Dude........can't you fight it and force it into court? No jury in their right minds would allow that charge to stand. Even if it's a closed court (me not knowing US legal systems) you'd get the chance to put across a reasonable argument. Damn, I'd really have argued the toss with the copper..... I would have took pics of the trestle (scaffolding?) as evidence of no signs and when the time comes to pay the fine not done it and forced a court appearance. And I'm a law-abiding citizen! Blimey, that's a LOT of dosh for the 'crime'....... (",)