a longer, flatter version of a speed bump
an undulation in the pavement surface which causes vertical displacement as a vehicle passes
a raised area of roadway that stretches across the road
a raised portion of the street surface that is slightly longer than an average automobile and spans the width of the street
a three to four inch raised area in the roadway pavement surface extending traversely across the travel way
A speed hump (sometimes colloqially called a speed bump) is a rounded traffic calming device used to address issues of excessive vehicle speed and volume on residential streets. Humps are placed across the road to slow traffic and are often installed in a series of several humps in order to prevent cars from speeding before and after the hump. Common speed hump shapes are parabolic, circular, and sinusoidal.