(16 Aug 2015, 10:36 pm)BusLoverMum wrote The 24 branded ones don't do it, either. It only seems to be a problem when the doors aren't shut properly when the bus is moving.
When the handbrake is not applied but the doors are opened, the alarm goes off for 'safety' purposes.
A lot of drivers save themselves the hassle of applying the handbrake (most likely because it costs them precious seconds).