Senior VR Member
Join Date: Mar 2012
Thanked 1,577 Times in 1,411 Posts
Fault on the cager, not the motorcyclist.
Headlight flashing as an effective mode of driver communication has been questioned, and researchers have found the ability of drivers to communicate with one another is about the same as the communication abilities among insects. However, when used as a means of increasing conspicuousness to other drivers, as in the case of motorcycle high/low beam modulators, it is highly effective.
Flashed headlamps can have ambiguous or contradictory meanings, with no way for the observing driver to tell for sure what the flashing driver is trying to say. It may mean, for example, that the flashing driver intends to yield the right of way, or instead that he intends to take it. Misinterpretation of the flashing driver's intent can cause crashes.