On the Asian side, construction is in progress of the remaining portion of the 26.5 km (16.5 mi) long M4 line from Kadıköy to Kaynarca, yielding a total of 19 stations. It cost € 751 million and was built by the Astaldi / Makyol / Gülermak consortium.[24] The first section opened on August 17, 2012, terminating in Kartal. Construction of the 20 km (12.4 mi) long M5 line from Üsküdar via Ümraniye to Sancaktepe started in March 2012.[25]