new diamond interchange on I-85 at SR 324/Gravel Springs Road. The new exit will be located between exit 115, for SR 20, and exit 120, for Hamilton Mill Road/Hamilton Mill Parkway. The board voted in July 2019 to accept about $20 million (equivalent to $ in ) in federal and state grants to pay for the construction of the new interchange. E.R. Snell Contractors will complete the work. Since an overpass already exists for SR 324, on- and offramps, I-85 deceleration lanes, traffic signals, and turn lanes are the main aspects of the interchange to be added. The main goal for the new interchange is to provide another access point from I-85 to Mall of Georgia. Construction of the interchange is expected to start in late 2018 and will be completed in about 18 months. Exit list Auxiliary routes There are three auxiliary Interstate Highways of I-85 within Georgia and a fourth that was proposed, and then cancelled. I-185 is a spur from LaGrange to Columbus. It mainly provides a freeway between the Columbus and Atlanta metropolitan areas. I-285 is a heavily traveled beltway around Atlanta, which helps I-75 and I-85 drivers to bypass the city. I-485 was a short freeway in Atlanta (now Freedom Parkway) that was incomplete for many years and then decommissioned due to local opposition. I-985 is a spur from I-85 to Gainesville. See also References External links 85 Georgia Transportation in Harris County, Georgia Transportation in Troup County, Georgia Transportation in Meriwether County, Georgia Transportation in Coweta County, Georgia Transportation in Fulton County, Georgia Roads in Atlanta Transportation in Clayton County, Georgia Transportation in DeKalb County, Georgia Transportation in Gwinnett County, Georgia Transportation in Barrow County, Georgia Transportation in Jackson County, Georgia Transportation in Banks County, Georgia Transportation in Franklin County, Georgia Transportation in Hart County, Georgia High-occupancy toll roads