Transport tycoon in the Netherlands is played by 4 or 5 competitors. You can see make out their coloring and general area of operation on this map too.
Fun fact: In the Netherlands you have to make sure you 'checkin' to the right transportation company, some stations have 3 checkin posts. Very annoying and embarrassing and error prone.
https://commons.wikimedia.org/wiki/File:OVC-palen_in_station...
In Italy there are competing fast trains on the same track, all with a red color. With people on the station selling tickets to only one of them. ... So I asked them for the first train from Vincenza to Milan at 13:30... That is 14:44...I bought the 14:44 ticket from "Italo". Then found out there was a "Trenitalia" at 14:04! ... Sorry mister.. this was OUR first train..not THE first train.
Edit: I just noticed that the marker style changes if I choose something other than "Equipment" from the map style dropdown, selecting "driving/stationary" certainly makes it a lot more readable.