Sure, cut the noise and go straight to the point. Use a single LED on a battered radio panel that blinks green for safe roads, amber for caution, red for danger. Program it to switch states only when a vehicle passes within a few meters – that saves power. Add a simple button that lets a driver set a “watch” flag so the system remembers that road until it’s cleared. Keep the wiring short, use a low‑current driver, and store the map on a rugged microcontroller that pulls data from a single satellite uplink. That way the weak get a clear signal, and the rest of the convoy keeps moving fast.