There had been no security patrol over the gravel surface for at least four hours.
The lower terrace, next to the river, has a gravel surface.
Trees cut down to open much of the road's path were used to form the roadbed under the gravel surface.
Larson did as he was told, pulling off the gravel surface.
It was, Steve knew, the gravel surface of the road.
Without another sound he dropped to the gravel surface and lay motionless.
Prior to 2007, the road had a gravel surface.
SH-88 had an entirely gravel surface at that time.
From that point to Barton, the highway had a gravel surface.
The route was improved to a gravel surface by 1946, but would not actually be paved until 1976.