combined level crossing flashing lights and traffic lights

[PJW]

It'd be good to see this photo; I really can't think of one in the UK. Even where there is a level crossing very close to a crossroads wich necessitates interlocking between the road traffic lights and the crossing I do not visualise the "wig-wags" on the same post as the traffic lights.

I can't find anything in the book itself which you mention..

1. Certainly it could easily confuse a driver to be presented by a green traffic light and flashing red wig-wags. Let's hope they do obey the latter. Really can't understand what circumstances would make this a sensible arrangement. Note that in the UK a police officer has the authority to give permission for a driver to pass a red traffic light, but NOT flashing red wig-wags (because these are used to protect AHBC and this could be a very dangerous thing to do)

2. I'd certainly hope that anyone who decided to produce such an arrangement would have submitted to a Human Factor's Assessment.

Anyone else aware of such installations- I guess not in the UK but elsewhere......

Hi Signalling Engineer:

Recently, I am just reading the "introduction to railway signalling" book the part that describing the level crossing and I remembered I have seen the photo of combined flashing lights and traffic lights on the same post that someone has showed me before. Since I am not familiar with combined installation, I have questions such as

1. is the driver be more likely to obey the flashing lights or the traffic lights (personally, I think the driver would be more likely to obey the flashing light since it 'flashes' and attract the driver attention) I'm not sure whether I am right for this ?

2. is there any human factors behind this ? and how can a signal design engineer take this into the level crossing design ?





thanks