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 Testing Which Battery Lasts the Longest The World’s Deepest Buildings This Concrete/Asphalt Absorbs Water Like Magic Carbon Capture Plant Does The Work Of 40 Million Trees Self-Healing Robot Can Adapt To Injury Within Minutes Engineers vs. Machinists – Miracle Spinning Tops