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Traffic heat map of Knox County, Illinois: 463 miles of roads shaded from blue (light) to red (heavy traffic), busiest on Bickerdyke Bridge and I 74

Knox County, Illinois Traffic Counts

TrafficZoom tracks traffic on 463 road miles in Knox County, Illinois, divided into 3,319 segments averaging 737 ft. Its busiest road, Bickerdyke Bridge, carries 17,628 vehicles a day, 6.1 times the average road. Built from cross-verified mobile and road-sensor data, these counts help you size up a retail site, plan logistics routes or assess infrastructure needs.
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 Knox County, Illinois

Traffic

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

vehicles per day2,906
Trucks

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

13.1%
Average travel time

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

33.8 min
Congestion ratio

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

9.7%
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.

$61,916

Our data shows 2,906 vehicles per day on the average road in Knox County, Illinois, and 1,353,672 vehicle-miles traveled per day (≈494 million per year) across its 463 miles of monitored roads. Trucks are 13.1% of traffic, more than the 10.2% across Illinois.

Traffic 66% below the Illinois average

Knox's average daily traffic volume is 66% lower than the state average - 2,906 vehicles per day against 8,480 - suggesting less traffic load per road - quiet roads that suit freight movement more than drive-by retail. Across the whole network, that travel is about 0.6% of Illinois's statewide total. 51% of counties in Illinois see more traffic than Knox's 2,906 vehicles per day.

Journey times here (33.8 minutes on average) closely track the state level. On travel time, Knox runs longer than 51% of counties in Illinois.

The congestion ratio of 9.7% is 53% lower, pointing to smoother traffic flow than the state level - free-flowing roads make scheduled deliveries highly predictable.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Knox County, Illinois

Trafficvehicles per day7,352
Trucks18.9%
Average travel time49.0 min
Congestion ratio18.6%
Drivers’ average age50.6 yrs
Drivers’ average income$67,358

Travel in Knox County, Illinois splits roughly evenly, with about half of it (54% of vehicle-miles) on highways. The average highway carries 7,352 vehicles per day, 169% more than the average non-highway road in the same area, which carries 2,732 vehicles per day.

With 21% of the road miles (95 miles in 125 segments), highways punch above their length, carrying 730,643 vehicle-miles traveled per day (≈267 million per year).

That is more highway travel volume than 67% of counties in Illinois.

A typical mix of freight and passenger traffic

At 18.9%, highway truck share is 9% higher than the state average. The highway traffic mix is typical for Illinois: neither freight- nor commuter-dominated.

By truck concentration, highways here trail 57% of counties in Illinois. By raw truck volume, Knox carries fewer highway trucks than 62% of counties in Illinois.

non-highway traffic icon

Non-highway Traffic in Knox County, Illinois

Trafficvehicles per day2,732
Trucks6.4%
Average travel time33.2 min
Congestion ratio9.4%
Drivers’ average age50.2 yrs
Drivers’ average income$59,522

Travel in Knox County, Illinois splits roughly evenly, with about half of it (46% of vehicle-miles) on local roads. On the average non-highway road, that comes to 2,732 vehicles per day.

Local roads make up 79% of the monitored road miles (368 miles in 3,194 segments) but carry less than their share of travel: 623,029 vehicle-miles traveled per day (≈227 million per year). The truck share on non-highway roads is 6.4%.

Drivers from lower-income areas than 85% of counties in Illinois

Non-highway roads carry a truck concentration that's 66% lower than the highway network.

Non-highway congestion (9.4%) runs 54% lower than the state average, pointing to smoother local traffic flow.

Trip origins here have lower average income than 85% of counties in Illinois. The driver population here skews older than 67% of counties in Illinois.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

In Knox County, Illinois, the peak hour concentrates about 7% of the day's traffic.

Knox County vs. Illinois Traffic Comparison

The average daily traffic per road sets Knox County apart: 66% below the Illinois average. Its truck share, by contrast, is 29% above.

MetricKnox CountyIllinois averageDifference
Traffic2,9068,480-65.7%
Truck % (Total Traffic)13.1%10.2%+29.1%
Truck % (Highway)18.9%17.3%+9.1%
Avg. Travel Time33.8 min34.1 min-1.1%

How Knox County compares

Knox County has a higher truck share than any nearby county

Knox County tracks the 4 areas around it closely - no measure in this table sets it far apart from the areas immediately next to it, though it has the second busiest roads of the five. Traffic volume here matches the areas around it, but more of that traffic is trucks - a difference in what routes through, not in how much.

