It may be that attitude, drinking, inexperience, coordination, balance, or speeding by the driver cause many motorcycle accidents but in many more cases it is the unseen car driver that can't or doesn't see the cycliist; and, many times from the right front at pull-out or intersection. One solution besides a warbler or klaxxon of noise and light and high vis clothing might be to install a phone to GPS phone orcar device to bike device id and telemetry. Much like airplanes that show on radar and to each other. Kind of recycled and obvious but it might work. When a bike is near a car within a few 100 feet or 100 or 50...then a louder and louder beep goes off. Just extra heads up and awareness in the summer.