Its reinforced internal structure enables its limited, temporary performance in case of air pressure loss. This structure allows the tire to be driven on for 50 miles up to 50 mph after air pressure leaves it due to a puncture or other damage. This prevents the vehicle from being stranded on the side of the road, allowing it to safely arrive at a nearby location where the damaged tire can be fixed or changed. Run flat tires are usually made for vehicles with no space for a spare tire.