A malfunction with a southbound ramp meter that allows traffic to trickle onto Ga. 400 from Northridge Road caused a major backup on Tuesday morning.

A technician was working on the issue Tuesday and that the ramp meter will be fixed by Wednesday morning's rush hour, according to a spokesperson for the state Department of Transportation.

The ramp meters had been out of service for a little more than a year while construction has been ongoing at the interchange. It was reactivated last Monday, according to Natalie Dale, a spokeswoman for the Georgia Department of Transportation.

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Inventor Lonnie Johnson stands with his Super Soaker water guns at JTEC Energy on Wednesday, Oct. 29, 2025, in Atlanta. Johnson, a former NASA engineer, is currently working on a new energy technology through his company’s JTEC device that turns thermal heat into usable energy. (Natrice Miller/AJC)