A backpack containing rechargeable battery and light weight frame for telescoping mini light bar to be used by highway patrol officers when they have to dismount the Crown Vic to attend to traffic emergencies on foot. Like when someone gets their suv upside down in the near lane and the officer must get traffic to notice it, maybe deploy cones or such. Would make them less vulnerable.-- cudgel, Aug 12 2009 Some police officers in the UK have shoulder-worn blue strobes on their Hi-Vis jackets when dealing with traffic.-- 8th of 7, Aug 13 2009 random, halfbakery