I have been tasked with risk assessing a concealed entrance with a view to supporting a mirror request which has been knocked back by the local authority. The local authority stating that casualty rate is too low to take action, previous site occupants have had no issues for 35 years and there is oppertunity to move back boundry walls, which inidently would provide no real assitance as the entrance/exit is at the end of a oncoming blind bend and a BT pole also sits right in the way also. Entrance /exit can't be moved either there isn't room. So my issue is I can dig around in the books and make consideration of passing traffic taking into considertaion the neraby vistor attraction, size of the village etc, but is anyone experianced with this who may be able to give me any pointers? This is only cars coming out by the way no trucks or anything and not a massive amount of cars either but regular comings and goings. 

I concur. We have an entrance that opens out onto a 30mph speed limited zone, with double yellow lines either side of the junction. Vehicles regularly speed in excess of 50mph down the road, compounded by the fact that everyone ignores the double yellow lines means that it is squeaky bum time every evening.

I asked for traffic calming measure, a mirror, traffic wardens popping down our estate etc. No matter what I asked I was always given a knock back. I suggested I put up my own mirror/signs and was told it is not my property and as such it would be illegal.

I resorted to sourcing some fake parking ticket bags and putti ng passive agressive notes in them on the illegally parked cars. (very English I know!). It worked for a time.

We have a very blind exit from an underground car park up a curving ramp onto a street, and we've tried and failed to get a mirror.  We’ve had a few collisions (though all low speed, fortunately, so while there’s been bent metal we haven’t had any significant injuries).   We said we'd pay all the costs and have failed. 

We did discuss with the owner of the opposite property putting one inside their boundary (again, we'd pay), and they were amenable to that but the sightlines don't work - we really need it in (or over) the footway opposite, and can't get the authority to agree it.

Need to either offer to fund at least part of this measure and/or get a competent road safety auditor to do a report showing how the risk has increased over 35 years. That report would cost more than a mirror.

I note in the OP it says the entrance is only used by cars.  Does that mean no vans or LGVs use the site or that vans /LGVs use a different entrance.  I'd be amazed if LGVs NEVER use an entrance, even if its heating oil, refuse collection or similar.  So, if there is a second entrance, the solution is given to you and solves your risk assessment- Block this route and make all vehicles use that  alternative entry/exit route.  If the second entrance/exit is available then failing to use that would be defeating your risk assessment at the first level (Removing the hazard)

Thanks everyone for your help and discusion on this, to reply to one question, no LGV's at all no alternative entrance it is cars only there is one small van a VW Caddy that the biggest thing in and out. 

I think your right the risk assessment is not going to help things at all but you do get pressed on these things sometimes and the plan is to offer this along with an offer of full cost cover unfortunatly now the authority have completely shut down conversation so the local MP has agreed to help as they believe it to be dangerous. I have read of some councils overturning descions so we will see. 

The entrance is on the nearside and while it is 30mph it is  aroad running thorugh a tiny village double yellows  double solid white lines in the middle. No one ever does 30 around there and traffic is not so low volume though owing to the nearby national trust property and the increase in the amount of events on the nearby farm. 

I am going to continue to fight as I hate the fact that not enough poeple have died yet is on the list of reasons for not allowing. Thanks so much everyone this has been realy insightful and helpful.