Knox County and the 4 nearest county-level areas by centroid distance, with the Illinois average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Knox County2,90613.1%1,353,67233.8 min9.7%
Warren County, Illinois1,79311.6%500,34232.4 min6.7%
Peoria County, Illinois5,7447.3%3,763,20334.0 min16.8%
Stark County, Illinois1,2498.9%123,74736.7 min4.3%
Fulton County, Illinois2,3137.8%596,75534.2 min7.7%
Illinois average8,48010.2%N/A34.1 min20.6%

Knox County ranked within Illinois

Knox County sits in the bottom quarter of the Illinois field on average driver income, at #87 of 102.

Knox County ranked among 102 county-level areas in Illinois (1 = highest); measures without data in every county rank a smaller field, down to 82.
MeasureKnox CountyIllinois rank
Traffic volume (AADT)2,906#53 of 102
Highway vehicle-miles per day730,643#28 of 82
Truck share on highways18.9%#47 of 82
Highway trucks per day1,390#51 of 82
Average travel time33.8 min#50 of 102
Average driver income$61,916#87 of 102
Average driver age50.3 yrs#34 of 102

Busiest roads in Knox County, Illinois

The three busiest roads in Knox County average 16,122 vehicles a day, 5.5 times the county average of 2,906 across all its monitored roads.

Bickerdyke Bridge is the busiest road, at 17,628 vehicles a day, 853 of them trucks (4.8%). I 74 is practically level with it at 17,170. I 74 carries the most trucks, 3,395 a day (19.8% of its traffic), although it ranks #2 for all traffic.

I 74 carries longer journeys than most roads here, with a median trip of 53.4 minutes against 33.8 county-wide.

Few trucks use Bickerdyke Bridge: 4.8% of its traffic, under half the county's 13.1%.

Bickerdyke Bridge draws drivers from lower-income areas: their neighborhoods average $44,320 in household income, 28% below the county's $61,916.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1Bickerdyke BridgeSecondary road · 17,628vehicles853trucks · 4.8%
Road class
Secondary road
Congestion ratio
40.0%
Median trip time
49.3 min
Drivers’ median age
49.9 yrs
Drivers’ average income
$44,320

Travel on Bickerdyke Bridge's busiest stretch runs 40% over free-flow time, against 10% across the county, so expect slower peak hours.

2I 74Motorway · 17,170vehicles3,395trucks · 19.8%
Road class
Motorway
Congestion ratio
19.7%
Median trip time
53.4 min
Drivers’ median age
51.0 yrs
Drivers’ average income
$69,889

I 74 leans on freight: 3,395 trucks a day, 19.8% of its traffic against 13.1% county-wide.

3Chicago-Kansas City ExpresswayMotorway · 13,568vehicles2,449trucks · 18.1%
Road class
Motorway
Congestion ratio
16.6%
Median trip time
42.7 min
Drivers’ median age
50.0 yrs
Drivers’ average income
$65,472

On its busiest stretch, Chicago-Kansas City Expressway carries 4.7 times the county average; trucks are 18.1% of it, above the county-wide 13.1%.

4Henderson StreetPrimary road · 12,787vehicles566trucks · 4.4%
Road class
Primary road
Congestion ratio
16.7%
Median trip time
32.2 min
Drivers’ median age
49.9 yrs
Drivers’ average income
$54,541

Henderson Street peaks at 12,787 vehicles a day, 4.4 times the county average; trucks are 4.4% of it, below the county-wide 13.1%.

5Seminary StreetSecondary road · 9,979vehicles381trucks · 3.8%
Road class
Secondary road
Congestion ratio
23.1%
Median trip time
31.9 min
Drivers’ median age
50.0 yrs
Drivers’ average income
$55,507

Seminary Street is one of the more congested roads here: trips take 23% longer than at free-flow speed, against 10% county-wide.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 74Motorway · #2 by traffic17,170vehicles3,395trucks · 19.8%
2Chicago-Kansas City ExpresswayMotorway · #3 by traffic13,568vehicles2,449trucks · 18.1%
3Bickerdyke BridgeSecondary road · #1 by traffic17,628vehicles853trucks · 4.8%
4US 34Motorway · 7,624vehicles662trucks · 8.7%
Road class
Motorway
Congestion ratio
18.7%
Median trip time
30.5 min
Drivers’ median age
50.2 yrs
Drivers’ average income
$64,695

US 34 carries 2.6 times the county average at its busiest, 662 of them trucks (8.7%, below the county-wide 13.1%).

5Henderson StreetPrimary road · #4 by traffic12,787vehicles566trucks · 4.4%
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

KnoxDepartment 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 Knox County

The same traffic breakdown for the areas closest to Knox County, Illinois.

Need segment-level traffic data?

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