Simply, avoid changing lanes while you are inside the R/A, at the same time be defensive to those who might violate that rule.

Prepare yourself and change lanes "Before" you enter the R/A, so that you would not have to change it in the R/A.

There is no rule to many situations, so please yeald to others and be carefull. Example, 2 lane R/A for a 3 Lane road, ...