Milwaukee County Transit System (MCTS) driver Irena Ivic spotted the boy, wearing only a red onesie and no shoes, running down the sidewalk at 8 a.m. on December 22, 2018.
Ivic pulled her bus over, crossed the busy street, picked the infant up, and called for help.
Carrying the toddler in her arms, she brings the child into her vehicle.More news: Missing Wisconsin teen found alive
"Oh my God, I was so upset", she told KTLA sister station WITI in Milwaukee.
Ivic, who will be honored Thursday by Milwaukee County Executive Chris Abele, spotted a boy alone on a freeway overpass near 4th and Mitchell.
Firefighters, police officers and transit security officers arrived at the scene soon thereafter.
The MCTS said in a statement that the baby was unharmed.More news: UAE beat India in Pulsating AFC Asian Cup Match - Highlights
Ivic said she was grateful she could keep the boy safe, MCTS said in a video about the incident. He was later reunited with his father, MCTS said.
Police say the child had been left outside by his mother who may have been suffering from a mental health crisis.
MCTS drivers have found nine lost or missing children in recent years, according to their website.More news: Rumor: Nokia 6.2 with a punch-hole display & Snapdragon 632 coming soon
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