There's been a bit of discussion recently of risks for motorbikes vs cages, and evaluation of risks for riders. As numbers is my thing, I decided to find out for myself. For fatalities data I used the Australian Fatal Road Crash Database. To calculate fatality rates I used the (now annual) Australian Motor Vehicle Census, which contains registration numbers by vehicle type and state. A couple of quotes from my report are as follows: In 2008 in Australia, there were 4.65 driver fatalities for every 100,000 registered motor vehicles (excluding motorcycles), and there were 41.23 motorcycle rider fatalities for every 100,000 registered motorcycles. [....] We conclude by emphasizing that the roads are becoming safer for both motorbike riders and motor vehicle drivers, and that motorbike riders have nine times the risk of death in a traffic accident than vehicle drivers. The report can currently be downloaded in pdf using the link on the following website: http://www.yhacycling.org.au/accidents.html Although it is 10 pages it is virtually all graphs. Please use as you wish, as there is no copyright. I ask one thing: if you want to comment on the quotes above, please read the report first. I'll be interested to hear what you think.