A. These are also known as wheelstops, parking blocks or parking stops. These are the small barriers mounted at the end of a parking spot to keep a car from getting too close to a sidewalk or a wall. Typically made from concrete, recycled rubber or recycled plastic, wheelstops are generally 6’ long, 6” to 9” wide and 4” to 5” high. They are usually placed about 18” from the curb – but check your local building codes for detailed wheelstop specifications. Shorter or smaller wheelstops provide a lower profile and can help reduce tripping hazards. A six-foot wide wheelstop can be covered by the width of a car (a car is typically 6’ to 6.5’ wide).