... 250 × 350 × 50mm (L * W * H) ends: 170 × 350 × 50mm (L * W * H)deceleration zone, also known as speed brakes, slowing arch ... , buffer strips, speed bumps, slow plastic, ... rubber deceleration road humps, rubber speed hump, rubber buffer, rubber speed bump, road speed hump, road rubber speed hump, road humps, rubber ...