Some new traffic lights have been installed nearby. There is a Turn Right
Filter.
On approaching you see either the red / amber / green for ahead and right
if clear - or the Green Right Filter for Right.

Some have been assuming that the green signifies clear for ahead or right.

It occurred to me that we need an Amber Filter. Easily achieved with LEDS.
If Amber the turn if safe - otherwise wait.

What do others think?