I rarely can average more then 14 MPH on my hilly commute, and it always takes me over an hour. So I'm always pushing it so I can either get to work and have time to clean up (or because I left too late) and also going home so I'm not too late getting home. Even so on days I ride, I'm gone from the house a solid 12 hours (6 AM to 6 PM) which is annoying sometimes.