Should still be possible, only that the driver have to check
carefully. Don't forget in Europe they have bendies exceeding 20m
such as the MB Capacity with 4 doors and boarding is allowed at any
door.
There is a slight difference although boarding is allowed at any
door.
In Europe they just crowd around the bus stop and board the bus
like we board the MRT. But in the interchange in SG we have 1 queue
and the queue needs to split to different doors, not forgetting the
walk to each of the doors. And given that people are kiasu and
wants a seat, they would run towards the doors.
So, probably not something you want to see in peak hours in an
already crowded interchange?