Invergowrie rail accident


Invergowrie rail accident

__NOTOC__infobox UK rail accident


title= Invergowrie rail accident
date= 22 October 1979
location= Invergowrie, Scotland
line = Glasgow to Aberdeen line
cause= Signal passed at danger
trains= 2
pax=
deaths= 5
injuries= 51
The Invergowrie rail accident happened at Invergowrie in Scotland on 22 October, 1979. The accident killed 5 people and injured 51 others.

Accident

The 08:44 passenger service from Glasgow Queen Street to Dundee, despite running late and experiencing technical difficulties, left Invergowrie station without incident. However, the brake on the leading bogie of the locomotive was binding, although the driver carried on as Dundee was only a few miles away.cite book | first=Stanley | last=Hall | year=1987 | title=Danger Signals | publisher= Ian Allan | id= ISBN 0-7110-1704-2 ] As the train was running along Invergowrie Bay a traction motor caught fire and the train was stopped.

Approximately ten minutes later, the stationary train was run into at around 60 mph by the 09:35 express from Glasgow to Aberdeen. The impact threw the last two coaches of the Dundee train over the sea wall and into the Firth of Tay, though fortunately the tide was out. Both passengers in the rear carriage and the driver and secondman of the Aberdeen train were killed instantly. A further passenger died later and a total of 51 people were injured.cite book | last=Department of Transport | coauthors=Maj C.F. Rose | year=1981 | title=Report on the Collision that occurred on 22nd October 1979 at Invergowrie in the Scottish Region British Railways | publisher= HMSO | id=ISBN 0-1155-0543-1 | url= http://www.railwaysarchive.co.uk/docSummary.php?docID=781 ]

Investigation

The signalman at Longforgan signal box stated that he put the mechanical starting signal correctly back to Danger behind the Dundee train. Around ten minutes later, the Aberdeen train arrived at his box and drew up to the Home signal, which was then cleared for it. The train continued to draw down to the Starting signal but, after a few moments, began to accelerate. It passed the Starting signal which, as far as the signalman could see, was still at Danger. He went down onto the track and saw that the arm of the Starting signal was slightly raised; about 4°. Subsequent investigations showed that it was possible for the arm to have been raised roughtly 8°.

The guard of the Aberdeen train said that he had looked out of the window of the rear coach at Longforgan as the train picked up speed. He saw the starting signal giving "a poor off" (in other words, somewhere between the "on" and "off" positions), but he assumed that it had already been put back to Danger after the locomotive had passed it, and perhaps had not quite returned to the horizontal position. It is not clear if the guard could have seen the starting signal exactly as the driver would have seen it. The subsequent public inquiry found that the guard was not to blame.

Why the driver passed the signal remained a mystery. The inquiry speculated that he may have been looking back towards the signal box, or checking that the train was clear of the level crossing. As he then looked up towards the signal he might have concluded that it had moved since he had last seen it and that it had, therefore, been cleared by the signalman.

Various operating staff who saw the signal both before and after the accident also gave evidence that the arm was not properly horizontal, including some who said that the degree of elevation appeared to increase as they got closer to it. It was later found that the signal post bracket was badly bent. The bracket may have been struck by a chain hanging from a wagon, or perhaps by engineers' machinery working on the lineside.

In addition, the signalling at Longforgan was basic, and lacking in many safety features. The Starting signal had no AWS which would have warned the driver of the Aberdeen train, nor was there an adjuster for the pull wire. There was also no repeater in the signal box, nor was a detonator placer provided.

References


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