The figures were given at the RSA Annual Academic Lecture today, the first event of Irish Road Safety Week. They related to an RSA study of 93 fatal motorcycle collisions between 2008 and 2012.
Almost half of the dead motorcyclists who had consumed alcohol were more than four times over the legal limit, the report says. The worst time for such incidents was between 5pm-6pm on Sunday afternoons.
Speed was a contributory factor in almost half of the incidents.
