This blogger has some interesting comments.
Sharrow bicycle lane marking on Kansas Ave. NW at Blair Road (northeast corner)
Originally uploaded by rllayman
I think that within closed communities, like UMD, sharrows signal a commitment to bicycle traffic. We already have low speed limits many casual cyclists can keep up with traffic on declines. We have a great bike shop for even major repairs. But with the gridlock at class change it seems like every needs a little bit more guidance about how to safely move around campus…cars, bikes, pedestrians, everyone. Sharing the road is a start.