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Traffic heat map of Sauk County, Wisconsin: 561 miles of roads shaded from blue (light) to red (heavy traffic), busiest on I 90 and Broadway Street

Sauk County, Wisconsin Traffic Counts

Traffic analytics for Sauk County, Wisconsin, calculated from real-world mobile and sensor networks on 6,056 road segments (561 road miles, about 489 ft each). Its busiest road, I 90, carries 38,990 vehicles a day, 10.8 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 icon

Total Traffic Volume & Performance in Sauk County, Wisconsin

Traffic

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

vehicles per day3,594
Trucks

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

13.4%
Average travel time

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

32.6 min
Congestion ratio

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

11.2%
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.

$75,779

A typical monitored road in Sauk County, Wisconsin sees 3,594 vehicles per day, while its 561 miles of monitored roads together handle 1,926,837 vehicle-miles traveled per day (≈703 million per year). At 13.4%, the truck share runs above the 10.2% across Wisconsin: about 1 in 7 vehicles.

Busier roads than 79% of counties in Wisconsin

Sauk's average daily traffic volume is 5% lower than the state average - 3,594 vehicles per day against 3,802. In total volume terms, its road network carries about 1.4% of Wisconsin's statewide total of vehicle-miles. Sauk carries more traffic than 79% of counties in Wisconsin.

The average trip takes 32.6 minutes, on par with the state level. Its average travel time of 32.6 minutes is longer than 51% of counties in Wisconsin.

The congestion ratio of 11.2% runs slightly lower than the state level (11% lower) - crucial for traffic control improvement and logistics planning.

Highway vs. Non-Highway Traffic Analysis

highway traffic icon

Highway Traffic in Sauk County, Wisconsin

Trafficvehicles per day11,759
Trucks19.2%
Average travel time46.2 min
Congestion ratio23.6%
Drivers’ average age50.2 yrs
Drivers’ average income$75,916

Highways carry about half of all travel in Sauk County, Wisconsin, 48% of vehicle-miles. The average highway carries 11,759 vehicles per day, 270% more than the average non-highway road in the same area, which carries 3,176 vehicles per day.

Yet highways are only 13% of the road network, 74 miles in 295 segments, so each mile of them is 3.6 times as busy as the average road mile.

That is more highway travel volume than 54% of counties in Wisconsin.

Higher highway truck share than 88% of counties in Wisconsin

The concentration of trucks on highways (19.2%) is 31% 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 88% of counties in Wisconsin. 77% of counties in Wisconsin see fewer highway trucks per day than Sauk's roughly 2,264.

non-highway traffic icon

Non-highway Traffic in Sauk County, Wisconsin

Trafficvehicles per day3,176
Trucks8.0%
Average travel time31.9 min
Congestion ratio10.6%
Drivers’ average age50.3 yrs
Drivers’ average income$75,724

Local roads carry about half of all travel in Sauk County, Wisconsin, 52% of vehicle-miles. The average non-highway road carries 3,176 vehicles per day.

Spread over 486 miles and 5,761 segments, 87% of the road network, local roads carry a lighter load per mile: 1,005,561 vehicle-miles traveled per day (≈367 million per year). Trucks make up 8.0% of non-highway traffic, about 1 in 12 vehicles.

Local roads carry 58% fewer trucks by share than highways

Compared to highways, non-highway routes see 58% fewer trucks by share.

Non-highway congestion (10.6%) runs slightly lower than the state level (13% lower).

55% of counties in Wisconsin see lower average driver income among trip origins than Sauk. The driver population here skews younger than 51% of counties in Wisconsin.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 10:00 AM–12:00 PM and a long afternoon plateau from 3:00 PM to 7:00 PM, with volumes reaching approximately 76% higher than the daily average.
Weekend traffic:
Weekend traffic is about as busy as on weekdays (-0%): leisure and through trips largely replace the commute.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +19% versus the annual average.
Lowest month:
January is the quietest month, with volumes -20% versus the annual average - the usual winter low.

Data Finding: Hourly & Seasonal Patterns

In Sauk County, Wisconsin, the peak hour concentrates about 7% of the day's traffic, and there is a strong seasonal swing of +19% in high season.

Sauk County vs. Wisconsin Traffic Comparison

Sauk County's biggest difference from the Wisconsin average is its truck share, 32% above it. Its highway truck share is also 31% above.

MetricSauk CountyWisconsin averageDifference
Traffic3,5943,802-5.5%
Truck % (Total Traffic)13.4%10.2%+31.8%
Truck % (Highway)19.2%14.7%+31.0%
Avg. Travel Time32.6 min32.2 min+1.4%

How Sauk County compares

Sauk County has the busiest roads among its nearby counties

Against the 4 nearest areas, Sauk County carries 85.2% more traffic on a typical road and is 45.8% 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.

