nfitz
Superstar
But what when GO frequencies increase. GO is talking about 15-minute frequencies on some lines in the next decades; which is as good or better than some subway lines in other cities in the late evening. One option could be like TFL's high-frequency services map - which shows lines that run with a 15-minute or better daytime frequency more prominently than lines that run less often (and it's interesting to note that not all the London tube lines run that frequently). It also shows streetcars.Edit: BTW, I don't think commuter/regional rail should be included either, for similar reasons. Again, the fare system is different, but the service is also much lower than subway. The lines, if included, should be thinner (like on my map), not thicker (like on the Paris map).
http://www.tfl.gov.uk/assets/downloads/High-frequency-services-map.pdf
And perhaps the answer is multiple maps. London has at least a half-dozen different tube maps on their website for different uses.