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TrafficThe average number of vehicles that travel each day over any road in the road network. | vehicles per day3,674 |
|---|---|
TrucksThe percentage of the total traffic volume composed of heavy vehicles. | 14.3% |
Average travel timeThe average time of travel averaged among all vehicles traveling on the road network. | 42.5 min |
Congestion ratioThe rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network. | 12.3% |
Drivers’ average ageAverage age of residents in the geographic areas where the vehicle trips originated. | 52.5 yrs |
Drivers’ average incomeAverage income of residents in the geographic areas where the vehicle trips originated. | $65,765 |
A typical monitored road in Mercer County, Pennsylvania sees 3,674 vehicles per day, while its 687 miles of monitored roads together handle 2,697,606 vehicle-miles traveled per day (≈985 million per year). Trucks are 14.3% of traffic, more than the 10.6% across Pennsylvania.
Mercer sees 35% lower average daily traffic volume than the state average (3,674 vehicles per day against 5,617), suggesting less demand on each road - less drive-by exposure for retail, but easier access for deliveries. Network-wide, Mercer accounts for about 1.2% of Pennsylvania's statewide total of vehicle-miles. Mercer carries more traffic than 53% of counties in Pennsylvania.
At 42.5 minutes, the average travel time is 23% higher than the state level. On travel time, Mercer runs longer than 97% of counties in Pennsylvania.
Congestion runs 26% lower than the state level, at a ratio of 12.3%, which means smoother traffic flow - travel times are easy to plan around for scheduled deliveries.
| Traffic | vehicles per day10,584 |
|---|---|
| Trucks | 20.2% |
| Average travel time | 51.4 min |
| Congestion ratio | 21.9% |
| Drivers’ average age | 52.9 yrs |
| Drivers’ average income | $66,096 |
A little more than half of the driving in Mercer County, Pennsylvania happens on highways: 57% of all vehicle-miles. The average highway carries 10,584 vehicles per day, 233% more than the average non-highway road in the same area, which carries 3,175 vehicles per day.
Highways make up 22% of the monitored road miles (152 miles, 767 segments), so they carry more than their share: 1,547,115 vehicle-miles traveled per day (≈565 million per year).
By highway travel volume, Mercer outranks 62% of counties in Pennsylvania.
The concentration of trucks on highways (20.2%) is 28% 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 62% of counties in Pennsylvania. Mercer's highway truck count is higher than 59% of counties in Pennsylvania, at roughly 2,136 trucks per day.
| Traffic | vehicles per day3,175 |
|---|---|
| Trucks | 6.4% |
| Average travel time | 41.9 min |
| Congestion ratio | 11.6% |
| Drivers’ average age | 52.2 yrs |
| Drivers’ average income | $65,508 |
A significant share of driving in Mercer County, Pennsylvania, 43% of vehicle-miles, happens on local roads. A typical local road sees 3,175 vehicles per day.
Spread over 535 miles and 10,602 segments, 78% of the road network, local roads carry a lighter load per mile: 1,150,491 vehicle-miles traveled per day (≈420 million per year). Trucks make up 6.4% of non-highway traffic, about 1 in 16 vehicles.
The concentration of trucks on non-highway roads is 68% lower than on highways.
The non-highway congestion ratio of 11.6% is 26% lower than the state level, suggesting more efficient local mobility than the state average.
Trip origins here have lower average income than 70% of counties in Pennsylvania. The driver population here skews older than 82% of counties in Pennsylvania.
Of the four measures, truck share differs most: Mercer County runs 35% above the Pennsylvania average. Its average daily traffic per road, by contrast, is 35% below.
| Metric | Mercer County | Pennsylvania average | Difference |
|---|---|---|---|
| Traffic | 3,674 | 5,617 | -34.6% |
| Truck % (Total Traffic) | 14.3% | 10.6% | +34.6% |
| Truck % (Highway) | 20.2% | 15.8% | +28.1% |
| Avg. Travel Time | 42.5 min | 34.6 min | +22.8% |
Against the 4 nearest areas, Mercer County sees 21.4% longer typical trips; it has the second busiest roads of the five. Trips here run longer without running slower: distance, not congestion, is what drivers spend their time on.
