The Traffic Engineer for the City of Lakeland [David Uria] has undertaken a survey of Florida municipalities to determine the criteria in use to justify traffic calming meaures. A copy of the results summary is attached.
It’s interesting that they’re generally based on a combination of traffic volume and speeding. There’s general use of a criteria of 85 percentile speeds in the range 5 – 10 mph above the posted speed limits. Traffic volumes vary widely.
The table would be a good starting point for someone drafting traffic calming criteria.
Traffic Calming Blog 
January 9, 2012 at 4:10 am |
The respect of both car driver and pedestrian should be a criteria to choose a good traffic calming measure.Then to compare the speed hump and the speed cushion take a look at this article
http://www.sinoconcept.com/2012/01/06/traffic-calming-measures/