Piedmont Avenue, and Memorial Drive were built and were subsequently converted to HOV usage in 1996 on the Downtown Connector. In 1996, HOV lanes were also added from I-285 on the south side of Atlanta to I-285 on the north side of Atlanta. In 1998, the portion of I-75 that from the Chattahoochee River north to the Tennessee state line was named the Larry McDonald Memorial Highway. Larry McDonald, a conservative Democratic representative to Congress, was aboard Korean Air Lines Flight 007 when it was shot down by the Soviet Union on September 1, 1983. He was the only sitting Congressperson to be reportedly killed by the Soviets during the Cold War. I-75 was also designated as the Horace E. Tate Freeway between I-85 to I-285 northwest of Downtown Atlanta, in honor of Horace Tate, who was a state senator in 1974. Until 2000, the state of Georgia used the sequential interchange numbering system on all of its Interstate Highways. The first exit on each highway would begin with the number "1" and increase numerically with each exit. In 2000, the Georgia Department of Transportation (GDOT) switched to a mileage-based exit system, in which the exit number corresponded to the nearest milepost. In March 2007, I-75's HOV ramp serving Northside Drive in Atlanta was the site of the Bluffton University bus crash where 7 out 35 people on board the bus were killed. The highway had a lane widening project completed in 2011, allowing the entirety of the Interstate in Georgia to be three lanes in each direction. On January 28, 2017, the new Peach Pass-only South Metro Express Lanes from SR 155 to SR 138 and I-675, opened. On September 8, 2018, new Northwest Corridor Express Lanes from the I-285/I-75 interchange to Hickory Grove Road and from I-75/I-575 interchange to Sixes Road have opened, the lanes require a Peach Pass to use. Future The I-75/I-16 interchange is being revamped with extra ramps to and from US 23/US 129/SR 49. GDOT estimates that the final portion of the project will be bid on in 2023. The segment of I-75 from SR 49 in Byron to I-16 in Macon is part of the Fall Line Freeway and may be incorporated into the eastern extension of I-14, which is currently entirely within Central Texas and is proposed to be extended to Augusta. Exit list Note: exit numbers along Georgia Interstates were renumbered