For data collection: Of the 8 faculty (tenured profs) in the Division/Department:

I commute (20km RT) by bike most days
Another (20km RT) by bike
Another (18km RT) by running or bike
Another (18km RT) by bike (50%) of the time
Another cycles and runs extensively but commutes by free bus
Another kayaks/windsurfs into work (lives and works on the same river as do most of us)
Another takes the free bus
Final one drives (and man do we give him crap )