How does your Bike To Work pledge thing work? I am doing 2 different tracking things this month, one tracks commute plus errands or anything I might have otherwise used a car for (~340 miles for May), the other only tracks trips to *the office* (not dropping kids or anything else, 208 miles for May) (and then there is just plain time on bike, ~500 miles for May)

Last year there was another alternative contest, tracking any (ground) mileage outside of single-occupancy car.