Thought I would post this separate to the thread that's busy running on that hit-and-run fatality.
Not sure if it's been mentioned before, but if you're carrying a phone on you when cycling (I'd say most of us do?), or for any other possible emergency, it's advisable to have one or two numbers stored under the listing "ICE" - "In Case of Emergency".
Paramedics will look in your phone for these numbers. And it helps them to know who is the preferred person to phone - in my case, my brother - rather than phoning, for eg, the number listed as "Mum" - who might not be the best person to receive news of an accident first.