45 minutes is kind of an odd scheduling time for that though. If you're going to have to consult a schedule, something like 5, 10, 15, 30, 60 is more appropriate, because it's easier to memorize. "Every 10 minutes on the 4s" for example. Having taken the Lakeshore West GO off-peak quite frequently, it was very nice to not have to check a schedule for the trains, because you just have to remember "Burlington GO, inbound at 14 after the hour". Switching to a 45 min schedule I think would be more of an inconvenience than a convenience. Not that much benefit in terms of actual time saved, but more confusing for riders. 30 minute frequencies though I would completely support.