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Traffic heat map of Spencer County, Indiana: 265 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 64 and SR 66

Spencer County, Indiana Traffic Counts

How busy are the roads of Spencer County, Indiana? We measure 265 road miles, divided into 3,324 segments, with multi-sourced, cross-verified mobile and sensor data. Its busiest road, I 64, carries 16,054 vehicles a day, 7.1 times the average road. The breakdown below covers volume, trucks, congestion and driver profiles for retailers, logistics planners and engineers.
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 Spencer County, Indiana

Traffic

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

vehicles per day2,249
Trucks

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

14.5%
Average travel time

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

34.9 min
Congestion ratio

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

8.0%
Drivers’ average age

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

48.8 yrs
Drivers’ average income

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

$76,693

A typical monitored road in Spencer County, Indiana sees 2,249 vehicles per day, while its 265 miles of monitored roads together handle 734,766 vehicle-miles traveled per day (≈268 million per year). Trucks are 14.5% of traffic, more than the 12.1% across Indiana.

Quieter roads than 87% of counties in Indiana

Spencer's average daily traffic volume is 61% lower than the state average - 2,249 vehicles per day against 5,704 - suggesting less traffic load per road - quiet roads that suit freight movement more than drive-by retail. In total volume terms, its road network carries about 0.5% of Indiana's statewide total of vehicle-miles. By volume, Spencer's 2,249 vehicles per day trails 87% of counties in Indiana.

At 34.9 minutes, the average travel time matches the state level closely. 70% of counties in Indiana have a shorter average travel time than Spencer's 34.9 minutes.

Congestion runs 49% lower than the state level, at a ratio of 8.0%, which means smoother traffic flow - fewer delays make delivery windows more reliable.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Spencer County, Indiana

Trafficvehicles per day6,306
Trucks18.5%
Average travel time41.0 min
Congestion ratio17.0%
Drivers’ average age48.2 yrs
Drivers’ average income$76,185

A little more than half of the driving in Spencer County, Indiana happens on highways: 60% of all vehicle-miles. The average highway carries 6,306 vehicles per day, 256% more than the average non-highway road in the same area, which carries 1,770 vehicles per day.

With 32% of the road miles (85 miles in 351 segments), highways punch above their length, carrying 442,060 vehicle-miles traveled per day (≈161 million per year).

Fewer highway trucks than 79% of counties in Indiana

Highway truck concentration here runs 5% lower than the state average, at 18.5%. The highway traffic mix is typical for Indiana: neither freight- nor commuter-dominated.

By truck concentration, highways here trail 57% of counties in Indiana. 79% of counties in Indiana see more highway trucks per day than Spencer's roughly 1,167.

non-highway traffic icon

Non-highway Traffic in Spencer County, Indiana

Trafficvehicles per day1,770
Trucks8.5%
Average travel time34.2 min
Congestion ratio7.0%
Drivers’ average age49.5 yrs
Drivers’ average income$77,213

Local roads carry a significant share of travel in Spencer County, Indiana: 40% of all vehicle-miles. A typical local road sees 1,770 vehicles per day.

Local roads make up 68% of the monitored road miles (180 miles in 2,973 segments) but carry less than their share of travel: 292,705 vehicle-miles traveled per day (≈107 million per year). About 1 in 12 vehicles on non-highway roads is a truck (8.5%).

Local congestion 54% below the Indiana average

The concentration of trucks on non-highway roads is 54% lower than on highways.

Non-highway congestion (7.0%) runs 54% lower than the state average, pointing to smoother local traffic flow.

Trip origins here have higher average income than 65% of counties in Indiana. 65% of counties in Indiana have a younger driver population than Spencer.

Time-of-Day & Seasonal Patterns

Data Finding: Hourly & Seasonal Patterns

In Spencer County, Indiana, the peak hour concentrates about 8% of the day's traffic.

Spencer County vs. Indiana Traffic Comparison

Of the four measures, average daily traffic per road differs most: Spencer County runs 61% below the Indiana average. Its truck share, by contrast, is 20% above.

MetricSpencer CountyIndiana averageDifference
Traffic2,2495,704-60.6%
Truck % (Total Traffic)14.5%12.1%+20.1%
Truck % (Highway)18.5%19.6%-5.5%
Avg. Travel Time34.9 min33.5 min+4.2%

How Spencer County compares

Spencer County against nearby counties

Set against the average of the 4 areas nearest to it, Spencer County is 34.0% less congested and carries 30.7% less traffic on a typical road; it has the fourth busiest roads of the five. Quiet roads and long journeys - a rural pattern, where the distance between destinations rather than the traffic on the way is what takes the time.

