I’ll tell you one interesting thing about this topic. Everyday,
I go to school, I take Service 74 SBS 7275 D
at about 7.05 am. When this bus is reaching a particular bus stop,
the driver immediately opens the door even the bus hasn’t stop yet.
When I’m boarding and alighting the bus, I love to hop on the
moving bus or jump down the moving bus. Maybe the driver is trying
to save the journey time; as the driver must wait for the bus to be
fully stop and then open the door, that would waste a few seconds
of the time.