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Traffic heat map of Chester County, Pennsylvania: 1,523 miles of roads shaded from blue (light) to red (heavy traffic), busiest on County Line Expressway

Chester County, Pennsylvania Traffic Counts

Traffic analytics for Chester County, Pennsylvania, calculated from real-world mobile and sensor networks on 41,529 road segments (1,523 road miles, about 194 ft each). Its drivers come from the highest-income neighborhoods of any county in Pennsylvania, averaging $134,205. 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 icon

Total Traffic Volume & Performance in Chester County, Pennsylvania

Traffic

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

vehicles per day5,452
Trucks

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

7.9%
Average travel time

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

33.2 min
Congestion ratio

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

15.7%
Drivers’ average age

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

47.4 yrs
Drivers’ average income

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

$134,205

A typical monitored road in Chester County, Pennsylvania sees 5,452 vehicles per day, while its 1,523 miles of monitored roads together handle 9,883,324 vehicle-miles traveled per day (≈3.6 billion per year). Trucks are a smaller part of the mix than across Pennsylvania: 7.9% against 10.6%.

Busier roads than 80% of counties in Pennsylvania

The average road in Chester carries 5,452 vehicles per day, essentially matching the state average of 5,617. Network-wide, Chester accounts for about 4.5% of Pennsylvania's statewide total of vehicle-miles. Chester carries more traffic than 80% of counties in Pennsylvania.

Journey times here (33.2 minutes on average) closely track the state level. Its average travel time of 33.2 minutes is shorter than 61% of counties in Pennsylvania.

At 15.7%, the congestion ratio matches the state level closely.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Chester County, Pennsylvania

Trafficvehicles per day15,899
Trucks10.7%
Average travel time40.8 min
Congestion ratio35.4%
Drivers’ average age47.4 yrs
Drivers’ average income$131,287

Highways carry about half of all travel in Chester County, Pennsylvania, 48% of vehicle-miles. The average highway carries 15,899 vehicles per day, 230% more than the average non-highway road in the same area, which carries 4,819 vehicles per day.

With 17% of the road miles (261 miles in 2,374 segments), highways punch above their length, carrying 4,709,450 vehicle-miles traveled per day (≈1.7 billion per year).

By highway travel volume, that ranks Chester in the top 5 counties in Pennsylvania.

Lower highway truck share than 86% of counties in Pennsylvania

At 10.7%, highway truck share is 32% lower than the state average. Highways here mostly serve passenger trips, so local access matters more than long-haul routing for logistics operators.

Chester's highway truck share (10.7%) is lower than 86% of counties in Pennsylvania. Chester's highway truck count is higher than 52% of counties in Pennsylvania, at roughly 1,698 trucks per day.

non-highway traffic icon

Non-highway Traffic in Chester County, Pennsylvania

Trafficvehicles per day4,819
Trucks5.3%
Average travel time32.7 min
Congestion ratio14.5%
Drivers’ average age47.4 yrs
Drivers’ average income$135,892

Local roads carry about half of all travel in Chester County, Pennsylvania, 52% of vehicle-miles. The average non-highway road carries 4,819 vehicles per day.

Local roads make up 83% of the monitored road miles (1,263 miles in 39,155 segments) but carry less than their share of travel: 5,173,875 vehicle-miles traveled per day (≈1.9 billion per year). The truck share on non-highway roads is 5.3%.

The highest driver income of any county in Pennsylvania

Non-highway roads carry a truck concentration that's 50% lower than the highway network.

Non-highway congestion (14.5%) runs slightly lower than the state level (8% lower).

Trips here originate from the highest average driver income in Pennsylvania, at $134,205. 92% of counties in Pennsylvania have an older driver population than Chester.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 7:00 AM–9:00 AM and PM peak 4:00 PM–6:00 PM, with volumes reaching approximately 75% higher than the daily average.
Weekend traffic:
Weekends are somewhat quieter: volumes run about 5% below weekday levels, the usual weekend dip.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
May–July is the high season, with volumes +6% versus the annual average.
Lowest month:
January is the quietest month, with volumes -13% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Chester County, Pennsylvania, the peak hour concentrates about 7% of the day's traffic, and there is a noticeable seasonal swing of +6% in high season.

Chester County vs. Pennsylvania Traffic Comparison

Of the four measures, highway truck share differs most: Chester County runs 32% below the Pennsylvania average. Its truck share is also 26% below.

MetricChester CountyPennsylvania averageDifference
Traffic5,4525,617-2.9%
Truck % (Total Traffic)7.9%10.6%-26.1%
Truck % (Highway)10.7%15.8%-32.2%
Avg. Travel Time33.2 min34.6 min-4.2%

How Chester County compares

Chester County against nearby counties

Against the 4 nearest areas, Chester County is 23.4% less congested; it has the fourth busiest roads of the five. Less traffic and more room for it - the roads here run both quieter and freer than the areas around them.

