Why we use Barriers instead of Barricades for Crash Protection!

In Summary TTM is a Very Dangerous environment and is probably the biggest uncontrollable hazard we have in our work sites, We are not so much controlling vehicles, but the person in control of the vehicle, including their perception of what we should do Vs. What we do do or are allowed to do, What influences do you think impede Road Users abilities while driving? No matter how well we do it, there is always the potential for it to go very wrong!

Thank You.