High-speed rail accidents occur frequently in China. Has anyone checked the reason? Is it really necessary to say it over and over again?

The main reason is that there is something wrong with the signal. Under normal circumstances, the train should be connected with the signal display through the track circuit, so that the signal display can automatically change with the running position of the train. At the beginning of each block partition, a color light signal for protecting the partition is set. These signals usually show green light, which is called "open positioning"; Only when the train occupies the blocked area or the track breaks, will the red light be automatically displayed, requiring the subsequent train to stop. High-speed rail 1.5 km. Now the high-speed rail locomotive is fully automatic. If it is blocked, it will stop automatically.

Although the final investigation result of the "7.23 Ningbo-Wenzhou Special Accident" has not been announced, the problems in the signal system and dispatching system are the main reasons. As far as I know, China Railway Communication Signal Group Corporation (hereinafter referred to as "China Signal") provides overall signal integration for this railway. Casco Signal Co., Ltd. and Beijing Railway Communication Signal Research and Design Institute Co., Ltd. (hereinafter referred to as "Signal Institute") under the company are also important equipment providers. Hollysys is the ATP supplier of the accident train.

The signal system of Yong-Wen line is mainly integrated by Hao Tong, China, and its engineering branch is responsible for the specific construction.

On May 9, 2008, Hao Tong, China, signed a four-power system integration contract with China Railway Electrochemical Bureau Consortium and Coastal Railway Zhejiang Co., Ltd. China Hao Tong Group undertook the communication signal system of this contract, and the contract price was about 500 million yuan.