Boston’s late-winter freeze-thaw swings are driving pothole growth and complicating lasting street repairs

A familiar seasonal pattern is taking a visible toll on Greater Boston roadways

Drivers across Boston and surrounding communities are encountering a surge of potholes as late winter transitions toward early spring, a period marked by repeated temperature swings above and below freezing. The pattern accelerates pavement failure by forcing water to cycle between liquid and ice inside cracks and seams in asphalt and concrete.

When daytime temperatures rise, snow and ice melt and water works into existing fractures. As temperatures drop again overnight, that trapped water freezes and expands, prying the pavement apart. Repeated over many days, the process weakens the road surface until traffic dislodges pieces of asphalt and leaves a cavity. The effect is most pronounced when freeze-thaw conditions occur frequently, rather than during stretches of consistently cold weather.

Snow, plowing, and heavy traffic add stress to already weakened pavement

Winter operations can amplify the damage. Snowplows scrape road surfaces while maneuvering around uneven pavement, and the weight of plow trucks and everyday traffic can exploit weak points created by moisture and frost. Late winter also brings more meltwater as accumulated snowpack thaws, increasing the amount of water available to seep into roadways.

Boston’s Public Works operations acknowledge that winter conditions affect both how quickly crews can respond and the durability of repairs. The city’s standard approach is to use temporary fixes during winter months and shift to permanent repairs when conditions allow in spring.

How Boston residents can report potholes and what to expect next

In Boston, potholes on city-controlled streets can be reported through Boston 311, including by phone, online, and via the BOS:311 mobile app. Public Works indicates that pothole repairs are often completed within two business days, though timing can vary depending on access and conditions. For state-controlled roads, Massachusetts maintains a dedicated pothole hotline.

• Report potholes on Boston streets through 311 or the BOS:311 app.
• For state roads, use the Massachusetts pothole hotline to direct repairs to the appropriate crews.

Claims for damage depend on who maintains the roadway and strict deadlines

Potholes can cause costly damage, including blown tires and bent wheels. For incidents on Boston-controlled streets, the city provides a process to file claims related to injuries or property damage, with many roadway-defect claims requiring notice within 30 days. For state highways, Massachusetts has a separate claims process with different legal limits that can affect what losses are eligible for recovery.

Late winter is typically when freeze-thaw cycles become frequent enough to rapidly expand small cracks into road hazards, especially as snowmelt increases the water available to infiltrate pavement.

With temperatures expected to continue fluctuating in the region during early March, transportation officials and residents alike are likely to remain in a race between new potholes forming and crews attempting to keep pace until stable, warmer conditions support longer-lasting repairs.