All the companies urge drivers not to stop in a tunnel or on a bridge but to move a train to safer places in emergencies. However, there are no clear instructions of what to do when a train has stopped in a tunnel.
According to the transport ministry's Railway Bureau, there are no uniform rules or regulations concerning evacuations after railway accidents. Instead, each railway company must devise its own manual.
"The results of an investigation into the latest accident should be shared among railway companies," a ministry official said.
Train services between Shimukappumura and Shin-Yubari stations on the Sekisho Line resumed Monday--59 hours after they stopped due to the accident.