I really dislike flashing red lights on bicycles or pedestrians (runners wear these sometimes). I think it is harder for motorists to tell how far away a flashing light is and they are way more distracting to drivers than solid red lights and can cause impaired drivers to steer towards the cyclist. However, the law says red reflector or flashing red light. Most of the new laws will be enforced through the manufacturers and not directly on the street or bike trail. I know there has already been a lot of debate about them.