What causes potholes?

Potholes occur as the result of melting ice and snow. The melting water drains under the pavement through cracks caused by traffic. As the temperatures begin freezing at night, the water becomes ice and expands under the pavement, forcing the pavement to lift. As traffic continues to drive over this section of road and the temperatures rise above freezing, a shallow divot occurs under the road and the pavement breaks. A pothole is formed as a result.

Show All Answers

1. When do I need to get a permit from the Road Department?
2. Why isn't my road plowed right away when it snows?
3. Where can I get information on current road conditions in Michigan?
4. Why are some roads numbered differently than others?
5. Who is responsible for State highways in Berrien County?
6. What are "Seasonal weight restrictions" and "Frost laws"?
7. How do you handle Gravel Roads (dust, holes, ruts, etc.)?
8. What causes potholes?
9. Where does the Road Department get its operating funds?
10. What are the rules and policies concerning winter weather conditions?