Steve,
Here is a Federal government website that provides good information on
a number of traffic calming and ped safety improvements (Greg found
this).  Raised crosswalks and traffic humps are included.  Hope it
helps.  Steve

http://safety.fhwa.dot.gov/saferjourney/library/matrix.htm

Steve Plante
Director Streets & Maintenance
Town of Purcellville
130 East Main St
Purcellville, VA  20132