
Total Traffic Volume & Performance in Calvert County, Maryland
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day5,326 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 5.9% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 28.5 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. | 14.7% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 47.3 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $132,452 |
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A typical monitored road in Calvert County, Maryland sees 5,326 vehicles per day, while its 270 miles of monitored roads together handle 1,941,348 vehicle-miles traveled per day (≈709 million per year). Trucks are a smaller part of the mix than across Maryland: 5.9% against 7.5%.
The shortest trips of any county in Maryland
Calvert's average daily traffic volume is 31% lower than the state average - 5,326 vehicles per day against 7,693 - suggesting less traffic load per road - lighter roads for freight, but less passing trade for roadside retail. Across the whole network, that travel is about 1.4% of Maryland's statewide total. 52% of counties in Maryland see less traffic than Calvert's 5,326 vehicles per day.
Journey times run 16% lower than the state level, at 28.5 minutes on average. Calvert additionally records the lowest average travel time of any county in Maryland - 28.5 minutes.
At 28% lower than the state level, the 14.7% congestion ratio signals smoother traffic flow - fewer delays make delivery windows more reliable.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Calvert County, Maryland
| Traffic | vehicles per day17,859 |
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| Trucks | 6.4% |
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| Average travel time | 32.8 min |
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| Congestion ratio | 40.1% |
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| Drivers’ average age | 47.0 yrs |
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| Drivers’ average income | $132,511 |
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Highways carry more than half of all travel in Calvert County, Maryland (61% of vehicle-miles). The average highway carries 17,859 vehicles per day, 358% more than the average non-highway road in the same area, which carries 3,904 vehicles per day.
With 27% of the road miles (72 miles in 728 segments), highways punch above their length, carrying 1,182,167 vehicle-miles traveled per day (≈431 million per year).
Lower highway truck share than 91% of counties in Maryland
Highway truck concentration here runs 34% lower than the state average, at 6.4%. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.
Calvert's highway truck share (6.4%) is lower than 91% of counties in Maryland. 83% of counties in Maryland see more highway trucks per day than Calvert's roughly 1,148.

Non-highway Traffic in Calvert County, Maryland
| Traffic | vehicles per day3,904 |
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| Trucks | 5.0% |
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| Average travel time | 28.0 min |
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| Congestion ratio | 11.8% |
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| Drivers’ average age | 48.0 yrs |
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| Drivers’ average income | $132,375 |
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A significant share of driving in Calvert County, Maryland, 39% of vehicle-miles, happens on local roads. The average non-highway road carries 3,904 vehicles per day.
Local roads make up 73% of the monitored road miles (197 miles in 6,415 segments) but carry less than their share of travel: 759,181 vehicle-miles traveled per day (≈277 million per year). Trucks make up 5.0% of non-highway traffic, about 1 in 20 vehicles.
Drivers from higher-income areas than 91% of counties in Maryland
Non-highway roads carry a truck concentration that's 22% lower than the highway network.
Non-highway congestion (11.8%) runs 38% lower than the state average, pointing to smoother local traffic flow.
91% of counties in Maryland see lower average driver income among trip origins than Calvert. Calvert's median driver age is lower than 52% of counties in Maryland.