Even ignoring that everyone comes to a stop at a redlight and you lose the progress, you genuinely only save three seconds of time, like you said.
Devil’s advocate: sometimes those three seconds mean they make it through the light and you don’t. And that lead stacks with more and more intersections along the trip.
Reality check: there is no three seconds. You don’t get anywhere appreciably faster, you just put everyone around you in danger because of the foolish and reckless need to be “one car ahead”.
It doesn’t stack with additional red lights. If you assume you have an equal chance of hitting all red lights and all red lights have the same delay then it doesn’t change anything more than the delay of redlight.
Devil’s advocate: sometimes those three seconds mean they make it through the light and you don’t. And that lead stacks with more and more intersections along the trip.
Reality check: there is no three seconds. You don’t get anywhere appreciably faster, you just put everyone around you in danger because of the foolish and reckless need to be “one car ahead”.
It doesn’t stack with additional red lights. If you assume you have an equal chance of hitting all red lights and all red lights have the same delay then it doesn’t change anything more than the delay of redlight.