Outdoor channels speed hump bump by hiphen solutions ltd (1)they are very easy for bicycles to cross if designed appropriately. (2)its modular design makes it very easy to install. (3)available in yelllow and black combination for greater visibility. (4)uv, moisture and temperature resistant. (5)modular design provides flexibility to suit any size of road. (6)reflectors and glass elements provides better night visibility. (7)speed bumps are grooved for drainage of the rain water.