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Traffic heat map of Butler County, Pennsylvania: 687 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Mars Road and I 79

Butler County, Pennsylvania Traffic Counts

Traffic analytics for Butler County, Pennsylvania, calculated from real-world mobile and sensor networks on 15,887 road segments (687 road miles, about 228 ft each). Its busiest road, Mars Road, carries 40,828 vehicles a day, 7.1 times the average road. Use the figures below to move from assumptions to certainty on retail locations, logistics and road planning.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
Updated:
September 29, 2026
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Total Traffic Volume & Performance in Butler County, Pennsylvania

Traffic

The average number of vehicles that travel each day over any road in the road network.

vehicles per day5,782
Trucks

The percentage of the total traffic volume composed of heavy vehicles.

8.4%
Average travel time

The average time of travel averaged among all vehicles traveling on the road network.

32.7 min
Congestion ratio

The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.

15.4%
Drivers’ average age

Average age of residents in the geographic areas where the vehicle trips originated.

50.3 yrs
Drivers’ average income

Average income of residents in the geographic areas where the vehicle trips originated.

$93,909

A typical monitored road in Butler County, Pennsylvania sees 5,782 vehicles per day, while its 687 miles of monitored roads together handle 3,962,335 vehicle-miles traveled per day (≈1.4 billion per year). Trucks are a smaller part of the mix than across Pennsylvania: 8.4% against 10.6%.

Busier roads than 85% of counties in Pennsylvania

Butler's average daily traffic volume of 5,782 vehicles per day is on par with the state average of 5,617. Network-wide, Butler accounts for about 1.8% of Pennsylvania's statewide total of vehicle-miles. Butler carries more traffic than 85% of counties in Pennsylvania.

The average trip takes 32.7 minutes, 6% lower than the state level. Its average travel time of 32.7 minutes is shorter than 73% of counties in Pennsylvania.

The congestion ratio of 15.4% runs slightly lower than the state level (7% lower).

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Butler County, Pennsylvania

Trafficvehicles per day15,619
Trucks11.6%
Average travel time34.8 min
Congestion ratio25.8%
Drivers’ average age49.7 yrs
Drivers’ average income$95,799

A significant share of driving in Butler County, Pennsylvania, 43% of vehicle-miles, happens on highways. The average highway carries 15,619 vehicles per day, 206% more than the average non-highway road in the same area, which carries 5,110 vehicles per day.

With 19% of the road miles (132 miles in 1,016 segments), highways punch above their length, carrying 1,709,341 vehicle-miles traveled per day (≈624 million per year).

That is more highway travel volume than 65% of counties in Pennsylvania.

Lower highway truck share than 78% of counties in Pennsylvania

Highway truck concentration here runs 26% lower than the state average, at 11.6%. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.

By truck concentration, highways here trail 78% of counties in Pennsylvania. By raw truck volume, Butler carries fewer highway trucks than 67% of counties in Pennsylvania.

non-highway traffic icon

Non-highway Traffic in Butler County, Pennsylvania

Trafficvehicles per day5,110
Trucks5.9%
Average travel time32.5 min
Congestion ratio14.7%
Drivers’ average age50.6 yrs
Drivers’ average income$93,106

Local roads carry more than half of all travel in Butler County, Pennsylvania (57% of vehicle-miles). A typical local road sees 5,110 vehicles per day.

Local roads make up 81% of the monitored road miles (555 miles in 14,871 segments) but carry less than their share of travel: 2,252,994 vehicle-miles traveled per day (≈822 million per year). Trucks make up 5.9% of non-highway traffic, about 1 in 17 vehicles.

Drivers from higher-income areas than 89% of counties in Pennsylvania

Compared to highways, non-highway routes see 49% fewer trucks by share.

Non-highway congestion (14.7%) runs slightly lower than the state level (7% lower).

Trip origins here have higher average income than 89% of counties in Pennsylvania. Butler's median driver age is higher than 50% of counties in Pennsylvania.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–8:00 AM and PM peak 4:00 PM–6:00 PM, with volumes reaching approximately 83% higher than the daily average.
Weekend traffic:
Weekend traffic is about as busy as on weekdays (+1%): leisure and through trips largely replace the commute.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +13% versus the annual average.
Lowest month:
January is the quietest month, with volumes -22% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Butler County, Pennsylvania, the peak hour concentrates about 8% of the day's traffic, and there is a strong seasonal swing of +13% in high season.

Butler County vs. Pennsylvania Traffic Comparison

Butler County's biggest difference from the Pennsylvania average is its highway truck share, 26% below it. Its truck share is also 21% below.

MetricButler CountyPennsylvania averageDifference
Traffic5,7825,617+2.9%
Truck % (Total Traffic)8.4%10.6%-21.4%
Truck % (Highway)11.6%15.8%-26.2%
Avg. Travel Time32.7 min34.6 min-5.6%

How Butler County compares

Butler County has the busiest roads among its nearby counties

Compared with its 4 closest neighbours, Butler County carries 64.0% more traffic on a typical road and is 33.6% more congested; it has the busiest roads of the five. It is where traffic concentrates in this corner of the map - the local bottleneck, with more vehicles per road AND less room to absorb them.

Butler County and the 4 nearest county-level areas by centroid distance, with the Pennsylvania average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Butler County5,7828.4%3,962,33532.7 min15.4%
Lawrence County, Pennsylvania3,53611.1%1,596,67231.7 min12.0%
Armstrong County, Pennsylvania3,0179.2%1,075,36133.2 min9.5%
Beaver County, Pennsylvania3,8749.5%2,868,99433.8 min12.3%
Mercer County, Pennsylvania3,67414.3%2,697,60642.5 min12.3%
Pennsylvania average5,61710.6%N/A34.6 min16.5%

Butler County ranked within Pennsylvania

Butler County sits in the top quarter of the Pennsylvania field on average driver income, at #8 of 67.

