No, but experience has taught me that its nice to have some tools and basic survival items with you at all times.
About ten years ago while briefly stationed in Montana, I nearly killed my family by going down a snow covered trail in the late afternoon (in December) to look at a herd of elk.
After going down what appeared to be a plowed trail for about a mile, I stopped. It was then that my Isuzu Trooper sank to the door jambs in the snow.
I had my wife and two kids with me, no working cell phone, no blankets, no food, nothing...
At about 4pm I made the decision to leave them and take off walking (in jeans and a sweatshirt). I walked 3 miles and found a rangers station (took me about 2 hours and it was now dark and very cold). I was lucky that they knew exactly where I left the truck and they had a very large truck with a winch. It took 3 hours to get the truck out. If I had made the wrong decision and walked the opposite direction it would have been 10 miles to the nearest help.
Ever since then, I dont care where I am, or what I am doing... I have basic supplies with me at all time. I dont care if help is across the street!!!