A Georgia HERO operator was critically injured early Sunday when he was hit by a car on the Downtown Connector, Atlanta police said.

Moses King, an officer with the Georgia Department of Transportation’s Highway Emergency Response Operators program, was setting flares to block two lanes of traffic because of an earlier accident in the northbound lanes near Seventeenth Street.

A 2006 Mazda driven by 25-year-old Lindsay Clark skidded into King and then struck a 2013 Ford driven by Vinson Baker.

Police arrested Clark on charges of driving under the influence, reckless driving and serious injury by vehicle.

No one besides King was injured.