Sauk County and the 4 nearest county-level areas by centroid distance, with the Wisconsin average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Sauk County3,59413.4%1,926,83732.6 min11.2%
Richland County, Wisconsin1,5949.4%290,73331.7 min7.0%
Columbia County, Wisconsin2,68614.6%2,721,46032.2 min8.9%
Adams County, Wisconsin1,8109.0%494,34538.4 min8.0%
Iowa County, Wisconsin1,67210.2%842,61337.5 min6.9%
Wisconsin average3,80210.2%N/A32.2 min12.6%

Sauk County ranked within Wisconsin

Truck share on highways places Sauk County #8 of 58 in Wisconsin - the top quarter of the state.

Sauk County ranked among 72 county-level areas in Wisconsin (1 = highest); measures without data in every county rank a smaller field, down to 58.
MeasureSauk CountyWisconsin rank
Traffic volume (AADT)3,594#16 of 72
Highway vehicle-miles per day921,276#27 of 58
Truck share on highways19.2%#8 of 58
Highway trucks per day2,264#14 of 58
Average travel time32.6 min#36 of 72
Average driver income$75,779#33 of 72
Average driver age50.3 yrs#37 of 72

Busiest roads in Sauk County, Wisconsin

On their busiest stretches, the three busiest roads in Sauk County carry 26,332 vehicles a day on average, 7.3 times the typical road in the county (3,594).

I 90 leads with 38,990 vehicles a day, 9,309 of them trucks (23.9%). That is 92% more than the next road, Broadway Street (20,271). It also carries the most trucks.

I 90 carries longer journeys than most roads here, with a median trip of 54.0 minutes against 32.6 county-wide.

Trucks make up 23.9% of traffic on I 90, against 13.4% across all roads in the county.

Ranked by daily traffic (AADT)

Cars and light vehiclesTrucks
1I 90Motorway · 38,990vehicles9,309trucks · 23.9%
Road class
Motorway
Congestion ratio
39.9%
Median trip time
54.0 min
Drivers’ median age
50.7 yrs
Drivers’ average income
$70,482

I 90 is one of the more congested roads here: trips take 40% longer than at free-flow speed, against 11% county-wide.

2Broadway StreetPrimary road · 20,271vehicles1,847trucks · 9.1%
Road class
Primary road
Congestion ratio
29.6%
Median trip time
35.5 min
Drivers’ median age
50.7 yrs
Drivers’ average income
$65,175

Broadway Street is a trunk route for the county, carrying 5.6 times the county average on its busiest stretch; trucks are 9.1% of it, below the county-wide 13.4%.

3WI 13 / WI 16 / WI 23Primary road · 19,734vehicles1,450trucks · 7.3%
Road class
Primary road
Congestion ratio
30.8%
Median trip time
33.3 min
Drivers’ median age
50.8 yrs
Drivers’ average income
$64,233

WI 13 / WI 16 / WI 23 carries 5.5 times the county average at its busiest, 1,450 of them trucks (7.3%, below the county-wide 13.4%).

4US 12Motorway · 17,958vehicles1,699trucks · 9.5%
Road class
Motorway
Congestion ratio
32.7%
Median trip time
34.6 min
Drivers’ median age
50.1 yrs
Drivers’ average income
$73,547

Delays build on US 12: its congestion ratio of 33% over free-flow time is well above the county's 11%.

5Wisconsin Dells ParkwayPrimary road · 16,893vehicles1,129trucks · 6.7%
Road class
Primary road
Congestion ratio
19.9%
Median trip time
33.5 min
Drivers’ median age
51.3 yrs
Drivers’ average income
$58,106

The busiest stretch of Wisconsin Dells Parkway carries 4.7 times the county average; trucks are 6.7% of it, below the county-wide 13.4%.

Ranked by trucks per day

Cars and light vehiclesTrucks
1I 90Motorway · #1 by traffic38,990vehicles9,309trucks · 23.9%
2Broadway StreetPrimary road · #2 by traffic20,271vehicles1,847trucks · 9.1%
3US 12Motorway · #4 by traffic17,958vehicles1,699trucks · 9.5%
4Phillips BoulevardTrunk road · 16,508vehicles1,462trucks · 8.9%
Road class
Trunk road
Congestion ratio
20.1%
Median trip time
35.1 min
Drivers’ median age
50.0 yrs
Drivers’ average income
$90,722

On its busiest stretch, Phillips Boulevard carries 4.6 times the county average; trucks are 8.9% of it, below the county-wide 13.4%.

5WI 13 / WI 16 / WI 23Primary road · #3 by traffic19,734vehicles1,450trucks · 7.3%
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

SaukDepartment 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 Sauk County

The same traffic breakdown for the areas closest to Sauk County, Wisconsin.

Need segment-level traffic data?

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