2000 Naka-Meguro derailment

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Naka-Meguro train disaster
2000 Naka-Meguro derailment damage.jpg
Details
Date8 March 2000
approx 9:00 am
LocationNear Naka-Meguro Station
CountryJapan
Line TRTA Hibiya Line
Operator TRTA
Incident typeDerailment
Statistics
Trains2
Deaths5
Injured63

The Naka-Meguro train disaster occurred in Japan on 8 March 2000. Five people were killed and 63 were injured when a derailed TRTA Hibiya Line train was sideswiped by a second train near Naka-Meguro Station.

Contents

Accident

At around 9 a.m. on 8 March 2000, the rearmost car of an eight-car TRTA Hibiya Line (now Tokyo Metro Hibiya Line) train from Kita-Senju to Kikuna derailed on the tight curve immediately before Naka-Meguro Station. The derailed car was then hit by the fifth and sixth cars of an eight-car Tobu Railway train travelling in the opposite direction from Naka-Meguro to Takenotsuka.

Factors

It is generally the case that if the distance between tracks is less than the width of the carriages this only allows about 600 mm clearance, so that if a train derails on the same side as the other track, it will almost certainly obstruct the other track, making a collision inevitable. Track circuits detect the presence of a train via electric current passed through the rails, which is shorted by a train car's axle or a physical break in the rails. If a derailment on an adjacent track, that doesn't cause a physical break in the other track, won't cause the track circuit to 'short' resulting in a stop signal. In this situation, a train crew member must either warn railway signal staff of the derailment, stop other trains using a handheld signal, such as a red flag, or manually short the track circuit using a specialized equipment, such as a track circuit operating clip.

See also

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References

    35°38′44″N139°42′02″E / 35.64556°N 139.70056°E / 35.64556; 139.70056