Editing M1 (section)

=== Railways ===
* [[Bucharest Metro Line M1]], part of the Bucharest Metro, Romania
* [[Chesapeake and Ohio class M-1]], a steam-turbine locomotive
* [[Line 1 (Budapest Metro)]], the first line of Budapest Metro, Hungary
* [[LNER Class M1]], a class of British steam locomotives 
* [[M-1 Rail Line]], now the QLine, streetcar service in Detroit
* [[M1 (Copenhagen)]], part of the city's Metro system, Denmark
* [[M1 (Istanbul Metro)]], a light railway system in Istanbul, Turkey
* [[M1 (Lausanne Métro)]], part of the Lausanne Metro in Switzerland
* [[M1 (Paris Métro)]], the first rolling stock on the Paris Metro in 1900
* [[M1 (İzmir Metro)]]
* [[M1/M3 (railcar)]], a series of electric multiple unit cars on the Long Island Rail Road and Metro-North Railroad
* [[Metro M1 (Prague)]], metro kit M1, which is used on line C of the Prague Metro
* [[Milan Metro Line 1]]
* [[M1 (Warsaw)]], the first metro line of the Warsaw Metro
* [[PRR M1]], a class of steam locomotive
* [[M series (Toronto subway)]], former rolling stock of the Toronto subway
* [[Metro North West & Bankstown Line]], the first metro line of the Sydney Metro