I live about a 20 min drive from work, that's why I use my bicycle.

It's about 15km one way and takes me about 40-45 min. Normally the car takes 15-20 min, but in rush hour traffic it can easily be 30-40 min. So for my office commute the bike isn't even that much slower. And if there has been an accident or something like that, I could easily be stuck on traffic for over an hour. With my bike I get there in 45 min, no matter what. I love the fresh air, the exercise and the feeling of being outside.