The barriers in the three photos that show them are called bin blocks, and not DOT approved. Traffic approved barriers are required to have a deflection mechani

The barriers in the three photos that show them are called bin blocks, and not DOT approved. Traffic approved barriers are required to have a deflection mechanism (that is why the common jersey barriers and K-rails you see have angled faces) or shock absorption mechanism. You can't have a flat face that doesn't move. There are also composition requirements. Bin blocks are just made from remnant materials.