Yenikapı was expected to be completed in December 2009 but due to archaeological findings at the construction site delayed the project by four years.

In 2008 plans to extend the M2 and the M1 lines south were finalized and Yenikapı was chosen as the southern terminus.

Most trains use the center track while the Spanish solution method of boarding and alighting is used via the two island platforms.

The Turkish State Railways (TCDD) services Yenikapı via an island platform on the trans-Bosphorus Marmaray rail tunnel.

Once the rehabilitation of the existing rail lines are complete, Marmaray commuter service will run west to Halkalı and east to Gebze.