However, with the implementation of the in Accelerated Train iyle project, the train will be opened. Ankara-Istanbul between the 5 hour to accelerate the accelerated train, Ankara simultaneously with Istanbul from the first time 5 June 2004 on Friday began. Accelerated trains were named after the poet Yahya Kemal Beyatlı and writer Yakup Kadri Karaosmanoglu. The price of the trip was determined as 24 million pounds.
On Thursday, July 22, 2004, a train accident occurred between Mekece-Osmaneli. The accelerated train departing from Haydarpaşa derailed in Pamukova. It was announced that 36 people died and 79 people were injured in the accident.
Accident 183. was in kilometers. If all the mechanics crossed the limits before the accelerated train, the penalty was cut. However, in the accelerated train, the limits were granted the right to exceed 10. In other words, the engineer 70 had the right to enter the 88 km at a very fast turn. An accelerated train was initially commissioned by 10 engineers from Ankara and Istanbul. However, all of them were highly experienced and the mechanics did not want the high-speed train because it was risky. Therefore, the le tourniquet uygulan system was introduced in the first day of the accident. The 65 mechanic was asked to use the accelerated train in response. For the first time, the mechanic who used the high-speed train was on this expedition.