
Total Traffic Volume & Performance in Mercer County, West Virginia
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day7,690 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 13.7% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 34.2 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. | 22.3% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 50.3 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $52,965 |
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The average monitored road in Mercer County, West Virginia carries 7,690 vehicles per day. Across its 337 miles of monitored roads, that adds up to 3,165,215 vehicle-miles traveled per day (≈1.2 billion per year). At 13.7%, the truck share runs above the 11.0% across West Virginia: about 1 in 7 vehicles.
Longer trips than 89% of counties in West Virginia
Mercer's average daily traffic volume of 7,690 vehicles per day is on par with the state average of 7,367. Network-wide, Mercer accounts for about 4.3% of West Virginia's statewide total of vehicle-miles. 81% of counties in West Virginia see less traffic than Mercer's 7,690 vehicles per day.
The average trip takes 34.2 minutes, 11% higher than the state level. On travel time, Mercer runs longer than 89% of counties in West Virginia.
At 22.3%, the congestion ratio matches the state level closely.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Mercer County, West Virginia
| Traffic | vehicles per day16,646 |
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| Trucks | 17.4% |
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| Average travel time | 43.2 min |
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| Congestion ratio | 39.9% |
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| Drivers’ average age | 50.1 yrs |
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| Drivers’ average income | $55,524 |
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Highways carry more than half of all travel in Mercer County, West Virginia (68% of vehicle-miles). The average highway carries 16,646 vehicles per day, 141% more than the average non-highway road in the same area, which carries 6,910 vehicles per day.
With 34% of the road miles (114 miles in 271 segments), highways punch above their length, carrying 2,146,821 vehicle-miles traveled per day (≈784 million per year).
No more than 4 other counties in West Virginia move more traffic on their highways.
More highway trucks than 91% of counties in West Virginia
The concentration of trucks on highways (17.4%) is 15% higher than the state average for similar road classifications. Highways here lean toward freight, so highway access is a real asset for logistics operators.
By truck concentration, highways here outrank 80% of counties in West Virginia. By raw truck volume, Mercer carries more highway trucks than 91% of counties in West Virginia.

Non-highway Traffic in Mercer County, West Virginia
| Traffic | vehicles per day6,910 |
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| Trucks | 6.0% |
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| Average travel time | 33.5 min |
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| Congestion ratio | 20.8% |
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| Drivers’ average age | 50.3 yrs |
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| Drivers’ average income | $50,741 |
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Local roads carry a significant share of travel in Mercer County, West Virginia: 32% of all vehicle-miles. The average non-highway road carries 6,910 vehicles per day.
Local roads make up 66% of the monitored road miles (223 miles in 3,111 segments) but carry less than their share of travel: 1,018,394 vehicle-miles traveled per day (≈372 million per year). The truck share on non-highway roads is 6.0%.
Drivers from lower-income areas than 76% of counties in West Virginia
Non-highway roads carry a truck concentration that's 65% lower than the highway network.
At 20.8%, the non-highway congestion ratio matches the state level closely.
Trip origins here have lower average income than 76% of counties in West Virginia. 57% of counties in West Virginia have an older driver population than Mercer.