Butler County ranked among 67 county-level areas in Pennsylvania (1 = highest); measures without data in every county rank a smaller field, down to 64.
MeasureButler CountyPennsylvania rank
Traffic volume (AADT)5,782#11 of 67
Highway vehicle-miles per day1,709,341#23 of 64
Truck share on highways11.6%#50 of 64
Highway trucks per day1,815#43 of 64
Average travel time32.7 min#49 of 67
Average driver income$93,909#8 of 67
Average driver age50.3 yrs#34 of 67

Butler County ranks #8 of 67 on average driver income but #50 of 64 on truck share on highways - the two describe the same roads and are worth reading together rather than either on its own.

Busiest roads in Butler County, Pennsylvania

Traffic concentrates on a few corridors: the three busiest roads average 32,375 vehicles a day, against 5,782 on the average road in Butler County.

Mars Road leads with 40,828 vehicles a day, 1,610 of them trucks (3.9%). I 80 carries the most trucks, 6,455 a day (38.8% of its traffic), although it is not among the 5 busiest roads overall.

Freight stands out on I 80 and Emlenton Bridge: trucks are 38.8% and 36.8% of the traffic there, against 8.4% county-wide.

Pennsylvania Turnpike carries longer journeys than most roads here, with a median trip of 53.1 minutes against 32.7 county-wide.

Mars Road draws drivers from wealthier areas: their neighborhoods average $121,584 in household income, 29% above the county's $93,909, while those on I 80 average $60,951, 35% below it.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Mars RoadTrunk road · 40,828vehicles1,610trucks · 3.9%
Road class
Trunk road
Congestion ratio
24.9%
Median trip time
33.1 min
Drivers’ median age
49.7 yrs
Drivers’ average income
$121,584

Mars Road is a trunk route for the county, carrying 7.1 times the county average on its busiest stretch; trucks are 3.9% of it, below the county-wide 8.4%.

2I 79Motorway · 32,377vehicles3,790trucks · 11.7%
Road class
Motorway
Congestion ratio
38.7%
Median trip time
47.7 min
Drivers’ median age
47.7 yrs
Drivers’ average income
$98,149

I 79 is one of the more congested roads here: trips take 39% longer than at free-flow speed, against 15% county-wide.

3Perry HighwayTrunk road · 23,920vehicles1,384trucks · 5.8%
Road class
Trunk road
Congestion ratio
29.3%
Median trip time
29.2 min
Drivers’ median age
49.6 yrs
Drivers’ average income
$119,342

On its busiest stretch, Perry Highway carries 4.1 times the county average; trucks are 5.8% of it, below the county-wide 8.4%.

4Pennsylvania TurnpikeMotorway · 19,590vehicles4,689trucks · 23.9%
Road class
Motorway
Congestion ratio
22.0%
Median trip time
53.1 min
Drivers’ median age
49.5 yrs
Drivers’ average income
$98,815

A freight route: trucks are 23.9% of the traffic on Pennsylvania Turnpike's busiest stretch, 2.9 times the county-wide 8.4%.

5Freedom RoadPrimary road · 18,307vehicles918trucks · 5.0%
Road class
Primary road
Congestion ratio
44.0%
Median trip time
28.7 min
Drivers’ median age
49.5 yrs
Drivers’ average income
$108,553

Delays build on Freedom Road: its congestion ratio of 44% over free-flow time is well above the county's 15%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 80Motorway · 16,620vehicles6,455trucks · 38.8%
Road class
Motorway
Congestion ratio
19.9%
Median trip time
52.0 min
Drivers’ median age
50.2 yrs
Drivers’ average income
$60,951

I 80 carries through traffic: the median trip using it lasts 52.0 minutes, against 32.7 for the county.

2Emlenton BridgeMotorway · 17,068vehicles6,274trucks · 36.8%
Road class
Motorway
Median trip time
52.1 min
Drivers’ median age
50.7 yrs
Drivers’ average income
$61,167

Drivers on Emlenton Bridge are on long journeys, a median 52.1 minutes against 32.7 county-wide: a through route more than a local street.

3Pennsylvania TurnpikeMotorway · #4 by traffic19,590vehicles4,689trucks · 23.9%
4I 79Motorway · #2 by traffic32,377vehicles3,790trucks · 11.7%
5Mars RoadTrunk road · #1 by traffic40,828vehicles1,610trucks · 3.9%
How to read these road counts
  • The first number is AADT, annual average daily traffic: the vehicles passing a point on an average day, both directions combined and trucks included. On a divided highway both carriageways are added together.
  • Traffic changes along a road, with more near interchanges and towns and less in open country. Every figure for a road describes its busiest stretch in the county, so the two rankings show the same numbers for the same road.
  • The second number is the trucks on that stretch, a part of its AADT. The bar splits the AADT into cars and light vehicles (blue) and trucks (amber).
  • See segment-level AADT for any road on TrafficZoom.

Data Sources & Methodology

The data presented on this page is derived from TrafficZoom's proprietary analytics platform, which aggregates and normalizes information from multiple sources, including:

Mobile device location data (anonymized and aggregated)

Road sensor networks and traffic counters

Historical traffic pattern databases

Public traffic count programs published by the

ButlerDepartment of Transportation

Demographic Baseline for O-D Modeling

U.S. Census Bureau
All metrics represent estimates based on statistical modeling and are intended for strategic planning purposes.
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Data current as of:
Q3 2026

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Counties near Butler County

The same traffic breakdown for the areas closest to Butler County, Pennsylvania.

Need segment-level traffic data?

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