
Total Traffic Volume & Performance in Adams County, Pennsylvania
Traffic The average number of vehicles that travel each day over any road in the road network. | vehicles per day4,147 |
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Trucks The percentage of the total traffic volume composed of heavy vehicles. | 9.6% |
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Average travel time The average time of travel averaged among all vehicles traveling on the road network. | 34.8 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. | 13.3% |
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Drivers’ average age Average age of residents in the geographic areas where the vehicle trips originated. | 50.9 yrs |
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Drivers’ average income Average income of residents in the geographic areas where the vehicle trips originated. | $87,122 |
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The average monitored road in Adams County, Pennsylvania carries 4,147 vehicles per day. Across its 555 miles of monitored roads, that adds up to 2,092,304 vehicle-miles traveled per day (≈764 million per year). Trucks are 9.6% of traffic, close to the 10.6% across Pennsylvania.
Longer trips than 71% of counties in Pennsylvania
At 4,147 vehicles per day, the average monitored road in Adams carries 26% less traffic than the state average of 5,617, suggesting less demand on each road - lighter roads for freight, but less passing trade for roadside retail. Across the whole network, that travel is about 1.0% of Pennsylvania's statewide total. By volume, Adams's 4,147 vehicles per day outpaces 64% of counties in Pennsylvania.
Journey times here (34.8 minutes on average) closely track the state level. Its average travel time of 34.8 minutes is longer than 71% of counties in Pennsylvania.
The congestion ratio of 13.3% is 19% lower, pointing to smoother traffic flow than the state level - crucial for traffic control improvement and logistics planning.
Highway vs. Non-Highway Traffic Analysis

Highway Traffic in Adams County, Pennsylvania
| Traffic | vehicles per day10,122 |
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| Trucks | 13.4% |
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| Average travel time | 38.0 min |
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| Congestion ratio | 27.9% |
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| Drivers’ average age | 50.9 yrs |
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| Drivers’ average income | $87,246 |
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Highways carry about half of all travel in Adams County, Pennsylvania, 50% of vehicle-miles. The average highway carries 10,122 vehicles per day, 260% more than the average non-highway road in the same area, which carries 2,809 vehicles per day.
With 21% of the road miles (114 miles in 1,783 segments), highways punch above their length, carrying 1,040,666 vehicle-miles traveled per day (≈380 million per year).
Fewer highway trucks than 75% of counties in Pennsylvania
Highway truck concentration here runs 15% lower than the state average, at 13.4%. The highway traffic mix is typical for Pennsylvania: neither freight- nor commuter-dominated.
Adams's highway truck share (13.4%) is lower than 68% of counties in Pennsylvania. 75% of counties in Pennsylvania see more highway trucks per day than Adams's roughly 1,358.

Non-highway Traffic in Adams County, Pennsylvania
| Traffic | vehicles per day2,809 |
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| Trucks | 5.9% |
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| Average travel time | 34.1 min |
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| Congestion ratio | 10.1% |
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| Drivers’ average age | 50.7 yrs |
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| Drivers’ average income | $87,041 |
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Local roads carry about half of all travel in Adams County, Pennsylvania, 50% of vehicle-miles. The average non-highway road carries 2,809 vehicles per day.
Local roads make up 79% of the monitored road miles (441 miles in 7,965 segments) but carry less than their share of travel: 1,051,638 vehicle-miles traveled per day (≈384 million per year). About 1 in 17 vehicles on non-highway roads is a truck (5.9%).
Drivers from higher-income areas than 79% of counties in Pennsylvania
Compared to highways, non-highway routes see 56% fewer trucks by share.
At 36% lower than the state level, the non-highway congestion ratio of 10.1% signals easier movement on local roads.
79% of counties in Pennsylvania see lower average driver income among trip origins than Adams. 56% of counties in Pennsylvania have a younger driver population than Adams.