anchor: This may mean departing from the basic line of travel and walking or driving to a delivery point and returning to the basic line of travel, or it may mean slowing down from normal driving speed, stopping to make a delivery to a curbside mail receptacle, and then resuming normal speed.
positive: departing from the basic line of travel and walking or driving may be an implication of the conclusion referenced.
negative: slowing down from normal driving speed does not need to be considered at all.