This page delivers traffic analytics for Washtenaw County, Michigan. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Washtenaw County, Michigan among 897 road miles divided in 28,467 segments. Our metrics go beyond simple volume counts to provide actionable insights on traffic intensity, congestion, commercial vehicle flow, and network performance with highest possible granularity (average segment length is 166 ft). Whether you are evaluating a new retail location, planning logistics routes, or assessing infrastructure needs, this data helps you move from assumptions to certainty.
Data sourced from TrafficZoom's proprietary analytics platform.
The average number of vehicles that travel each day over any road in the road network.
7,500
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
8.5%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
34.1 min
Congestion ratio
Congestion ratio
The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.
17.5%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
43.2 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$103,424
Our data indicates an estimated average traffic volume of 7,500 vehicles per day in Washtenaw County, Michigan that results in 9,153,084 vehicle-miles traveled per day (≈3.3 billion per year). The traffic stream is comprised of an average of 1 truck for every 12 vehicles. Typical time spent behind the wheel per trip is 34.1 minutes, which already accounts for delays at signals, intersections, and congestion.
Analytical insight
When compared to the Michigan state averages: Washtenaw sees 3% lower average daily traffic volume than the state average (7,500 vehicles per day against 7,697), suggesting less demand on each road - a critical factor for logistics and site planning. In total volume terms, its road network carries 9,153,084 vehicle-miles traveled per day (≈3.3 billion per year), about 4.2% of Michigan's statewide total. At 34.1 minutes, the average travel time is 1% higher than the state level. At 5% lower than the state level, the 17.5% congestion ratio signals smoother traffic flow - crucial for traffic control improvement and logistics planning. Washtenaw carries more traffic than 91% of counties in Michigan. Its average travel time of 34.1 minutes is longer than 59% of counties in Michigan.
Highway vs. Non-Highway Traffic Analysis
Highway Traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
28,935
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
12.5%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
44.7 min
Congestion ratio
Congestion ratio
The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.
55.5%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
45.9 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$103,804
A significant volume of traffic in Washtenaw County, Michigan utilizes the highway network. The average highway carries 28,935 vehicles per day, 311% more than the average non-highway road in the same area, which carries 7,047 vehicles per day. That average covers 155 highway road miles divided in 589 segments (average segment length 1,392 ft), together carrying 4,675,672 vehicle-miles traveled per day (≈1.7 billion per year). That puts Washtenaw among the top 5 counties in Michigan for highway travel volume. Trucks constitute 12.5% of highway traffic.
Analytical insight
The concentration of trucks on highways (12.5%) is 5% higher than the state average for similar road classifications. This indicates Washtenaw serves as a significant freight corridor. For logistics operators, this validates the importance of highway access. 78% of counties in Michigan see a lower highway truck share than Washtenaw's 12.5%. 97% of counties in Michigan see fewer highway trucks per day than Washtenaw's roughly 3,626.
Non-highway traffic
Traffic
Traffic
The average number of vehicles that travel each day over any road in the road network.
7,047
Trucks
Trucks
The percentage of the total traffic volume composed of heavy vehicles.
4.4%
Average travel time
Average travel time
The average time of travel averaged among all vehicles traveling on the road network.
33.9 min
Congestion ratio
Congestion ratio
The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.
16.7%
Drivers’ average age
Drivers’ average age
Average age of residents in the geographic areas where the vehicle trips originated.
41.5 yrs
Drivers’ average income
Drivers’ average income
Average income of residents in the geographic areas where the vehicle trips originated.
$103,215
The non-highway road network in Washtenaw County, Michigan supports a substantial volume of traffic. The average non-highway road carries 7,047 vehicles per day, 76% less than the average highway in the same area, which carries 28,935 vehicles per day. That average covers 742 non-highway road miles divided in 27,878 segments (average segment length 140 ft), together carrying 4,477,412 vehicle-miles traveled per day (≈1.6 billion per year). Trucks constitute 4.4% of non-highway traffic.
Analytical insight
Compared to highways, non-highway routes see 65% fewer trucks by share. At 9% lower than the state level, the non-highway congestion ratio of 16.7% signals easier movement on local roads. Overall, average travel time here is longer than 59% of counties in Michigan. Washtenaw's average driver income exceeds 98% of counties in Michigan. Washtenaw's median driver age is higher than 5% of counties in Michigan.
Time-of-Day & Seasonal Patterns
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 74% higher than the daily average.
Weekend traffic:
Weekend volumes run about 19% below weekday levels.
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +8% versus the annual average.
Lowest month:
January is the quietest month, with volumes -15% versus the annual average.
Analytical insight
In Washtenaw County, Michigan, the peak hour concentrates about 7% of the day's traffic, and seasonal swing is mild at +8% in high season.
Traffic Flow Profile Comparison
Metric
Washtenaw
Michigan
Average
Difference
Traffic
7,500
7,697
-2.6%
Truck % (Total Traffic)
8.5%
7.7%
+10.9%
Truck % (Highway)
12.5%
12.0%
+4.8%
Avg. Travel Time
34.1 min
33.6 min
+1.5%
Frequently Asked Questions
The average daily traffic volume is calculated at 7,500 vehicles per day, providing a baseline for daily operations and site assessment.
Washtenaw's highway truck share of 12.5% is higher than 78% of counties in Michigan.
Trucks account for approximately 8.5% of the total traffic mix across all road types, with a significantly higher concentration of 12.5% on highways.
Weekday peaks occur between 7:00 AM and 9:00 AM in the morning and between 4:00 PM and 6:00 PM in the evening - about 74% above the daily average.
The average travel time for drivers is 34.1 minutes, offering a standard metric for commute and delivery route planning.
Traffic volumes are typically 8% higher during June–August. Volumes drop to their lowest levels in January, averaging 6,393 vehicles per day - a 15% decrease from the annual average.
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)
