There is provided a method to stop or slow down a vehicle in an emergency, said vehicle comprising an emergency stop system able to cause the vehicle to stop or slow down, the emergency stop system being able to receive stop signals from users that are not driving the vehicle, the method comprising the steps of a) the emergency stop system receiving a first signal to stop the vehicle, b) the emergency stop system immediately starting a timing procedure, c) the emergency stop system, within a predetermined time window, receiving a predetermined number of further signals to stop the vehicle, and d) the emergency stop system, if the required number of signals has been received, immediately causing the vehicle to stop or slow down.