Through the weekend, crews will be closing lanes on I-285 and Ga. 400, along with local roads, as part of the four-year project to overhaul one of metro Atlanta’s most important interchanges.

This means closures on large northern metro roads like Roswell Road, Mount Vernon Highway and Johnson Ferry Road.

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Now through Sunday, expect workers pacing traffic on I-285 eastbound and the westbound on-ramps to Ga. 400 north and south from 7 a.m. to 7 p.m. This is to let crews get staff and materials to the work sites, according to the Georgia Department of Transportation.

Click here for day-by-day details of expected closures.

This is all part of the nearly $800 million remake of the interchange.

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Previously reported as one of the biggest highway projects in Georgia history, it entails: "new I-285 interchanges at I-20 east and west of Atlanta, new Ga. 400 express lanes from I-285 to McGinnis Ferry Road and truck-only lanes on northbound I-75 from McDonough to I-475."

Crews broke ground on the project in late 2016 and are expected to finish in 2020.

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From February...

It's all part of Georgia Department of Transportation's multi-million dollar improvement project to reduce traffic and enhance safety at the 285-400 interchange.

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