Ports have a central meaning as nodes in a network of maritime transportation; a ship captain can only get to the right harbour if provided a good navigation chart. So it is interesting to see how the residents of these port cities are told how to go from one place to another by public transit (mainly bus in cities this size).
This somehow brings to the mind the work of Kevin Lynch on the image of the city, as well as how citizens perceive it. Sure, architects like global maps in which the whole network can be seen, but these are not always easy to understand for lay people, and besides their design is not always clear.
La Coruña has a lines map quite complex. It is a peninsula with a narrow isthmus which causes a heavy density of lines in certain areas, so it is not that easy for some to understand how to go from A to B. Bus stops have a simplified version of that network; some people complain that the map is hard to read in dense zones. The transit company’s website shows simply a list of stops along each line, and a link to google for maps showing which streets the bus takes.
I have found no clear, structured website about urban transit in Puerto Montt, but rather (and it seems quite usual in Chile) a central Government site that explains, by province, the transit networks by classes, including the municipal scale.
Brest has the most sophisticated public transit system of these four cities, with supra-municipal scale and a tram line. There is a real network map, quite clear, which reproduces the map of the territory without deformations; besides, line maps are also based on the geographical map. There is also an interactive map.
Even if this may come as a surprise to many given its quite peripheral location in the US and its sprawl, Duluth also has a public transit system. There is a map of the whole network, and the line maps are, as many similar things in the US (just think of the zoning map in NYC) utterly simple, but efficient. The street grid is reproduced under the line layout without deformations, for each line.
Overall, despite the role of the ports in the economies of these cities, transit networks show overall that there is a more complex reality (being otherwise clear that this minute analysis is just considering line layouts, excluding such things as schedules or fares).