Car by far, about 25-35 minutes if traffic is "normal" and there are no accidents. My bike route is 2 miles longer (22.5 miles) and takes me 1:30-40. My best time(today!) was 1:27. I'm still pretty slow though so I think I'll be able to get it down into the 1:15 range over the next few months. Assuming decent weather of course.