(19 Aug 2013, 4:56 pm)BJ10VUS wrote It's interesting you should say that. When I was on a Vyking operating the 51, it had the announcement, but the centre doors were not used. However, when a Vyking with the announcement was used on the 58, the centre doors were used. Guess it just depends on the driver? I know they aren't used on the 57, despite the bus being plastered with signs reading 'please exit via the centre doors'.
I've had it on the 17 twice now, and both drivers used them. The 17 is also full of signs saying 'Exit via the centre doors', but they are never used.