Otogar-Bağcılar Rail Mass Transportation System Electro-Mechanical Works Construction and Supply of Rolling Stock works introduced by the General Directorate of İstanbul Electricity, Tram and Tunnel (İETT) is contracted on 14.02.2005 with the Doğuş İnşaat – Gülermak Joint Venture. Due to the extension of the said track up to the İkitelli Olympic Village, the revised contract amount has reached USD 718.025.416.