The post you are reporting:
Have to sympathise with the Aycliffe residents, I can remember even fifteen years ago seeing the sky turn yellow from the amount of sulphur (apparently now spelt the u.s. way, 'sulfur') in the air. The A20 past Aycliffe and Avo (Megger ?) and down through Snargate Street is probably one of the most dangerous roads in Kent to negotiate, and of course, the local residents see very little, if any, benefit from living in a hugely profitable ferry port. The unfortunate thing is that the port and the town have been separated from eachother so that the profits go elsewhere other than the local residents, and hardly anyone who suffers from the downsides get any advantages from the 'up-sides'.
What is even worse for Aycliffe is that it is historically a council estate, and so will be lumbered with the noise and pollution in preference to the 'villages' of river and whitfield. Its very unlikely you will ever find a local MP of a member of the landed gentry moving in up the estate, so I would guess you'll have to find a different way of dealing with the problem.
I'm sure you have local councillors who will take up the challenge, but even if the lights were moved back a bit, you will still suffer from Dover's yellow sky.
I would never advocate any course of direct action (thought never even crossed my mind m'lud) but I wonder how the slightly-more-militant-than-us French might act in similar circumstances.
In the UK it is illegal to sound your horn whilst stationary, police should nick them, give them on the spot fines and send them to the back of the queue.
Nearly another rant, must watch my bp...