Stoplights

In Germany and Denmark, the stoplights, before switching to Green from Red, switch back to Yellow for 2 seconds! (Both Red and Yellow are on for these 2 seconds) The rest of the light sequence is just like in the US: Green, then 5 or 6 seconds at Yellow and then Red. I was told that this quick switch back to Yellow again after Red was so that people with manual transmission cars can be ready to go as soon as the light turns Green. This sounds brilliant to me! Even if your country did not have a lot of manual transmission cars why wouldn't you make your lights like this?