Abstract: The object of the invention is to provide a method and an apparatus for detecting obstacles on railways and stopping the train to prevent collision with the obstacle. The detecting device in or on the train is following the rails and detecting any obstacle on the rails. The image of the rails with obstacle is sent to a computer, analyzed, directing the detecting device to the rails and sending the images to a monitor and alarm the driver by an alarming system to actuate the brakes and stop the train before hitting the obstacle. The computer may also actuate the brakes automatically and stop the train before hitting the obstacle.