frost boil

DCHP-1 (pre-1967)

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a place in a paved road where the pavement has heaved as a result of the expansion of trapped moisture frozen during the cold weather.

Quotations

1955

The worst outbreak of "frost boils" in history was reported today on Manitoba highways. . . .

1959

More layers of pavement will be laid in the spring after expected frost boils are repaired.

1966

We drove around the new town of Fort Fraser . . . the car clawing its way through the frost boils of the new streets.