TPWS (Train Protection and Warning System) and AWS (Automatic Warning System).

AWS Indicator

Summary
The AWS Indicator (or sunflower) is mounted in the cab in the drivers field of vision whilst looking at the track ahead. It shows the status of the last AWS signal received by the TPWS Control Unit.
 
 
 

Product information request

Railway rolling stock
Railway signalling
Industry
Energy
Instruments
Maritime
Yes
Yes