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Originally Posted by heero_yuy
R4 news reported that the following train passed a red signal a 70MPH but had automatically braked down to 40MPH at the time if the collision.
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According to the BBC report, it was slightly faster.
Quote:
The train that had started its journey at Corby, passed this red signal, its brakes were activated for about nine seconds before the collision, when the train was travelling at about 76 mph.
Its speed had reduced to 49mph when the impact happened.
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I would have thought the problem with radar based systems is that by the time they detect a crash, its too late to stop. Trains take a bit longer than cars.