I live in a bikey part of the world, and it's one of the reasons I chose to live here. There's a major bicycling artery that dumps itself right into the plant. We have many bike commuters among the engineers. Most people bring their bikes indoors and stash them in their cubicles or in empty cubes nearby, and the employer doesn't say boo. (This is made easier by the dry climate, probably.) My employer provides beater bikes for employees in the factory area. It has an on-plant helmet law and many locations away from the factory are off-limits to bikes, but the former is not enforced except at the gates, and the latter is for good reason.