The first patent for automobile turn signals was granted in 1925 (some sources say 1929--it may depend on your interpretation of the claims on the different patents). Electric turn signals first appeared on production cars in 1938.
No, they do not have traditional turn signals but have flashing lights.
my turn signals do not work in my 1992 Pontiac Firebird
No, but the turn signal relay has a direct effect on the turn signals.
No, turn signals are required on the vehicle.
The turn signals are not programmable.
Turn signals are definitely preferred. Most drivers don't look for hand signals, but, they do look for turn signals. Some people don't even know how to make correct hand signals while driving.
Required by law (motorcycles manufactured before 1973 are not required to be equipped with turn signals.)
Me
You use your arms out he widow as signals.
Traffic signals were invented in Cleveland, Ohio, by Garrett Morgan, born in Paris, France.
If you mean turn signal hand signals, then yes.
Smoke signals were actually invented in 900 BC. They were first invented in ancient China to protect the Great Wall of China.