Adapazarı Express, which runs between Haydarpaşa and Adapazarı, will serve gradually until the end of January. The train services that will be interrupted due to the construction of the high-speed train line between Köseköy and Gebze will not be made during 31 year from 2 January.
1 January-31 January between Istanbul-Adapazari between the 10.00-15.00 hours will not be made between. The high speed train line between Köseköy and Gebze will be interrupted due to the repair operations, 31 2 will not be made during the year.
Due to the work to be carried out even for the 122 years, the new line was intersected with the existing line, the Köşoyöy-Gebze section of İzmit was completed concurrently with the Eskişehir-Köseköy stage and the line had to be completed in 2013 by the General Directorate of TCDD.
Source : http://www.haber3.com