but what will be the "opportunity cost" to rail generally of spending hug sums on road projects? Its costing £50 million a mile plus to convert a short stretch of the A465 into dual carriageway in South Wales
Time to face facts. IF you don't do the investment in the A5 then congestion will get worse and worse.
You can reinstate Gobowen - Oswestry if you like, but it will make sweet FA difference to the congestion that's happening. You can go as far as reinstating the whole line all the way to Welshpool - it will still make no difference.
You can jack taxes up on the road haulage industry - all you'll achieve are higher prices in the shops which hits the end consumer and job losses in the haulage industry - endless rail re-instatements won't off-set that.
You can continue with the congestion on the A5 which will deter tourists from visiting and staying in the area. If we were doing a family holiday to North Wales we'd want to take the car - if you want to make that a difficult, costly or unattractive proposition then fine - but we won't go on the train, instead we'll jump in the car and drive to Luton or Birmingham airport and fly off somewhere nice and sunny - so the economy of North Wales loses out - your choice.
The point I was making - which is still valid - is if the works are being done on the road, that is the opportunity for the CHRS to get their passageway over / under the A5 completed in a far more cost effective way than trying to self fund a bridge project.
Incidentally, I don't think you understand the concept of 'opportunity cost' - I suggest you go and look it up, because it's not what you seem to think it is.