Marathahalli bridge/junction - what is even the point of sign boards 🤷‍♀️

There are no u turn signs, no left turn signs, no right turn signs. Is it even followed. I see people driving relentlessly, creating chaos. These are mainly the cabs, autos and quick delivery executives, and some times the construction vehicles and water tankers. Crossing the junction is a nightmare, whatever time of the day it might be. Are the traffic police even looking into this?

Why aren't cameras installed at the junction and challans are imposed on such vehicles