From Facing Couples. Pass Thru; As Couples 1/4 toward the given direction.
A Travel Thru is a Travel Right. Also Travel Left/In/Out.
At one point I thought this would be a useful extension
of Travel Thru (particularly since Left Travel Thru has historically
been defined as a Right-shoulder Pass Thru then As Couples 1/4 Left).
I no longer use this, and will probably remove it at some point from