Mass transit agencies around the world face the same conundrum: How to make what amounts to four straight lines distinctive.
Various ways to design a transport network with one letter arounfd the world.

seen from Italy

seen from United States

seen from Netherlands

seen from Italy
seen from United States
seen from Hong Kong SAR China
seen from Poland
seen from Germany

seen from Italy
seen from Germany
seen from Canada
seen from Hong Kong SAR China
seen from United States

seen from United Kingdom

seen from Netherlands
seen from Uzbekistan

seen from Ecuador

seen from Italy
seen from United Kingdom

seen from Türkiye
Mass transit agencies around the world face the same conundrum: How to make what amounts to four straight lines distinctive.
Various ways to design a transport network with one letter arounfd the world.