Virtually all the roads had become impassable.

Signs were removed along with a picnic table, and the condition of the road leading to the monument degraded and became impassable.

It gradually fell out of use and through erosion by the river, became impassable.

Often staircases at the core of the building protected only by sheetrock had become impassable.

This custom is to prevent Jersey's narrow lanes becoming hazardous or impassable through overgrown vegetation.

With many roads becoming impassable, the City of Buffalo police were almost immobile by Friday evening.

The cross country transport network is made up of dirt roads and these quickly become impassable during the rainy season.

Due to the heavy rain the roads had become virtually impassable, greatly restricting the supply of ammunition to the French gun batteries.

This shortage had caused some streets to be closed to traffic, for their surfaces had become impassable, and there was nobody to repair them.

The party instead followed the river until it became impassable, then went west.