500
Horns, headlights, emergency signals.
What is honk:avoid collision, get eye contact, when you cannot see 200 feet ahead narrow mountain road? What is headlights: low beams when cloudy, rainy, snowing, foggy, frosty/icy, anytime when can see other vehicles,even when sunny? What is emergency signals during collision ahead-tap brake 3-4 times, lift hood when safe, if have to stop-do where people can see you-use flashers, away from flammable liquids use flares 200-300 feet behind your vehicle, stay in vehicle until help arrives. Stay off road. Do not change tires standing in traffic and cannot see 200 feet ahead of vehicle.