I ride a 2' wide line. I think that the squirrel riding technique causes others to give you plenty of room. Probably the faster that you go the straighter the line would be. I once rode with a guy that would swerve 3' side to side when he started off. He had a severe balance problem caused from a car wreck. I liked riding with the guy because all the cars would pass giving the maximum amount of room.

I have some rollers and there is no way that I can ride them. I am thinking about using my climbing gear so that I can be suspended above the bike and then try the rollers. This way if the bike runs off the rollers I will be left hanging with the bike clipped to my feet.