Mine is 1.59 on a good day and doesn't vary from that too much. I take a slightly longer route on the bike for safer roads on my 12 mile (each way) ride. Only 2 traffic signals coming in and 3 on my return and one busy road to merge into for a left hand turn.

My average speed is about 20.5 mph on the bike.

I use my commute for training so usually I'm pushing pretty hard.

I have limited time to bike so taking advantage of the time I would otherwise be driving has been a real bonus.