What problems did Garrett Morgan solve?

Garrett Morgan was an inventor and businessman who addressed several safety and public health issues. He is best known for inventing the three-position traffic signal, which improved road safety by providing a clearer signal for drivers and pedestrians. Additionally, Morgan developed a safety hood, an early version of the gas mask, which was used by firefighters and in World War I to protect against smoke and toxic gases. His innovations significantly contributed to advancements in public safety and emergency response.