Speed humps are raised devices, parabolic in shape, placed across the road to slow traffic. The sloped design over a 7 or 14 foot length of space encourages cars to slow down without coming to a halt. Often considered the most traditional physical traffic calming solutions, speed humps calm traffic more gradually then speed bumps, although less so than speed tables. They are ideal for residential roads and are generally used to bring speeds to between 15-30 km/h. Speed humps should ideally be installed in a series to create ongoing traffic calming. They are best placed mid-intersection on roads with low speed limits. Traffic Logix rubber speed humps are available in heights of 5cm.