Interestingly (and obviously anecdotal) I've found the opposite has been happening in Philadelphia. And the main driving (no pun intended) factor, I think, was the introduction of our bike share program (Indego). Drivers were so much more hostile to bicyclists before these were introduced.

We now have more dedicated bike lanes, which helps immensely. We've introduced signs and indicators ("sharrows") that indicate to drivers that bicyclists have the right to use the lanes just as much as drivers. It's a noticeable difference from 10 years ago. I can't say for certain these other things would have happened without the introduction of the bike share program, but it seems to be what really changed things here.