The Traffic Barrier-Transfer Machine Caltrans is studying the durability and performance of its Barrier-Transfer Machines, also known as “zippers.” Facebook Prev Article Next Article Engineering Checkout these cool gadgets... Related Posts This Radical Redesign Could Keep Gas Engines Pumping SlideWheel – Worlds most thrilling waterslide – or is it ? The Subzero Lab Where Scientists Recreate Avalanches In a Box Black pearl Launch of a modern sailing ship NASA To Invest In Eco-Friendly Commercial Supersonic Jets Teenager Invents Quantum Space Propulsion System That Doesn’t Use Any Fuel