SCROLL-X combines a flexible light guide, electronic paper display, and laser projection technology to reduce the risk of placing an emergency stop sign when a vehicle breaks down during daytime or night time. The reel design can be installed in the trunk, allowing users to quickly open the Scroll-X after opening the trunk, and it automatically activates the enlarged vehicle breakdown message; combining with the projection of laser dynamic lane shifting indication several meters behind the breakdown vehicle. The approaching cars can clearly identify the warning from a distance to improve the chance of high-speed collision when the night visibility is poor. SCROLL-X can be used with mobile device APP and all kinds of hooking and standing accessories, which is widely used for temporary stop of bus and ambulance, police car pull-over stop, road construction and cleaning, etc.