What is the primary purpose of the warning triangle on the road?

Answer: B — To signal a broken-down vehicle

The primary purpose of the warning triangle on the road is to signal a broken-down vehicle. When a vehicle experiences a mechanical failure or encounters an emergency situation, it is crucial for driver safety to alert other motorists about the disabled vehicle. By placing a warning triangle at a safe distance behind the vehicle, drivers can increase visibility and awareness of the hazard, allowing approaching vehicles to take necessary precautions, such as reducing speed or changing lanes to avoid a potential collision. This practice is especially important on roadways where speeds are high or visibility may be limited. Ensuring that other drivers are informed about the presence of a stationary or slow-moving vehicle helps to prevent accidents and enhance safety for both the occupants of the disabled vehicle and other road users.