rule of the road
noun phraseDefinition of rule of the road
: a customary practice (such as driving always on a particular side of the road or yielding the right of way) developed in the interest of safety and often subsequently reinforced by law especially : any of the rules making up a code governing ships in matters relating to mutual safety
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Time Traveler for rule of the road
The first known use of rule of the road was in 1798
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