Concrete crash barriers and concrete step barriers are passive safety equipment on roads. They prevent vehicles crashing through barriers with the possibly serious consequences in collisions with the oncoming traffic, serve to limit the severity of harm to crashed vehicles and their occupants. They are used as restrictions on the central reservation and roadside or to ensure construction site safety. There is a difference between double-sided and single-sided concrete safety walls. A double-sided concrete safety wall serves as a single row central safety barrier and shows a characteristic profile on both sides. Current profiles are the New Jersey profile and the Step profile.