rule of the road


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rule of the road

n. often pl. rules of the road
1. A set of customary practices, especially for the operation of a motor vehicle, boat, or aircraft, established to promote efficiency and safety.
2. A set of established rules or practices, usually unstated, intended to minimize confusion or conflict: "Great powers ... wishing to avoid war could resort to one of three tools: condominium, spheres of influence or rules of the road" (Charles William Maynes).
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References in classic literature ?
EMERGENCY--There is only one rule of the road in air, earth, and water.
Each rule of the road is narrated and illustrated, with animations and video, and there is a section on the Green Cross Code to encourage youngsters to cross the road safely.