Amber means

STOP , if it is safe to do so, in other words if someone behind you isn't tailgating and isn't determined to 'beat the light'.

The dangers of multi-shot panoramas - American traffic lights go straight from red to green (proceed if it is safe to do so).

       Early morning walk to hear the birds, but no beavers about so I took no snaps  on the river walk. Still very cold.