Editing M4 (section)

== Transportation ==

=== Air ===

* [[Covington Municipal Airport (Tennessee)]], FAA location identifier M04
* [[Maule M-4]], a 1960 American four-seat cabin monoplane aircraft
* [[Miles M.4 Merlin]], a 1930s British five-seat cabin monoplane aircraft

=== Rail ===

* [[Bucharest Metro Line M4]], Romania
* [[Line 4 (Budapest Metro)]], Metro 4 or M4, Hungary
* [[M4 (Copenhagen)]], a future expansion of the Copenhagen Metro, Denmark
* [[M4 (Istanbul Metro)]], a subway line on the Asian side of Istanbul, Turkey
* M4, variant of the [[M2/M4/M6 (railcar)|M2]], an American electric multiple unit on the Metro-North Railroad
* M4, an American rapid transit car on the [[Market–Frankford Line]]
* [[Milan Metro Line 4]], rapid transit line in Milan, Italy
* [[Sri Lanka Railways M4]], a class of diesel-electric locomotive
* [[M4 (Warsaw)]], proposed subway line in Warsaw, Poland

=== Road ===

* [[BMW M4]], a car
* M4 [[Vacamatic]], a 1941 semi-automatic transmission made by Chrysler
* M4, a bus route of [[Fifth and Madison Avenues Line]], New York City, U.S.
* [[Mid-engine, four-wheel-drive layout]], or M4 layout, an automotive design
* [[List of M4 roads]]