From Amazon: 

A completely updated and expanded edition of the cult bestseller, featuring subway, light rail, and streetcar maps from New York to Nizhny Novgorod
 
Transit Maps of the World is the first and only comprehensive collection of historical and current maps of every rapid-transit system on earth. In glorious, colorful graphics, Mark Ovenden traces the cartographic history of mass transit—including rare and historic maps, diagrams, and photographs, some available for the first time since their original publication. 

Now expanded with thirty-six more pages, 250 city maps revised from previous editions, and listings given from almost a thousand systems in total, this is the graphic designer’s new bible, the transport enthusiast’s dream collection, and a coffee-table essential for everyone who’s ever traveled in a city.