I run and cycle. When I run, I figure it's easier for me to move over to a sidewalk or gravel (on the side of the MUT) than the cyclist. While there is usually plenty of room, I always try to make it so they don't have to swerve around me. That's to say when I know they're there, of course.

What irks me as a cyclist are the runners wearing ipods or other devices to impair their hearing. Most runners are really great about staying over and I always try to say hi or "on your left" or whatever's required but there are many who don't even hear me.

I do have to say when I run, cyclists are not always polite. There are elitist ones and I understand what the runners are talking about. It isn't ALL of us, of course, and it's a shame that a few cyclists give us a bad name.

I haven't had bad interactions with runners and dogs but how's about roller-bladers and dogs