I made a short run that included crossing an 18 mile bridge yesterday. I was able to easily grab my Personal Support Kit (in a hunting vest) and sling it around the back of my seat.
As I expected, the ice slush was about 1"-2" thick on the shoulders of the bridge. The roads were wet with no ice, except for along the shoulders of the road.
Having this Personal Survival Kit, in my hunting vest, will definitely meet the requirements for a highly mobile kit, when I am in transit to and from work in a rental car.
The weight and volume is small enough for me to carry it with the rest of my "stuff" when I have to walk a 1/4 to 1/2 mile out a long dock to get onto my boat!
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QMC, USCG (Ret)
The best luck is what you make yourself!