Pavement Conditions in Southeast Michigan: SEMCOG Maps Now Include 2025 Data

Over the last decade, the health of Southeast Michigan’s paved federal aid road network has steadily improved. The region’s pavement condition held steady after the release of the new 2025 pavement assessments. Pavement condition changes continue to show very slight improvements in the last rating period.  

A high-quality transportation network has numerous benefits for all road users, including safe and efficient travel. Increased investment, guided by sound data and asset management principles, has been crucial to this improvement. With strategic planning and data-driven decision-making, regional partners have maintained the condition of roads.  

This strategy prioritizes maintaining roads and preventing them from falling into “poor” condition, because they are more costly to repair at that point. Rehabilitation of pavements in fair condition improves pavement condition in a cost-effective way while preventive maintenance on “good” pavements can economically extend the pavement life.  

Asset management starts with an accurate assessment of existing infrastructure. In partnership with county road agencies and others, SEMCOG works to evaluate the condition of major roads in Southeast Michigan. This means we collect and document pavement condition data for all lane miles eligible for federal funds.  

SEMCOG uses the Pavement Surface Evaluation and Rating (PASER) method to evaluate roads, which are rated and categorized into good, fair, and poor conditions (examples are shown below in Figure 1). Major roads are rated in a two-year cycle, so the latest road conditions are from 2024 and 2025, based on guidance from the Michigan Transportation Asset Management Council (TAMC). 

Examples of good, fair, and poor roads can be seen in Figure 1 below along with examples of the work/costs associated with roads in each condition. An important part of asset management is preventing roads from reaching poor condition, at which point repairs are the most costly. 

Figure 1

Southeast Michigan Pavement Condition

During the 2024-2025 rating cycle, 20,962 lane miles of federal aid roads in Southeast Michigan were evaluated using the PASER method. Roads in good condition have shown a steady increase over the last 10 years. Data in Figure 2 shows that approximately 25% of roads are in good condition compared to 19% in 2016-2017. Roads in poor condition continue to trend downward, as 2024-2025 data show 28% of lane miles are in poor condition, 2,515 fewer lane miles compared to 41% in 2016-2017. 

Figure 2

Southeast Michigan Pavement Condition by Jurisdiction

Breaking down pavement conditions by jurisdiction, including Michigan Department of Transportation (MDOT), counties, cities and villages, MDOT roads are generally in better condition than locally owned roads. In 2024-2025, paved city and village roads an increase of lane miles in good condition, at 15% compared to 11% in 2016-2017 (shown in Figure 3). All road owners are experiencing increased pavement lane miles in poor condition (figure 4).

Figure 3

Figure 4

The updated road condition information is available at SEMCOG’s Pavement Condition map. The map has a variety of filters to find the ratings by year, community, or jurisdiction, among other factors. Data can be downloaded in Excel for individual counties or cities.

View SEMCOG’s Pavement Condition Map with updated 2025 data

SEMCOG’s Bridge Condition map is also available. Just like the pavement map, the bridge map offers a variety of filters and the data can be downloaded in Excel.

View SEMCOG’s Bridge Condition Map

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