> you can't fit more trains on the track no matter what control "protocol" you use. This is false, CBTC has greatly increased L train capacity: https://en.wiki

> you can't fit more trains on the track no matter what control "protocol" you use. This is false, CBTC has greatly increased L train capacity: https://en.wikipedia.org/wiki/Automation_of_the_New_York_City_Subway#Canarsie_Line_CBTC https://en.wikipedia.org/wiki/Automation_of_the_New_York_Cit... The Canarsie line is two-tracked and doesn't have any mechanism for passing besides single-tracking (also, no tail tracks at the Manhattan terminus).