Answer:
When it comes to me you go on red and stop on green.
I am a food with 5 letters. If you remove the first letter I am a form of energy. Remove two and I'm needed to live. Scramble the last 3 and you can drink me down.
I mean goodbye for South Americans.
You throw me out when you use me and take me in when you are done.
I have a face but no eyes hands but no arms.
When someone uses this acronym, you know you've got to pick up the pace