The mechanical wonder you see above is called the Road Zipper. Infrastructure Lindsay developed the incredible construction vehicle in 1984 as a quicker way to set up and adjust road barriers. This conveyor system lifts, rather than pulls, heavy “T-top” rails and gently moves them into place. The slats are then pinned together to create a wall. The Road Zipper has a maximum operating speed of 10 mph and is designed to operate on active roads so that on-road jobs can be carried out without congestion or traffic jams.