Quote:
Originally Posted by youngniems
Thank you for this explanation. I guess what I do not understand is if trains would hypothetically run 4 times every 60 minutes from Narberth, why could 1 of those trains be the one that goes through Malvern once an hour. Similarly, how Ambler has more frequent trains than say Colmar because the trains that start in Doylestown AND Lansdale run through Ambler. I feel that would save on man power as well so they wouldn't need 2 trains (one from paoli-narberth and narberth-CC)
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It's because they don't have the crews for that. In my hypothetical scenario, You only need one crew for every run from CC to Radnor and back, and then one crew to run from Thorndale to Radnor every hour. Let's say that there are indeed four trains an hour to/from Radnor every hour, so that means 5 crews total.
Compare that to through-running 1 in four of those trains. Once that crew leaves Radnor
and continues heading west, a new crew and trainset has to come from somewhere to replace what would've been their return run from Radnor to CC. So in an hour, you'd need the same amount of crews to run that.
Except that crew that continued out to Thorndale is now... out near Thorndale. No chance they make it back to Radnor before the hour is up. The timetables say it's 48 minutes one way between Radnor and Thorndale. An hour and An hour and 40 minutes has passed before that train can make it back to Radnor. You're going to have to start adding crews to fill in those gaps from Radnor inbound at this point. And it suddenly starts adding up.
Also, under Option 1 the Cynwyd and CHW finally see 30 min headways, which is actually an improvement over the current situation.