenhower Highway draws drivers from neighborhoods averaging $101,556 in household income.

5Catoctin Mountain HighwayTrunk road · 48,331vehicles3,882trucks · 8.0%
Road class
Trunk road
Congestion ratio
61.0%
Median trip time
39.0 min
Drivers’ median age
46.8 yrs
Drivers’ average income
$105,508

A main artery: Catoctin Mountain Highway's busiest stretch carries 10.0 times the county average; trucks are 8.0% of it, below the county-wide 9.1%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 70Motorway · #3 by traffic70,418vehicles10,225trucks · 14.5%
2Dwight D Eisenhower HighwayMotorway · #4 by traffic55,170vehicles9,516trucks · 17.2%
3Eisenhower Memorial HighwayMotorway · #2 by traffic73,437vehicles8,684trucks · 11.8%
4Frederick FreewayMotorway · #1 by traffic83,827vehicles4,987trucks · 6.0%
5Catoctin Mountain HighwayTrunk road · #5 by traffic48,331vehicles3,882trucks · 8.0%
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

FrederickDepartment 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 Frederick County

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

Need segment-level traffic data?

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