speed table
n.— «A second traffic mitigation option would be to install a set of elongated speed humps, what transportation officials refer to as “speed tables,” which would gradually rise up over six feet until it is three inches high. Then drivers would ride straight along the plateau for about 10 feet and then gradually lower back to street level.» —“Speeders irk Phase I residents; ‘Speed tables,’ private security, radar signs are options” by Jill R. Goodman in West Valley, Ariz. Newzap.com Mar. 28, 2005. (source: Double-Tongued Dictionary)