This is the work we have to do as individuals, to struggle with our understandings against the real world we live in and challenge our own positions and understanding to more thoroughly champion those values we hold dear. Keep going, you’re on the right path. Keep struggling, it only gets harder for a while. If it starts getting easier, you’re going the wrong way.
As far as I know. When speed limit goes UP, the speed limit takes place as soon as the sign is visible. But, When the speed limit goes DOWN the limit is in place at the location of the sign and beyond