Is there really a need for bus turn lanes at these exits though? Taking Klumpp Road as an example, are there that many services that travel northbound up the busway that exit the busway here? I can think of just one route off the top of my head (116). The vast majority of buses are heading southbound and turn off to the left, not requiring a turning lane.
Similar question for Birdwood Road. Aren’t all the buses exiting here heading southbound?
The one at Garden City you may have a point with. Although that point may have been stronger prior to the BNBN, with the buses from Logan that terminated here (now extended to the Griffith turnaround). As it is now, are there any in service buses that still exit the busway to service the interchange? Even if not, perhaps it might still be worthwhile for out of service buses returning to the depot?