>>1213369>Why do some buses have blue interior lights?That's to allow passengers to see stuff inside the bus at night while also not making the inside too bright for the driver to see outside.
>Why do new modern train make some funny noises?That's just the electric motor and/or the transformer which is providing DC current to the motors from an AC power supply. The huge amounts of current just causes that noise.
>>1213572>Why don't buses have seatbelts?Buses rarely get to a speed where the seatbelts would do much, plus buses usually are carrying passengers for a short distance, and as such, seatbelts become impractical. Some buses in Europe do have seatbelts, but passengers will rarely use them.
Legally speaking, bus passengers are also not required to wear them.
Meanwhile, coaches are a different thing. Private hire coaches in Europe must have seatbelts, and passengers must wear them. Public transport coaches on the other hand are legally buses, so...
