There is ZERO cause for any of those crashes besides drivers being idiots. Notice most of them are small box trucks - those are almost ALL rentals, and I'd be willing to bed more than half of them are just everyday idiots trying to move themselves to a new house and they think they are still just tooling around in their car. And there are the other part time large vehicle drivers, those motor homes and travel trailers that wipe out rooftop accessories.
Three blocks worth of warnings plus an automatic red light - seriously, ANYONE driving through a red light like this one did, there is NOTHING you can do to not make that person a hazard on the road. If they don't hit this bridge, then they'll hit someone else, if they just blindly drive through a red light.
There's one near me, not only is the clearance low, the bridge is only 1 lane wide (and the road is two way). There aren't anywhere near this number of accidents there, and there are no electronic measures like they've put up here. A few hundred feet from one end of the bridge is another intersection - nothing special there except signs saying no left (or right) turn for vehicles over a certain height.
Then there are the "pro" drivers who aren't really pros yet - as in not far out of truck driving school. In the US you can tell them, as they most often drive for one of about 3 different carriers (the only places that will hire these inexperienced drivers) plus they ALWAYS follow the GPS. We have some roads that trucks over a certain size are supposed to be banned from. Mainly because the road is hilly and has sharp turns. However, you frequently find a truck there, they ignore all the signs saying they are not to turn left off the main road and do it anyway - because it's a short cut and the GPS wills how it as such. There are no clearance problems, they just block traffic up horribly, plus it was part of adding the additional warehouse space in the neighborhood that they would block trucks from this road and make them access the warehouses via a different route off the main highway. Still - there goes a truck that shouldn't be on this road. And another... the MAJORITY go around the way they are supposed to, you have to wonder about the one guy in line who sees 5 other trucks keep going while he's turning onto the road he isn't supposed to be on.