The black man credited in a lengthy post of black inventors for making the first traffic signal Garrett A. Morgan did not invent the traffic signals.
TrueorfalseOnline with a cursory research can reveal to you that the traffic signals was invented almost a decade before Morgan Garret was born. Garret was born in Kentucky in 1877 and died in Cleveland Ohio in a 1963.
The inventor of the traffic signal however was born in Nottingham in 1828, invented the traffic signals in 1868 (9 years before Garret was born) and died in 1886. His name is John Peake Knight and he invented the traffic signals for railways not cars. Read more
Garret Morgan did invent many things including the safety hood (gas mask) he also did improve on the original traffic signal to invent the first 3-way traffic signal for cars in 1923 (the year his patent filed in 1922 was approved).