Big D

Ah, the fun of soldering very small things... it's come out quite well. Have you considered using fishing line between posts? It can easily be coloured using a marker pen. Also, shouldn't lineside fencing be at least 3 strands?

The height allowance isn't spot-on. There is a safety margin, not sure what it is though.... Doubt it'll be too much so shouldn't affect things too much.

I think this is All Saints Road, if so the bridge restriction plate shows a height of 15'9". Possibly you could scale from this?

So that's why it takes so long for the gates to open at Littleport..... You're too busy modelling!