Dive summary:

• Archer Western Contractors, Hubbard Construction and Parsons Transportation Group will build a 29.7-mile project northwest of Atlanta that will add toll lanes to I-75 and I-575 that can used for inbound commuters in the morning and outbound traffic in the evening, the Georgia Department of Transportation has announced.
• The companies submitted a team bid of $599 million for their piece of the public-private partnetship project, which officials said would bring the total project cost down to $840 million.
• The Northwest Corridor project, to begin 2014 and be open in early 2018, will put two toll lanes alongside I-75 until it meets I-575 in Cobb County, then put single reversible lanes in the media of I-75 and I-575 as they go further northwest in Cobb and north into Cherokee County.

From the article:

The public-private partnership project—which GDOT calls "long-anticipated and much-needed"—is being procured via a design-build-finance contract. ...