If there's a long gap between the stops, people may forget what's the next stop. Announcing at the opening may be too late or the stop has to be long enough. Ev

If there's a long gap between the stops, people may forget what's the next stop. Announcing at the opening may be too late or the stop has to be long enough. Even for slow passengers in a crowded bus. Announcing a minute before the stop is a good heads-up that bus is approaching the stop and people should prepare.