I think I understand what you’re getting at but your terminology is backwards - what you’re describing is a wide turn. The obstacle is actually making people turn very sharply. Maybe my sense of scale is off, but the intersection in the picture looks it might even force some larger vehicles to make a three-point-turn.

I’m not sure why the people who put these in didn’t expect there to be lots of collisions. There’s a reason why obstacles are generally not placed in the middle of the road…