For anyone who regularly takes Bennington St. in East Boston, It’s not really surprising to see a tractor-trailer buckled at the center in this exact spot. It happens a few times a year. The underpass is the first available U-turn to get back into Boston and it is clearly marked with a “No Trucks” sign.
Truck drivers however, are too used to seeing signs like that in places that they don’t need to be. It’s like the sign that cried wolf out there for truckers. Many roads are restricted to them but with exemptions for local deliveries. There are tons of parkways and throughways which restrict travel to passenger vehicles but are easily passable to trucks. So when a trucker sees a sign restricting travel he has to make a decision about whether it’s a necessary restriction or not. I have personally defied “No Trucks” many times as a tow truck operator.