
Total Traffic Volume & Performance in Montgomery County, Maryland
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day8,704 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 5.7% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 35.5 min |
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Congestion ratio The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network. | 21.0% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 45.1 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $151,219 |
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The average monitored road in Montgomery County, Maryland carries 8,704 vehicles per day. Across its 1,377 miles of monitored roads, that adds up to 17,486,100 vehicle-miles traveled per day (≈6.4 billion per year). About 1 in 18 vehicles is a truck, fewer than the 1 in 13 across Maryland.
Longer trips than 87% of counties in Maryland
Montgomery's average daily traffic volume is 13% higher than the state average - 8,704 vehicles per day against 7,693 - a factor worth weighing in site selection and logistics planning. Network-wide, Montgomery accounts for about 13% of Maryland's statewide total of vehicle-miles. 83% of counties in Maryland see less traffic than Montgomery's 8,704 vehicles per day.
At 35.5 minutes, the average travel time matches the state level closely. Its average travel time of 35.5 minutes is longer than 87% of counties in Maryland.
At 21.0%, the congestion ratio matches the state level closely.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Montgomery County, Maryland
| Traffic | vehicles per day32,764 |
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| Trucks | 7.5% |
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| Average travel time | 41.4 min |
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| Congestion ratio | 50.2% |
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| Drivers’ average age | 44.6 yrs |
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| Drivers’ average income | $146,039 |
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A significant share of driving in Montgomery County, Maryland, 44% of vehicle-miles, happens on highways. The average highway carries 32,764 vehicles per day, 319% more than the average non-highway road in the same area, which carries 7,819 vehicles per day.
Yet highways are only 13% of the road network, 180 miles in 1,321 segments, so each mile of them is 3.4 times as busy as the average road mile.
By highway travel volume, that ranks Montgomery in the top 5 counties in Maryland.
Lower highway truck share than 87% of counties in Maryland
Highway truck concentration here runs 23% lower than the state average, at 7.5%. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.
By truck concentration, highways here trail 87% of counties in Maryland. By raw truck volume, Montgomery carries more highway trucks than 74% of counties in Maryland.

Non-highway Traffic in Montgomery County, Maryland
| Traffic | vehicles per day7,819 |
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| Trucks | 4.2% |
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| Average travel time | 35.3 min |
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| Congestion ratio | 19.9% |
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| Drivers’ average age | 45.5 yrs |
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| Drivers’ average income | $153,789 |
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A little more than half of the driving in Montgomery County, Maryland happens on local roads: 56% of all vehicle-miles. The average non-highway road carries 7,819 vehicles per day.
Spread over 1,197 miles and 35,909 segments, 87% of the road network, local roads carry a lighter load per mile: 9,712,375 vehicle-miles traveled per day (≈3.5 billion per year). The truck share on non-highway roads is 4.2%.
Drivers from higher-income areas than 96% of counties in Maryland
The concentration of trucks on non-highway roads is 45% lower than on highways.
Non-highway congestion here (19.9%) closely tracks the state average.
Montgomery's average driver income is higher than 96% of counties in Maryland. 85% of counties in Maryland have an older driver population than Montgomery.