A system for increasing the security of road users. The system includes motor vehicles, each having a security device that can be activated by an activation signal associated with a security assistance request. The system includes a mobile communication device for transmitting position-data and a selected security assistance request. The system includes a control device for receiving the security assistance request and the acquired current position-data and for transmitting activation signals associated with the security assistance request to an assisting motor vehicle. The control device is configured to specify the one assisting motor vehicle also depending on the acquired current position-data and the security assistance request.