Kansai Enko 87 Work _verified_ -

A standardized “87 Work Test” was created. Each train driver had to perform a shikou kensa (braking check) at three specific test points where false clear signals had been reported. If the ATS triggered correctly 100 times in a row, the section passed.

The result was a reduction in false approach locking events (where a train brakes unnecessarily due to perceived red signal) by 73% on the Hanshin Main Line by spring 1988. kansai enko 87 work