I have a neighbor who works in Virginia (on the other side of Washington DC from us), who does a "mixed commute" - he drives his car part way, parks it at his synagogue, and rides his bike in the rest of the way.

Perhaps that would ultimately be an option for you??? You'd just need to (1) make sure your new office is bike-accessible, and (2) find some place where you can safely stash your car for the work day that provides you with a good route. Just a thought...

edit: oh, but I see the roads around the new office aren't that great?
Bummer....Well, maybe there's a sneaky back way in that you've yet to discover.
Just trying to be optimistic here!