Well lets throw the leaving on the green out the window first. That will always bee too slow no matter what.

If you have 60 fts in the mid 1.40's you should be able to leave at the flash of the 3rd amber and not go red leaving at a dead idle.

That's another thing.....I have never been able to get a car to react consistently leaving at an idle foot braking.

You need some RPM to tighten the drive line and suspension up before you leave.

Try 2000 RPM and see how it works. If you RT is slow go up in RPM and vice versa if its too quick.

What you have to be careful of is not to anticipate the 3rd coming on. You need to leave when it comes on.