Originally Posted by
turbo1889
I think it is possible to make a narrow 6-8 inch wide bicycle turn signal indicator that would clearly indicate direction. Just make a a large square grid of LEDs and have them activate in two different flashing arrow shapes clearly showing an arrow pointing the direction of the turn. ....
Depending on how far back the vehicle was, which direction the arrow was pointing would be difficult to distinguish. That's the advantage of red middle and flashing amber to one side, it's easier to see from a distance which direction is being indicated. Same with moving sequential lights.