سكة حديد بغداد
The CFOA was the busiest railway in the Ottoman Empire and was one of the two railways operating into İstanbul, along with the Chemins de fer Orientaux. The Baghdad Railway (İstanbul-Aleppo-Baghdad) connected with the CFOA at Konya to allow rail transport from İstanbul to the Middle East, although the Baghdad railway was not completed until 1940. The CFOA serviced major cities such as İstanbul, İzmit, Adapazarı, Bilecik, Eskişehir, Ankara, Kütahya and Konya. The railway also operated the Port of Haydarpaşa and the Port of Derince.