| Area | Average daily traffic | Truck share | Daily vehicle-miles | Average travel time | Congestion ratio |
|---|---|---|---|---|---|
| Mercer County | 3,674 | 14.3% | 2,697,606 | 42.5 min | 12.3% |
| Lawrence County, Pennsylvania | 3,536 | 11.1% | 1,596,672 | 31.7 min | 12.0% |
| Trumbull County, Ohio | 5,289 | 12.3% | 4,042,327 | 34.2 min | 13.4% |
| Crawford County, Pennsylvania | 2,637 | 10.1% | 1,564,721 | 31.1 min | 10.2% |
| Venango County, Pennsylvania | 3,029 | 16.9% | 1,146,377 | 43.0 min | 9.5% |
| Pennsylvania average | 5,617 | 10.6% | N/A | 34.6 min | 16.5% |
On average travel time, Mercer County is among the three highest county-level areas in Pennsylvania.
| Measure | Mercer County | Pennsylvania rank |
|---|---|---|
| Traffic volume (AADT) | 3,674 | #32 of 67 |
| Highway vehicle-miles per day | 1,547,115 | #25 of 64 |
| Truck share on highways | 20.2% | #25 of 64 |
| Highway trucks per day | 2,136 | #27 of 64 |
| Average travel time | 42.5 min | #3 of 67 |
| Average driver income | $65,765 | #47 of 67 |
| Average driver age | 52.5 yrs | #13 of 67 |
Traffic concentrates on a few corridors: the three busiest roads average 29,202 vehicles a day, against 3,674 on the average road in Mercer County.
Connelly Boulevard is the busiest road, at 46,119 vehicles a day, 2,444 of them trucks (5.3%). No other road comes close: I 80, in second place, carries 23,994. I 80 carries the most trucks, 7,298 a day (30.4% of its traffic), although it ranks #2 for all traffic.
Trucks make up 30.4% of traffic on I 80, against 14.3% across all roads in the county.
Connelly Boulevard carries longer journeys than most roads here, with a median trip of 71.1 minutes against 42.5 county-wide.
Connelly Boulevard is busy with cars rather than freight: only 5.3% of its traffic is trucks, against 14.3% county-wide.
Delays build on Connelly Boulevard: its congestion ratio of 62% over free-flow time is well above the county's 12%.
I 80 is a trunk route for the county, carrying 6.5 times the county average on its busiest stretch; trucks are 30.4% of it, above the county-wide 14.3%.
Drivers on I 79 are on long journeys, a median 63.1 minutes against 42.5 county-wide: a through route more than a local street.
Travel on Main Street's busiest stretch runs 48% over free-flow time, against 12% across the county, so expect slower peak hours.
The busiest stretch of Hermitage Road carries 4.0 times the county average; trucks are 4.8% of it, below the county-wide 14.3%.
On its busiest stretch, Beaver Valley Expressway carries 3.9 times the county average; trucks are 9.9% of it, below the county-wide 14.3%.
The average monitored road in Mercer carries 3,674 vehicles per day, 35% less than the Pennsylvania average of 5,617.
Mercer's average travel time of 42.5 minutes is longer than 97% of counties in Pennsylvania.
Drivers on Mercer roads have a median age of 52 years, older than the Pennsylvania average of 48, and the median household income of the neighborhoods trips originate from averages $65,765, 26% below the Pennsylvania average.
Approximately 9% of highway traffic and 5% of non-highway traffic consists of vehicles whose trip originates outside Mercer County, Pennsylvania. Even highway traffic is mostly local, so these roads mainly serve residents and commuters.
Weekday traffic has two busy windows: AM peak 7:00 AM–8:00 AM and a long afternoon plateau from 12:00 PM to 6:00 PM - about 64% above the daily average.
Connelly Boulevard carries the most, 46,119 vehicles per day on its busiest stretch, followed by I 80 (23,994), I 79 (17,494), Main Street (16,852), Hermitage Road (14,725). Figures are AADT, both directions combined.
I 80, with about 7,298 trucks per day on its busiest stretch, 30.4% of its 23,994 vehicles.
About 46,119 vehicles per day in both directions on its busiest stretch, including 2,444 trucks (5.3%). Traffic is lower on its quieter stretches; TrafficZoom shows the count for every segment.

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Historical traffic pattern databases
The same traffic breakdown for the areas closest to Mercer County, Pennsylvania.
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