I am relatively inexperienced and riding on the busy roads around here at rush hour makes me nervous. Most of my riding is on trails. So yes, I do it often. I used to keep a rack on the trunk of my car, now I just take the front wheel off, put the bike and the wheel in the back of my hatchback with the seats lowered, and drive over to the trails. I start doing pleasant riding a lot faster than if I have to ride there fearing for my life the whole time...