HITOMARUKUN is a lightweight mobile crash barrier specifically designed for low-speed urban roads and construction zones. It solves the most practical problems on construction sites – traditional barriers are too heavy to move, too slow to deploy, and take up too much storage space. Weighing only 13.4kg, it can be easily carried by a single person. Its foldable structure allows it to be stored in a vehicle trunk when not in use. Operating on a purely mechanical principle, it