Nope, it would likely need to be made out of vibranium to do that. With conventional materials (ones that actually exist) the force that hits the bar is spread to the rest of the bus, pushing it forward. If the rear of the bus is solid then bus moves forward and it is possible the bus hits children. If the rear of the bus crumples to absorb the impact any children in the rear of the bus crumple.
The safest thing to do is have the impacting vehicle go under the bus.
Didn't knew that. I can understand that aproach, but isn't it possible for the bar to absorb the force?
You didn't know that, because it's an idiotic reason that is only applied in the US.
A car getting under another car is always big bad due to increased risk of decapitation, even in mild situations.
Nope, it would likely need to be made out of vibranium to do that. With conventional materials (ones that actually exist) the force that hits the bar is spread to the rest of the bus, pushing it forward. If the rear of the bus is solid then bus moves forward and it is possible the bus hits children. If the rear of the bus crumples to absorb the impact any children in the rear of the bus crumple.
The safest thing to do is have the impacting vehicle go under the bus.
Not unless the bar has an incredible capacity for deformation