I’m suspicious about many recent transport accidents, especially concerning railroads. But I am familiar with this bridge underpass, and it is tight even for two regular-sized cars. To be safe a large truck would probably need to pass under alone. My guess is that this truck driver didn’t realize how narrow the underpass was and entered with traffic coming at him, and he swerved a bit and hit the side. I also heard there was a train going over the bridge when this happened, so that could have been distracting, too. Though that is interesting coincidental timing...
I know that underpass, as well. I don’t believe that a tractor trailer would fit through it, even if it was centered with no oncoming traffic. Just a couple of weeks ago, a tractor trailer had to back up from the underpass all the way to the Alplaus turn (with Glenville PD assistance).
Even if he didn’t see the sign, just visually on approaching it, I would have thought that he would stop to check it out before trying to go through.
Fortunately, he survived and there was no one else injured.
The videos showing a train passing overhead through the flames, was pretty incredible.