Traffic-Calming Basics

by Keith K. Knapp, P.E., (M.ASCE), Asst. Prof. and Mgr. of Traffic Engrg. and Traffic Safety Programs; Ctr. for Transp. Res. and Education, Iowa State Univ., Ames, IA,

Serial Information: Civil Engineering—ASCE, 2000, Vol. 70, Issue 1, Pg. 46-49

Document Type: Feature article


The use of traffic calming measures, such as speed humps, traffic circles, and lane narrowings, is becoming more popular in the United States as a way to reduce vehicle speed and traffic volume on selected roadways. Although few national standards have been developed, a number of guidelines have been published that describe the performance of the different traffic calming techniques.

Subject Headings: Traffic management

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