After a couple of years in Netherlands I strongly believe that to make the bike a success you obviously need a bike-suitable commute in terms of distance, but also, it needs to be safe. And that boils down to
- infrastructure that is designed for bikes and cars a like. Not some stupid painted lane as an after thought.
- Stringent traffic laws that protect the weaker traffic participant. In Holland for example, the burden of proof is for the more dangerous vehicle in a collision.
For this reason I am not a fan of bike-rental programs. I feel they are easy to implement (dump 20 bikes at train station) and get some political brownie points (see, we do bikes) yet change very little. Redesigning an intersection for safer passage is a whole different matter.
Inspiration? Have a look: http://vimeo.com/29401217
Yes, that is government promo, so here is a random busy intersection in a major city. Note, no helmets, no high vis gear, and all ages are represented. Also, no cars, no door-zone...
~20 min bike commutes shouldn't get you too sweaty unless it's above 85 outside and humid. If it does, lower the pace and catch more of the breeze! For those that need to wear business attire, you'd have to stash your wardrobe at work. But I wouldn't think a shower is a requirement for most, just a bathroom to switch clothes.
As to the no need for showers, it seems a lot more people who think they don't need to shower actually do. I had a cube two rows down from a biker that believed that, but it wasn't so.
The road to better health is paved with sweaty armpits. I for one would not mind a little workplace B.O. if it meant for happier, safer commutes and fewer billions spent treating the pandemic of heart disease and diabetes. But that's just me.