tsl, do you think your buddies at BikeJournal CCC would allow me to "bend" their rules to fit my situation? I keep my car at work, and occasionally drive it home at night and back to work in the morning (until Feb, "occasionally" is "weekly", but generally it's monthly or less). Thus for me, a "commuting round-trip" is evening and morning, not morning and evening. I wouldn't want to get dinged two days for a single use of the car, so I would report a full commuting day if I rode home->work some morning, and rode work->home at the end of the previous workday. It's kind of like I "live" at the office (where I have a car), and "work" at home; or have a night-shift job with a whole lotta hours.