Wonder if it’s marked as a humpback bridge? Doesn’t look like the kindof road you really want to meet anything down, but reversing would be a nightmare too. Bet the people ordering the boat forgot to mention a bridge unless the driver just followed a car nav and shouldn’t have been going anywhere near there.
As for tractor, not sure how that’s going to help. If you pull it forward it’s going to scrape the heck out of the bottom of the trailer including presumably any wiring - could really do with a crane or a couple of wreckers at very least. Btw, how much can tractors pull as I guess 44T is maybe beyond them? I know some like to think they are HGV drivers, but pretty sure they are limited and end up doing wheelies.
Don’t low-loader trailers have air suspension lift at the back?