200-300 buggy accidents annually in the US. 20-30 deaths. Main cause — car couldn't stop in time.
Physics
Buggy: 8 km/h, no brake lights (or tiny ones). Car: 80 km/h, driver looking at phone. Braking distance at 80 km/h — 36 meters. Buggy visible at 100 meters (night — 30). Result: 2 seconds to decide.
What They Do
Reflectors (mandatory). Lanterns (battery — compromise). Riding shoulders (when available). Bright triangles. But some communities refuse — and litigate with the state.