REAR-END COLLISIONS THAT OCCUR IN FOG MAY BE CAUSED BECAUSE THE TAIL LIGHTS ARE NOT ON. MANY OF THE NEWER GM AND TOYOTA VEHICLES HAVE THE FRONT RUNNING LIGHTS THAT ARE ON ALL THE TIME THE VEHICLE IS IN DRIVE AND THE DRIVERS OF THESE VEHICLES ARE NOT AWARE THAT THEIR TAIL LIGHTS ARE NOT ON. THEY ARE UNDER THE BELIEVE THAT AS LONG AS THEIR LIGHTS ARE ON IN THE FRONT THE ONES IN THE REAR ARE ON ALSO WHICH IS NOT TRUE. I BELIEVE THAT THE REAR LIGHTS SHOULD ALSO COME ON WHEN THE RUNNING LIGHTS ARE ON OR IN THE LEAST MANUFACTURES SHOULD ALERT THE CAR BUYER THAT THE TAIL LIGHTS ARE OFF WHEN THEIR FRONT RUNNING LIGHTS ARE ON. I BELIEVE ALL CAR LIGHTS SHOULD BE ON WHEN DRIVING IN FOG OR AT NIGHT, SO THAT VEHICLES ARE EASIER TO SEE. *NM