2005 Deelfontein train collision

The Deelfontein rail crash was a head-on collision when the Shosholoza Meyl Trans Karoo express hit the stationary Blue Train at a crossing loop at Deelfontein in South Africa in October 2005.
Although there were some serious injuries, there was no loss of life. The cause of the accident was found to be a wrong side failure in the signalling, caused by solder splatter in one of the interlocking relays.
Aftermath
The signalling circuit improperly bridged by the solder splatter appears to have been single-switched. To prevent a recurrence, double switched circuits are proposed, also called secondary protection circuits.
 
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