noun, American English - a strong metal or concrete barrier along the side of a road that prevents vehicles from going off the road
noun - short for Department of Motor Vehicles, a government office in the US where you can get a driver’s license, register a car, and handle other driving-related services
noun - a type of highway interchange with loop-shaped ramps that allow vehicles to change direction without crossing traffic
noun, American English - a road surface made of asphalt
noun, American English - the lane at the side of a motorway or highway where vehicles can stop in case of breakdown or emergency