54, huh...requires just the right timing (wrap-wise) around the timed curve before skipping 155, I assume? The few times I've been lucky enough to ride Concourse Express trains with T/Os that "knew their timers" there were GREAT (if only they all went that fast)! Speaking of that, I have a question: how "fast" do trains typically go bypassing 167 N/B? That, to me, is the slowest stretch of the Conc Exp run (excluding the Yankee game double-switch)...