PACA is a paradigm shift from conventional design language rather than a hardware system. A life threatening flaw in a long existing design is corrected using PACA. All automobiles come only with red brake lights at the rear. This warning system has limitations because the red warning light is displayed only AFTER the driver hits the brakes. Reaction times to this red light by drivers following the braking vehicle is not sufficient thus leading to collisions and a possible pile up especially at higher speeds (Please refer to graph included). PACA-brake displays a prior warning orange blinking light on the third brake light (CHMSL) when the driver in the lead vehicle even considers slowing down his/her vehicle and before s/he actually hits the brakes. This in turn gives precious time for the driver behind to react and thus prevent a collision. The blinking is incorporated in the warning so that persons with Colour Vision Deficiency can read the warning.