I'm an urban planning grad student writing a research paper about critical mass. I put together a quick questionnaire that can be located at http://spreadsheets.google.com/viewform?formkey=dDBOVFV2eUduSlYzZHZ... . If you've taken part in critical mass rides in the past, please fill it out and pass it along to your friends, I'm trying to get as broad of a sample as possible
Also, if you have been active in critical mass rides for a while and would be willing to give me a bit more in depth information about your experiences, please email me at jonbarth@umich.edu