I'm surprised they didn't include the SF Muni logo -- it has a really weird, almost unrecognizable M. Very distinctive.<p><a href="https://upload.wikimedia.org/wikipedia/commons/thumb/9/95/Muni_worm_logo.svg/1200px-Muni_worm_logo.svg.png" rel="nofollow">https://upload.wikimedia.org/wikipedia/commons/thumb/9/95/Mu...</a>
The interesting question isn't 'how', it's why.<p>E.g. one of the 'metro's in the UK is a tram system in Manchester. And the one thing people might call a 'metro', when compared to other cities and countries is the London Underground, which everyone including the government[1] calls The Tube. And that's just a red ring with a blue line through it.<p>The more I think about it, the more bizarre it makes us Brits sound. Tubes, choobs, toobays...<p>[1] <a href="https://tfl.gov.uk/modes/tube/" rel="nofollow">https://tfl.gov.uk/modes/tube/</a>
Germans don't get to play because here it's called U-Bahn: <a href="https://en.wikipedia.org/wiki/Rapid_transit_in_Germany#/media/File:U-Bahn.svg" rel="nofollow">https://en.wikipedia.org/wiki/Rapid_transit_in_Germany#/medi...</a>
Direct link to the source (large images, sorted by similarity):
<a href="http://mic-ro.com/metro/metrologos.html?size=lg&sort=similarity" rel="nofollow">http://mic-ro.com/metro/metrologos.html?size=lg&sort=similar...</a>
Some of the agencies here don't fit the problem of 'M' meaning 'Metro', for example the last logo (Row 7) is described as Liverpool's metro system. It is not a metro system but a full train operating company and the 'M' is for Merseyrail
The Recife (Brazil) logo is just brilliant.
<a href="https://mapa-metro.com/en/brazil/recife/recife-metro-map.htm" rel="nofollow">https://mapa-metro.com/en/brazil/recife/recife-metro-map.htm</a>
The Massachusetts Bay Transportation Authority has solved this one!<p><a href="https://en.wikipedia.org/wiki/Massachusetts_Bay_Transportation_Authority#/media/File:MBTA.svg" rel="nofollow">https://en.wikipedia.org/wiki/Massachusetts_Bay_Transportati...</a>