Wardrobe culture of public transport

On Tuesday and yesterday I took public transport to work: BART (Bay Area Rapid Transit). The Bay Area’s version of a subway.
Normally I drive to a parking area close to my house and jump on a shuttle, which takes us the rest of the roughly 20 miles to work.
But the shuttle schedule recently changed, which means if I take the shuttle I don’t make my evening 5:45 and 6 p.m. yoga classes.
(I was supposed to go to yoga last night. But a last minute decision with friends at work had us having a fun night out drinking and eating, which we really needed.)
I decided to experiment this week with public transport. Besides the long ride and the crowded train where a seat isn’t available until people start offloading into the city (aka San Francisco) there are wardrobe issues.
I usually wear heels to work (yes, I know they are terrible for your feet).
In fact, I did a whole feet week on GFG! a few years ago. (The worst shoes for your feet; It’s feet week; And feet week concludes; and Comment Contest Tuesday.)
And most of my pants are rather long since I wear heels, which means flats are not an option with those pants.
Anyway, I wore flats on Tuesday and shorter length pants. I do have a a few pairs.
As I was on the train observing other women I noticed that there is a wardrobe culture for women riding public transport. Most women were wearing pants, which went to their ankles in length, and were wearing flats.
I tried to find information on this topic and didn’t. I, of course, didn’t do a ton of digging but I spent a considerable amount of time looking. But I did find specific instructions on how to take a bus.
I found a blog post asking us: Will you join the flat shoe society? But this was more about “high heel hell.” There’s one quick mention of public transport: … public transport would cease if women habitually wore high heels.
I normally plan my outfits for the weather. And some days it will also be for easy access to and for public transport.