What if you worked farther away?

I've interviewed at companies that were 30 minutes to an hour away by car. I've had the good fortune to find employment within 6 miles of my house. By car it is 15 minutes, desk to door. By bike, it is 45 minutes if I change clothes (which is most of the time), or it could be closer to 30 minutes if I just jump on the bike. Any time my Wife gets a little frustrated by my reduced spontaneity (because I biked to work), I just remind her of where I could be working.

In a real "emergency?" Plenty of options, as already mentioned. Friends, taxi, etc.