fin azvandi Veteran Location Hong Kong Oct 4, 2012 #2 Nice catch! Reminds me of today's xkcd comic (animated GIF):
Gary All-Pro Location Southern California Name Gary Ayala Oct 5, 2012 #3 That signal signifies reverse.
Luckypenguin Hall of Famer Location Brisbane, Australia Name Nic Oct 5, 2012 #4 Take an average: (Red + green) / 2 = orange = accelerate