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 Dawn Of A New Era: The Revolutionary Ion Engine That Took Spacecraft To Ceres The Insane Engineering of James Webb Telescope Testing Which Battery Lasts the Longest The World’s Deepest Buildings Transportation of the Future – Building the Hyperloop The cool science behind how the Lexus hoverboard works