Safe signals

2019-03-06 08:10:01

By Barry Fox Trains could be prevented from going through red signals by a device being patented by Intelligent Cab Systems of Kent (GB 2356277). British trains have an automatic warning system that sounds an alarm if a driver passes a red or yellow signal. It does not stop the train. The AWS is activated by a magnets in a box beside the track. The new device superimposes an alternating magnetic field on top of the fixed field of the existing magnets. This can encode a range of specific messages from “clear” to “danger”,