Crushing chest pain can be a sign of a heart attack. The driver may faint at the wheel, so to avoid an accident you must stop the vehicle immediately and switch on the emergency lights.
The driver has symptoms of a serious medical emergency (for example, a heart attack), which can lead to loss of consciousness and an accident. Road safety comes first: you must stop the vehicle immediately and safely and switch on the emergency lights. Once the vehicle is safely stopped, call an ambulance and keep the person at rest.
Option 1. Going to the nearest hospital means continuing to drive, which is extremely dangerous, because the driver may lose consciousness at the wheel.
Option 2. Giving valerian does not treat a possible heart attack and ignores the danger of a moving vehicle.
Option 4. Physical activity, such as walking, increases the strain on the heart and can make the condition worse.