Originally Posted by Bekologist
there are times the rider will have to do NEITHER of those things, Roody, so it's not entirely accurate.
although it is what a rider should do if necessary.
I know. That's why I said "in some cases." Twice. It's almost impossible to write "maxims" about dynamic processes like traffic movement on real streets. But you can come up with some useful "rules of thumb" or heuristics that cover many situations.
Like==being further left often puts you in a better position to deal with traffic coming from ahead or to the side. But if traffic is overtaking you from the rear, obviously it is often better to be further to the right to deal with that traffic. Thus, some lateral movement within the lane is sometimes required when dealing with ever-changing traffic dynamics. Thus, "dynamic lateral lane positioning". Or you can call it weaving or swerving if you like. I think it's a good way to ride, much of the time. Do you agree?