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 Programmable Table FIU Miami bridge disaster explained How Was this Incredible Stadium Constructed? Building a Next Generation Neutrino Experiment RICE Freshmen Engineers Created a Device to Ease the Pain of an Injection Aboard One of the Biggest Container Ships in the World