Rail buses (diesel train sets) within TCDD serve for many years. Existing gates are the pneumatic outward opening gates. With the modernization Project done, the gates of these vehicles has been converted to an electric motor-driven sliding gate. All the strength and appearance of the exciting vehicle is maintained, old Gates are removed and modifications are carried out on the vehicle body. The mechanism and the door wings are attached to the portal renewed and mechanical installation is completed. Signalization modification is carried out for the machinists in the vehicle o be able to perform automatic control and communication between vehicles. Vehicles of which tests and inspections are completed are delivered to enterprise after painted and cleaned. So, vehicles are modernized very quickly, cruise and passenger safety is increased.