I am new to this commuting and have had no issues to date. I think a lot would have to do with your route, I am fortunate to be able to drive a short distance to a trail system and ride in on a route where motor vehicle interaction is less likely. I do have a number of street crossings and have generally found drivers down right courteous at these well marked trail crossings.

Where I do have issues is at intersections where I am briefly sharing the road. Specifically with drivers making right hand turns. If I am stopped at the intersection waiting to go straight in the right lane, people wanting to pull a right turn on red seem to get too close for comfort. And the ones wanting to make right turns on red while I have the right of way crossing an intersection have on a couple times pulled right out in front of me, or blocked part of the intersection in front of me. But I would have exactly the same problem as a pedestrian crossing the intersection. I guess the purpose of the white painted lines at intersections, where you are supposed to stop, is lost on some of these folks. But so far this is an annoyance and not a safety issue as long as I remain alert.

Good luck