Here is a selection of some useful sites I came across while researching traffic calming. (Click on text.)

1) The Institute of Transportation Engineers (ITE) has a great site for general community traffic calming. http://www.ite.org/traffic/index.html

2) The ITE site has access to thorough text reports on traffic calming. The one I found most useful was Traffic Calming State of Practice by Reid Ewing. http://www.ite.org/traffic/tcstate.htm#tcsop

3) The Transportation Association of Canada www.tac-atc.ca

4) Pennsylvania Department of Transportation. At this site you can download PennDOT's traffic calming handbook. At the search prompt type "traffic calming handbook." http://www.dot.state.pa.us/

5) If you are not from PA, here is a list of all the state departments of transportation.