This is a route-map template for the M4 (Istanbul Metro), a rapid transit line in Turkey.
- For a key to symbols, see {{railway line legend}}.
- For information on using this template, see Template:Routemap.
- For pictograms used, see Commons:BSicon/Catalogue.
Note: Per consensus and convention, most route-map templates are used in a single article in order to separate their complex and fragile syntax from normal article wikitext. See this discussion for more information.