adding on to wat iveco said, using a manual clutch would not
make a ride a smooth and comfortable one, at least not at the level
an automatic transmission can bring.
automatic transmission also makes it easier for BCcs to learn and
less distracting on the road.
also, manual transmission is more suited if the driver likes to
have control over his vehicle in a sense that he wants to speed,
but in singaporean context, the authorities or the bus companies
surely are not thinking in that way.