Bill,
Try this same experience as a small child! That was one of my scariest moments when I was about 5 or 6 years old and experienced the narrow platforms with the crowd of adults behind me. The Cambridge Subway, now the Red line serves a large tourist and shopping district in Boston MA. This line runs from past Harvard Square, near the famous uni, all the way down to Braintree on the south shore, making this the longest line on the system and also the second-most crowded outside of the trams. The famous Park Street station sits on it's namesake street at the corner of Park and Tremont, just inside the gate of the Public Gardens. This is a famous place with the swan boats and Victorian era bridges, and part of the urban greenbelt created by Frank Olmsted in the late 19th-century. This station is a junction between the red, green, and orange lines (via passage tunnel), making it the crossing point for practically the whole system and making it not only busiest but also the most crowded.
Just outside of this area, is a large shopping district called Downtown Crossing. In the old days it was known as Washington Street and it was once full of big department stores. Sadly the areas was urban renewed during the 1970s and the old buildings are long gone, and so are the stores as they merged together and moved to shopping malls. After I visited London, the area reminded me of Oxford Circus and around Harrods while Boston's Washington Street was in its heyday. So now we combine the crossing junction underground of trams and subways lines, plus the shoppers and tourists, kids could get lost or pushed quite easily! Mom used to grip our wrists so tightly, I swear I had finger marks pressed into them as she held on to us for dear life.
To get to Downtown Crossing, one could walk from Park Street or even from Government Center, but with us being small, and her having bags, it meant we would have to go downstairs and I would pray we wouldn't get the middle platform!
What contributed to these crowds was two of the biggest retailers had direct connections to the subway so people could get off the train and head right into the stores without having to climb the escalator! During this time these big retailers had Dollar Days. These were on the first or second Wednesday every month, and in August we would go in for school clothes shopping. The crowds of people! I can't describe the number of shoppers, pressing forward to be the first ones through those glass doors into Filene's Basement or Jordan Marsh to purchase clothing, and handbags. This was mostly women on the hunt it seemed, and the perfume counters in Filenes and Jordan's smelled so strong, I could smell the perfume and even taste it afterwards! But anyway it was both an exciting and sometimes scary experience as we got pushed along with the crowds of people, and is something I definitely will never forget.
Ah the memories... Sorry for losing the subject here. This nightmare came back as I read your platform scare.
John