If you don`t know "public transport" ICONS, I suggest that you "Googlet" Subway icons, Tram icons and Bus icons and then make your pick. This debate has been done all most a year ago by me and couple another members, and I still claim that that transport is subway (Amsterdam has it btw).
I wasn't trying to offend anyone with my post, it's quite natural to get confused when the travel icon in the middle say "Public Transportation" and when actually being lucky enough to get the random chance of the Cosplay Collectable, it states to be within a subway train car.
To me a Subway is under ground and doesn't look like an above ground Tram or Bus.
The Change Log mention a New Location, so on in all, when reading this forum for clues to the Cosplay Collectable, it's fair to assume the new location would be a subway station. I guess the new location is Emma's home btw.
I got the collectable after a few rides, 100% completion on everything so all is good
About the debate taken place a year ago, well I did use the search function when in doubt, didn't get anything helpful and wasn't about to browse back a thousand pages just to be sure if there was a clue among the posts
For those still puzzled on the collectable in this update:
Use the middle icon to travel somewhere, the Public Transportation.
It's a chance based find, doesn't appear to have much to do with where and to you travel, or what time of day, you'r either lucky or not.
Longer travels might have a higher success chance though, but can't be certain on it.