3.5 miles from home to work
Bike: 15-20 minutes depending on light cycle. 25 minutes if bridge goes up.
Walk: Never tried it before, but I can usually walk 4 miles in an hour.
Car: When I had one, it would take 30 minutes. Parking took half of that time.
Bus: 35 minutes, which includes walk to bus stop, wait for bus, get off bus, and walk to office.

Bike wins.