Because they want to be seen just as the guys that weave coming up to a stop and the guys that wear hi-viz - and schoolbuses, and fire trucks and cops and and and.
Deal with it. - they got YOUR attention didn't they
Single headlights get lost in the background - a bit of flickering makes it standout - same reason a train uses a modulator AND a triangle patter.
Deal with it. - they got YOUR attention didn't they

Single headlights get lost in the background - a bit of flickering makes it standout - same reason a train uses a modulator AND a triangle patter.