Abstract: A method and apparatus for providing warnings related to vehicle separation. The warning device of the invention generally includes a distance measuring sensor positioned on a rearward facing surface of a first vehicle, the distance measuring sensor being configured to measure a distance between the first vehicle and a second vehicle following the first vehicle, a microprocessor controller in electrical communication with the distance measuring sensor and being configured receive input from the distance measuring sensor and generate outputs therefrom, and a visual warning device positioned on the first vehicle and being in electrical communication with the microprocessor controller.