the NEW Ridgeback™ Speed Ramp is designed to reduce vehicle speed and improve safety conditions in residential and commercial areas; effective interlocking system for easy connectivity and maintains stability before and after assembly; increased area of reflectivity compared to traditional styles of speed ramp; innovative approach of using thermoplastic retro-reflective elements with glass beads for improved visibility; the latest high performance polymer technology conforms to requirements of BS EN 1436:2018 and durability requirements of BS EN1824:201; ramp options: 5cm reduce speed to a maximum of 16kph; 7.5cm reduce speed to a maximum of 8kph