Which of these inventors worked primarily on the improvement of trains and streetcars? elijah mccoy garrett morgan granville t. woods lewis howard latimer

Granville T. Woods

Explanation:

Granville Tailer Woods, an African-American inventor with more than 50 patents, is also the first American of African descent to be a mechanical and electrical engineer after the American Civil War. Self-taught, he concentrated most of his work on trains and trams. One of his notable inventions was the "Multiplex Telegraph," a device that sends messages between train stations and moving trains. His work ensures a safer and better public transportation system for the cities of the United States.

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