Chester 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
Chester County5,4527.9%9,883,32433.2 min15.7%
Delaware County, Pennsylvania9,4826.2%6,862,36035.7 min25.2%
Montgomery County, Pennsylvania9,5247.3%14,288,06435.4 min24.6%
Lancaster County, Pennsylvania5,7469.4%9,484,67835.7 min17.1%
Berks County, Pennsylvania5,16111.3%7,812,77334.1 min15.3%
Pennsylvania average5,61710.6%N/A34.6 min16.5%

Chester County ranked within Pennsylvania

No other county-level area in Pennsylvania records a higher average driver income than Chester County.

Chester County ranked among 67 county-level areas in Pennsylvania (1 = highest); measures without data in every county rank a smaller field, down to 64.
MeasureChester CountyPennsylvania rank
Traffic volume (AADT)5,452#14 of 67
Highway vehicle-miles per day4,709,450#4 of 64
Truck share on highways10.7%#55 of 64
Highway trucks per day1,698#31 of 64
Average travel time33.2 min#41 of 67
Average driver income$134,205#1 of 67
Average driver age47.4 yrs#62 of 67

The two ends of this table sit far apart: #1 of 67 on average driver income, against #62 of 67 on average driver age.

Busiest roads in Chester County, Pennsylvania

On their busiest stretches, the three busiest roads in Chester County carry 61,448 vehicles a day on average, 11.3 times the typical road in the county (5,452).

County Line Expressway leads with 81,512 vehicles a day, 5,414 of them trucks (6.6%). Pennsylvania Turnpike carries the most trucks, 8,592 a day (22.4% of its traffic), although it is not among the 5 busiest roads overall.

Freight stands out on Pennsylvania Turnpike: trucks are 22.4% of the traffic there, against 7.9% county-wide.

Pennsylvania Turnpike carries longer journeys than most roads here, with a median trip of 67.1 minutes against 33.2 county-wide.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1County Line ExpresswayMotorway · 81,512vehicles5,414trucks · 6.6%
Road class
Motorway
Congestion ratio
99.3%
Median trip time
42.0 min
Drivers’ median age
47.1 yrs
Drivers’ average income
$133,650

County Line Expressway is one of the more congested roads here: trips take 99% longer than at free-flow speed, against 16% county-wide.

2Chester BypassMotorway · 57,487vehicles3,591trucks · 6.2%
Road class
Motorway
Congestion ratio
57.0%
Median trip time
39.2 min
Drivers’ median age
47.7 yrs
Drivers’ average income
$128,546

Delays build on Chester Bypass: its congestion ratio of 57% over free-flow time is well above the county's 16%.

3Exton BypassMotorway · 45,346vehicles3,682trucks · 8.1%
Road class
Motorway
Congestion ratio
43.0%
Median trip time
41.9 min
Drivers’ median age
46.8 yrs
Drivers’ average income
$125,224

A main artery: Exton Bypass's busiest stretch carries 8.3 times the county average; trucks are 8.1% of it, in line with the county-wide 7.9%.

4US 202Motorway · 41,985vehicles3,040trucks · 7.2%
Road class
Motorway
Congestion ratio
50.6%
Median trip time
39.8 min
Drivers’ median age
46.9 yrs
Drivers’ average income
$141,206

US 202 is a trunk route for the county, carrying 7.7 times the county average on its busiest stretch; trucks are 7.2% of it, below the county-wide 7.9%.

5Dekalb PikeMotorway · 38,752vehicles3,060trucks · 7.9%
Road class
Motorway
Congestion ratio
49.9%
Median trip time
46.9 min
Drivers’ median age
46.8 yrs
Drivers’ average income
$145,574

Drivers on Dekalb Pike are on long journeys, a median 46.9 minutes against 33.2 county-wide: a through route more than a local street.

Ranked by trucks per day

Cars and light vehiclesTrucks
1Pennsylvania TurnpikeMotorway · 38,287vehicles8,592trucks · 22.4%
Road class
Motorway
Congestion ratio
41.9%
Median trip time
67.1 min
Drivers’ median age
47.6 yrs
Drivers’ average income
$134,070

Pennsylvania Turnpike carries 7.0 times the county average at its busiest, 8,592 of them trucks (22.4%, above the county-wide 7.9%).

2County Line ExpresswayMotorway · #1 by traffic81,512vehicles5,414trucks · 6.6%
3Exton BypassMotorway · #3 by traffic45,346vehicles3,682trucks · 8.1%
4Chester BypassMotorway · #2 by traffic57,487vehicles3,591trucks · 6.2%
5Dekalb PikeMotorway · #5 by traffic38,752vehicles3,060trucks · 7.9%
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

ChesterDepartment 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 Chester County

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

Need segment-level traffic data?

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