My initial list at the outset of this thread was not exhaustive. Among the things I've added to my car gear the past couple years is "blaze orange" items -- including a blaze orange waterproof hunting coat that I got a sensational deal on ($17 for an $80 or so coat).

My motivation for adding blaze orange was for road safety, in case my car broke down someplace like the Beltway with its horrifying traffic.

Since this thread began, I found myself reflecting on the 2006 James Kim tragedy and considered that hi-vis should be part of any road kit year-around. The coat at a one-day sale I bought is similar to this one:

http://www.llbean.com/llb/shop/60155?feat=506569-GN3


I also have in the car one of these excellent blaze orange LED hats from LL Bean. Got one initially for our neighborhood orange hat patrol. Have since kept one in the car, too. The LED lights on it are surprisingly bright. A very good value for $20.

http://www.llbean.com/llb/shop/63736?from=SR&feat=sr


And in my nearest REI store they have large blaze orange "H E L P" signs marked down half so I picked up a couple of those -- one for me and one for my sister's car kit. They fold up compactly, taking not much more room than a cheap bandanna.

If I have occasion to empty the car out this winter I'll try to remember to take photos and do an inventory.