Maps that help people see which services are coming soon are remarkably rare in Europe, for a variety of complex reasons. Some European systems have such high frequency overall that it may seem unnecessary, but there are usually still significant frequency contrasts that matter.
Now, there’s a great example out of Luxembourg. The Paris-based Serbian designer Jug Cerovic has been featured here before, for his interest in making networks clearer by emphasizing a core geometric idea. Not just for beauty, but as a way of combatting the mental overload that complex maps can cause.
Luxembourg’s transit system has just rolled out an official network map by Cerovic. It highlights frequency with wide lines, including such details as how wide frequent lines split into narrow infrequent ones. (Detailed PDF is here.)
Obviously this is a diagram, seeking network clarity rather than precise fit with local geography. The core geometric idea is the pentagon, a feature of the Luxembourg CBD that he uses, but not to excess, in arranging patterns. He explains his design process here.
UPDATE: For comparison, this was the previous map. (H/t @ParadiseOxford)