On my map, Newport (in the yellow region) has only a number 10 (Elektro) space, and the other two spaces are empty (without any number). Is it a misprint or it means that only one player can place a house in this city (the other two are unusable) even in Step 2 and 3?
Oh, that is a misprint. As far as I can check this, all three numbers are missing in Newport. Of course this city should have the same numbers as all normal cities (10/15/20).