UK AWS and TPWS Photos
Contents: - Photo 1: AWS Ramp - Photo 2: TPWS Unit
Photo 1 - AWS Ramp
Photo 1: Standard UK style Automatic Warning System (AWS) unit as normally installed between the running rails. These devices are always fitted with a ramp at the approach end to reduce the risk of damage from loose train mounted equipment.
Photo 2 - TPWS unit
Photo 2: Train Protection and Warning System (TPWS) unit as normally installed between the running rails. Here the arming unit and trigger units are mounted together at the approach to a signal to ensure there is an immediate brake application if the train fails to stop.
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More articles on signalling:
The Development of UK Signalling - UK Railway Signalling Basics - Metro Signalling and ATP - ATP Transmission and Moving Block Systems - ATO - Route Signalling - ATC - UK Warning & Protection Systems - UK Signalling - What the driver sees - Single Line Signalling - US Signalling