After the train accident in Ankara, “signalization” discussions are continuing. Experts responded to Minister Turhan in this way.
Following the high-speed train accident in Ankara's Yenimahalle district, the Minister of Transport said "Is there any signaling?" his answer to the question caused controversy. Experts, stating that they disagree with Minister Turhan, defended the necessity of the signaling system.
The statement, which was first explained by the President of the United Transport Union, Hasan Bektaş, that there was no signaling system before the accident, was not rejected by the TCDD and the Ministry of Transport. Regarding the system in question, Professor of Okan University International Logistics and Transportation Department. Dr. Güngör Evren, a professor who gave an opinion on the condition that his name was not disclosed and Professor Felix Schmid, Head of the Department of Rail Systems Risk and Safety Management at Birmington University, made important statements.
According to the news of Fundanur Öztürk and Burcu Cura from BBC Turkish; Prof. from Okan University Dr. Güngör Evren said, "There is nothing acceptable and technically defensible in the absence of signalization in the high-speed train line." “Signaling is a system to ensure security in order to avoid an accident like yesterday. When a train departs, whether there is another train in front of it, the distance between other trains and the possibility of collision / collision are determined by the signaling system. ” Evren said that he could not believe the news about the absence of signaling after the accident.
Train lines are divided into small parts called cantons or blocks and each of these parts is protected by signaling. If there is a green light in front of you in the canton, there is no danger. If it illuminates red, it indicates a danger. Or if it is lit yellow, it indicates that there is a train in the canton but not in the next one and warns that its speed will be adjusted accordingly.
When the news of 'No signaling' started to fall after the accident, I actually thought it was a claim that must be proven, I said 'I guess not so much'. Because the necessity of signaling is not possible to think otherwise.
In no way can you say 'Why the guide train and the high speed train were on the same rail, we don't know'. If there is no signaling somewhere, then the speed of the train should also be very low, in which case the high speed train cannot be mentioned.
Professor of International Logistics and Transportation from Okan University. Dr. Gungor Evren
“Signaling has two main functions”
Another view on the subject came from a professor who requested that his name not be disclosed. Underlining that the system has two basic functions as "safety" and "efficiency", the academician said, "By signaling, on the one hand, the safety of the trains is guaranteed, while on the other hand, as many trains are able to benefit from the railway capacity." said.
the Train "to act on the same line" said the professor must play a critical role in terms of signaling safety, because there is 12 thousand kilometer line in Turkey reported that the signalization of about 5 thousand kilometers.
It is possible to stop a train on the railways at an average speed of 80-100 per hour, but only a few hundred meters. 250-300 meter is the distance of the mechanic in the railways, it is unfortunately not possible to stop the train at this distance. Therefore, signaling systems leave a few kilometers distance between two trains.
more than expected in Turkey train crash occurred
Professor Felix Schmid, Head of the Rail Systems Risk and Safety Management Department of Birmington University, made explanatory findings regarding the signaling system. "It takes 1,5-2-3 kilometers of safe distance for trains to stop completely due to the obstacle in front of them." said.
"The signaling system is absolutely necessary for both high speed trains and normal speed trains." stating opinions as Professor Schmid, he said he realized the train accident more than expected in the last few years Turkey.
Professor Schmid argued that the cause of the last accident in Ankara might have been that the security system could not recognize the guide train.
My guess is, the direction was not designed to be able to define the technical guide rail system in Turkey. So the guide train was still on the rails when the high train was approaching
Source : www.milligazete.com.t is