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 , 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.