Note: this is is part of a series. See the first article here.
In the 1990s and early 2000s, the stop button appeared. The bus would stop only if there were people at the bus station or if one of the passengers pressed the STOP button. The latter action would signal the driver that he must stop the bus at the next station. Historically, before the button, there was the bell. A passenger signaled the intention to get of the bus by pulling o a cord attached to a bell next to the driver. However, the button is more elegant. Some companies have gone as far as to play the sound of a bell when someone presses the stop button.
If no one wants to get off the bus, the decision to stop if there are passengers at the station is entirely the driver’s. He must assess if the people around a stop are passengers or just walkers.