Parallel parking is a method of parking a vehicle in line with other parked cars. Cars parked in parallel are in one line, parallel to the curb, with the front bumper of each car facing the back bumper of the adjacent one. Parallel parking requires driving the car in reverse gear into the parking space. Roads that facilitate said parking have an extra lane or a large shoulder for parked cars. It is also employed anytime parking facilities are not available—usually in large metropolitan areas where there is a high density of vehicles and few (or restricted) accommodations such as multi-storey car parks.
Parallel parking is considered to be one of the hardest skills for new drivers to learn. Parallel parking allows a vehicle to park in a smaller space than would be true of forward parking. Driving forward into a parking space on the side of a road is typically not possible unless two successive parking spaces are empty. Reversing into the spot via the parallel parking technique allows one to take advantage of a single empty space not much longer than the car (in order to complete the parking within three wheel-turns the parking space would generally need to be about one and a half car-length long).