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 Man Transforms ‘Back To The Future’ Cars Into Bizarre Creations 19 Year Old Hopes to Revolutionize Nuclear Power This is the Innovation that Changed Bridges Forever Why We Want a Perpetual Motion Machine, But Still Can’t Get It Futuristic Highway That Wirelessly Charges Electric Cars as They Drive ‘Zipper’ truck builds tunnels