I think it is strange they have a regular green light when the “Must turn” light is on. why not a red light and a green right arrow if the Must Turn light is on. Once the over height truck turns the light can turn green.
Did they ever consider lowering the roadway? I mean, make a slight
grade in the asphalt (about 12 inches or so) would make hitting the bridge less likely.
When an overheight vehicle is detected, the light goes red. Unless the driver runs the light (which has totally happened, leading to high-speed impact drama), the driver has a whole red light cycle to contemplate the sign before driving through.
It looks to be a relatively major road (so trucks need to go to the surrounding blocks), right near a freeway off-ramp, and ultimately it keeps the fundamental problem (people ignoring signs).
There are businesses on a perpendicular street that receive deliveries from trucks that (at least for the old bridge height) were too tall. The only way to get to those buildings was to go up to this intersection and turn before the bridge. Notice that it’s never a local truck or even a pro truck driver that plows into this bridge. It’s almost always rental trucks. There was a lift truck that smashed it’s cherry-picker into the old bridge, but that looked like it was because someone hadn’t lowered the cherry-picker all the way.
With the windshield of the cab at max height instead of the cargo box. You know, so that the driver can more clearly see that they ain’t gonna make it under that bar.
“Overheight Must Turn” is clearly a slogan developed by the local tourism board to subtly reference local winemaking techniques. Because if Durham, North Carolina isn’t already well-known for its fine wines, that’s something that needs to change. Or not.