I agree strongly with people above. Get her to do the commute in the morning rush hour, carrying a school rucksack, a musical instrument and music folder, a swim bag and a lacrosse stick. (use a tennis racket or hockey stick). Lacrosse is a BIG part of the G&L sports curriculum, like LEH. And compulsory even if she has no interest in making the squad.
My dd regularly has a load like this for the ten minute journey on the school bus that leaves just 2 mins away from our house. Even that gets her sighing at 7.45 in the morning. Oh did I mention, school starts at 8.45, but girls often all meet up at 8.15 for a school breakfast, swap homework notes, test each other for vocab test later in the day, weekend chat etc. It's the social part of school day and quite important to my daughter to be in for that from time to time.
On your practice journey, do NOT assist her in any way, in terms of carrying her heavy load, giving up your seat or even pointing her in the right direction of the exit or prompting her where to get off. Think about what her alternative route would be if nothing is going in or out of Richmond station or a.n.other keystone station she would need to use. (has happened to me x 2 recently.)
In fact, follow at 30 paces, so she doesn't have your jolly banter to keep her mind off the stress of the journey.
A similar route is the bain of MY life, carrying just a handbag containing a light Macbook Air and an umbrella! But at least I get paid to do it! And I only make 2 changes, not 3. My journey can take anything from 50 mins to 1hour 50mins, depending on the state of the transport system.
One of my dd's friends has a long, difficult commute, she really pities her. "Poor friend, mummy , she can never join in x or y and her mum has said she cannot go to afterschool club z because she'll miss her travel connections." Don't let your dd be that child.
I wouldn't wish it on an 11 year old.