Denise, I tend to trust that strangers would stop and help. It seems like the times there wouldn't be someone around to help would also be the times there would be no cell coverage.

I should add that I carry (in my wallet, in my seat bag, and in my jersey pocket) a card with identification, health info, contact numbers, insurance information, preferred hosptial, allergies, and current medications. I made them up on the computer and got them laminated at Kinkos. After one of my friends did her ER rotation at med school, she implored all of us to carry this info with us. I figure it's especially important because I have asthma and take various meds.

There's probably cell coverage in 80-90% of the areas I ride, but I don't really know, since I don't have a cell.