700mph hyperloop moves closer to reality with construction of giant safety valves Hyperloop Transportation Technologies claims the new valves will be able to withstand 288,000 pounds of force The HTT safety valves Credit: HTT A hyperloop train system that could transport people at 700mph has moved a step closer to reality thanks to the construction of the world’s first safety valves that can withstand 288,000 pounds of force. The loop is a proposed form of ultra-fast transportation that was first touted as part of a design released by teams at Elon Musk’s Tesla and SpaceX back in 2013. The technology relies on tubes with extremely low air pressure to allow a pod - filled with people or freight - to travel free of air resistance or friction.