Thanks for explaining, because the OP made it sound like the red light tricked you into wastefully shedding speed instead of letting you stay at the speed limit. Their language makes it sound like they view slowing traffic as intrinsically good, rather than just trying to prevent speeding.

I should have been clearer on two behaviors. What I describe is if you are "alone". Green light often (not everywhere) don't stay green if there is no car. But if there is traffic, it is made in such a way that when you get a green somewhere, you can expect every subsequent intersection to turn green when the head of the traffic arrives. So the first vehicle will see a red light turn green as they approach, and the ideal timing is around the speed limit. Further cars will have a green light, but with no intensive to speed as they are sandwiched between cars.

Also I should say that this is empirical evidence based on about 20 intersections I pass often. I don't know how much of a rule it is country wise as I don't pay attention to that when I go places I don't routinely go.