If you’ve followed the news and history of this bridge, the city did actually try. They increased the clearance from the original 11 ft 8 in to 12 ft 4 in, but that’s still a bit too low for large vehicles. There’s limited room to expand since that bridge is a rail bridge and there are utilities under the ground.

Because of the weirdness drivers know they have to pay attention or else death and injury awaits.

That is one thing I admire about chaotic roads. I remember hearing the rule of crossing the street in Hanoi is to just look where you want to go and walk in a straight line at a constant speed, and expect traffic to work around you. Standardization and signage really just exists to make driving easier.