Bott's dots
noun[plural]
USuk/ˌbɒts ˈdɒts/us/ˌbɑːts ˈdɑːts/smallroundraisedpiecesofplasticormetalplacedalong thelineson thesurfaceof alargeroadtohelpmarkthelanes(=separatestripsofroadforvehiclestodrivealong)or theedgeof theroad
圆形道钉，圆形路标石（大型道路上的圆形塑料或金属凸起，用以标示行车线或道路边缘）
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Road surfaces & features
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