Multiple choice general knowledge science & technology

automatic traffic lights by:

  1. Sir John Harington

  2. John Froehlich

  3. Ian Donald

  4. Garrett A. Morgan
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Garrett A. Morgan invented the automatic traffic signal and patented it in 1923, later selling the rights to General Electric. His system included a warning position to allow vehicles to clear intersections before cross traffic started.

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