Urban Thrie-Beam Crash Barrier

I need a complete design package for a thrie-beam crash barrier that will be installed along an urban road. My overriding priority is safety performance, so every element—from post spacing to connection details—must be optimized to absorb impact energy and keep vehicles within the carriageway... (Budget: $10 - $30 USD, Jobs: AutoCAD, Building Architecture, Civil Engineering, Design Optimization, Structural Engineering, Technical Documentation, Technical Writing, Urban Planning)