The phrase "shoulder of the road" refers to the paved or gravelled area beside a road, which is designed for vehicles to pull over in case of an emergency or breakdown. Full definition
The Aveo ended up on the grass shoulder of the road while the Ram hit a utility pole on the side of the road. (hernandoinjuryattorney.com)
Both are allowed to use the full motor vehicle lane, but bicyclists can also ride two abreast or individually on the right - hand shoulder of the road. (bwglaw.com)
The company's proposed Highway Drive Assist System automatically keeps cars in the correct lane and maintains an appropriate distance between vehicles, while the Autonomous Emergency Stop System will sense if the driver is debilitated and then maneuver the car to the shoulder of the road to stop. (entrepreneur.com)