Possibly by waving your arms or by flashing a torch (flashlight).
how to make road rail signal using electromagnet
Buy a "highway" turn signal flasher
.
Amplification.
there is really no way to make it better except for maby getting closer to the source of the signal.
Flasher relay.
Turn signal drain? Never heard of such a thing. What make, model, and year vehicle?
Five honks or more is the internal signal for attention.
Make a signal fire.
Stimuli
Stimuli
A lead or lag applies to a signal due to active components to make it lead or lag the original signal