I got done with my dentist's appointment earlier than I had originally guessed, so I took the extra few minutes to drive the remaining four miles to my house, and then marked the time, and drove back to campus. It took 28 minutes from driveway to parking spot in 10am traffic. 9am or 8am traffic won't be the same, but it probably won't add more than about 10 minutes, 15 on a bad day. I can live with that. It's 30 minutes to work from Mountain View on average. Even though the miles are further, the journey is much better.