Tim Mahon of Collegeville was driving westbound towards Limerick when he saw the big bird.
"It was a little restless. There was a Jeep next to it. There was a guy who I assumed was his handler or a farmer or whatever, trying to get a rope around him or get him settled down. There was a police officer, kind of running down 422 towards the emu,” Mahon said.
Things got back to normal a short time later.
KYW Newsradio reached out to Pennsylvania State Police and is awaiting further information.