Same rules apply! Edge of the road is total death. People driving in the lane and people opening car doors cannot see you as well. Not to mention stuff like people walking to the car doors, people unloading stuff, etc. The edge of the road just gives you so much less time to react to bad situations.

I've had people even throw their passenger door open in heavy traffic, where I almost flossed their door off, had I not swerved. And that was car to car!