Spencer County and the 4 nearest county-level areas by centroid distance, with the Indiana average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Spencer County2,24914.5%734,76634.9 min8.0%
Warrick County, Indiana3,80611.0%1,556,66529.2 min11.8%
Daviess County, Kentucky5,0088.1%1,814,50633.2 min17.8%
Hancock County, Kentucky1,7619.3%238,24629.5 min6.8%
Perry County, Indiana2,40416.4%496,98334.2 min12.2%
Indiana average5,70412.1%N/A33.5 min15.6%

Spencer County ranked within Indiana

Spencer County sits in the bottom quarter of the Indiana field on average daily traffic volume, at #80 of 92.

Spencer County ranked among 92 county-level areas in Indiana (1 = highest); measures without data in every county rank a smaller field, down to 79.
MeasureSpencer CountyIndiana rank
Traffic volume (AADT)2,249#80 of 92
Highway vehicle-miles per day442,060#48 of 79
Truck share on highways18.5%#45 of 79
Highway trucks per day1,167#63 of 79
Average travel time34.9 min#27 of 92
Average driver income$76,693#33 of 92
Average driver age48.8 yrs#33 of 92

Busiest roads in Spencer County, Indiana

The three busiest roads in Spencer County average 11,619 vehicles a day, 5.2 times the county average of 2,249 across all its monitored roads.

I 64 leads with 16,054 vehicles a day, 4,298 of them trucks (26.8%). It also carries the most trucks.

I 64 carries longer journeys than most roads here, with a median trip of 66.5 minutes against 34.9 county-wide.

Trucks make up 26.8% of traffic on I 64, against 14.5% across all roads in the county.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 64Motorway · 16,054vehicles4,298trucks · 26.8%
Road class
Motorway
Congestion ratio
15.8%
Median trip time
66.5 min
Drivers’ median age
48.6 yrs
Drivers’ average income
$85,100

A main artery: I 64's busiest stretch carries 7.1 times the county average; trucks are 26.8% of it, above the county-wide 14.5%.

2SR 66Trunk road · 11,433vehicles1,351trucks · 11.8%
Road class
Trunk road
Congestion ratio
28.0%
Median trip time
36.2 min
Drivers’ median age
48.3 yrs
Drivers’ average income
$73,438

Delays build on SR 66: its congestion ratio of 28% over free-flow time is well above the county's 8%.

3SR 161Primary road · 7,370vehicles645trucks · 8.8%
Road class
Primary road
Congestion ratio
19.6%
Median trip time
37.3 min
Drivers’ median age
48.6 yrs
Drivers’ average income
$73,059

Travel on SR 161's busiest stretch runs 20% over free-flow time, against 8% across the county, so expect slower peak hours.

4Sycamore StreetTrunk road · 6,199vehicles658trucks · 10.6%
Road class
Trunk road
Congestion ratio
14.6%
Median trip time
38.6 min
Drivers’ median age
49.5 yrs
Drivers’ average income
$64,138

On its busiest stretch, Sycamore Street carries 2.8 times the county average; trucks are 10.6% of it, below the county-wide 14.5%.

5US 231Trunk road · 6,002vehicles808trucks · 13.4%
Road class
Trunk road
Congestion ratio
8.5%
Median trip time
43.4 min
Drivers’ median age
48.9 yrs
Drivers’ average income
$80,725

US 231 peaks at 6,002 vehicles a day, 2.7 times the county average; trucks are 13.4% of it, below the county-wide 14.5%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 64Motorway · #1 by traffic16,054vehicles4,298trucks · 26.8%
2SR 66Trunk road · #2 by traffic11,433vehicles1,351trucks · 11.8%
3County Road 100Trunk road · 5,843vehicles877trucks · 15.0%
Road class
Trunk road
Congestion ratio
6.9%
Median trip time
42.0 min
Drivers’ median age
49.3 yrs
Drivers’ average income
$73,849

County Road 100 carries 2.6 times the county average at its busiest, 877 of them trucks (15.0%, in line with the county-wide 14.5%).

4US 231Trunk road · #5 by traffic6,002vehicles808trucks · 13.4%
5William H. Natcher BridgeTrunk road · 4,856vehicles752trucks · 15.5%
Road class
Trunk road
Median trip time
49.1 min
Drivers’ median age
46.9 yrs
Drivers’ average income
$79,284

Drivers on William H. Natcher Bridge are on long journeys, a median 49.1 minutes against 34.9 county-wide: a through route more than a local street.

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

SpencerDepartment 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 Spencer County

The same traffic breakdown for the areas closest to Spencer County, Indiana.

Need segment-level traffic data?

Identify traffic patterns street by street and analyze the exact corridors that matter to your project.