Hi SpyderGirl! Just saw this posted on another forum:
http://dmv.ca.gov/pubs/vctop/d11/vc21714.htm
California specifically banned 3-wheel vehicles from lane-splitting. I've never ridden a Can-Am, so I'm not sure if the width would make lanesplitting a reasonable idea, but the lawmakers took it out of our hands as of 1/1/09.