rule of the road

See synonyms for rule of the road on
  1. any of the regulations concerning the safe handling of vessels under way with respect to one another, imposed by a government on ships in its own waters or upon its own ships on the high seas.

Origin of rule of the road

First recorded in 1870–75

Words Nearby rule of the road Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023