Some courtesy plz..

On my way back to home from office, was waiting in the signal..It had started to drizzle by then..There was a public transport which had halted in the signal too. These days, we find some buses in chennai which ply with automatic door locking system,. Though they claim its automatic door, its controlled by the driver. The doors doesn’t have any intelligence of its own.
A old couple was knocking the bus door, driver took a notice and refused to open..I felt bit annoyed seeing it..By then it started raining very heavily..
First instant i felt, its wrong to board a bus in the signal. These days most of the signals are fitted with timers, we had couple of seconds for the signal to turn green.
They were repeatedly banging the door, and the driver turned deaf ears..Then the old couple staggered to walk and managed to reach the payment...What is he going to loose by letting them in?? Is he giving a place in his home for them to stay?? Is it too much of courtesy to expect from a third person??