Literally History on Instagram: "These highway traps are built to stop trucks when their brakes give out, serving as a last line of defense on steep mountain roads. Known as escape ramps or runaway lanes, they are carefully engineered to save lives when heavy vehicles lose control. From a distance they may look like simple gravel paths, but every detail is designed with purpose. The surface is made to slow a truck rapidly, while the incline forces gravity to help bring the vehicle to a safe stop