The largest road project in state history is just about finished.

Officials with the Georgia Department of Transportation told Channel 2 Action News the Northwest Corridor Express Lanes project should wrap up by late summer.

“This is a unique project for us," said Stephen Lively, one of the project managers. "We’re really excited to deliver such a large scale project to the traveling public.”

The 30 miles of reversible express lanes stretch down parts of I-575 in Cherokee County and I-75 in Cobb County before ending at the I-285 interchange near SunTrust Park.

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