I always have my cell phone. In the contact list are the numbers for police and sheriff Depts in all the jurisdictions in which I ride. That came in handy when I got hit by a car four months ago. I crawled over to my bike, dug out my cell phone, and dialed the city police, lying on my back on the pavement as the driver stood over me asking "are you allright?" I was badly bruised but nothing broken, and he got a ticket for careless driving.