CAUSATION OF ACCIDENTS: Are most bicycle accidents that cause injury caused by motorists?

No, but many are.  Many motorists simply don’t see bicyclists because they are not expecting to see them. To add to the problem, bad decisions by bicyclists do not help the statistics. Other causes of bicycle accidents include defective bicycles and parts, badly built or maintained roads, poor repair jobs and attacks by dogs. An injured California bicyclist has the right to sue in all of the above causes.