Interstate 575 (I-575) is an auxiliary Interstate Highway in the United States, which branches off I-75 in Kennesaw and connects the Atlanta metropolitan area with the North Georgia mountains, extending . I-575 is also the unsigned State Route 417 (SR 417) and is cosigned as SR 5. I-575 begins in northern Cobb County near Kennesaw and goes mostly through Cherokee County, ending at its northern border with Pickens County, where it continues as SR 515. It is also the Phillip M. Landrum Memorial Highway in honor of Phillip M. Landrum (1907–1990), who was a Representative from Georgia. It is entirely concurrent with Georgia State Route 5. Route description For almost all of its length, I-575 has two lanes in each direction, with a road median of grass, along with crape myrtle (a locally-common landscaping tree) or wildflowers, both of which are summer-flowering. Each direction has one truck lane for climbing uphill (miles 12 to 13 northbound, miles 10 to 9 southbound), two extended acceleration lanes (north from Towne Lake Parkway and south from Marietta Highway), and two auxiliary lanes (connecting Bells Ferry and Chastain Roads). The city of Holly Springs recently annexed land to Sixes Road. Other cities that have annexed I-575 include Canton and Ball Ground. I-575 crosses the Little River between Woodstock and Holly Springs and has four bridges over the Etowah River in northeastern Canton as it flows under the southern half of the Riverstone Parkway (former SR 5) exit. It also crosses Noonday Creek between Barrett Parkway and Chastain Road at the northeast corner of Town Center at Cobb regional mall. That stream roughly follows the freeway northward on the east side of the road, passing alongside the northbound ramp to SR 92 and then crossing back under to the northwest just before Towne Lake Parkway. At the Canton and Holly Springs exit, the two city limits meet. Here, the road (old SR 5) was realigned to cross I-575 at a more perpendicular angle when I-575 was constructed. This left two dead-end streets: Hiram Way in Holly Springs and Travis Tritt Lane in Canton. Just north of here, I-575 crosses Univeter Road. The entire length of I-575 is part of the National Highway System, a system of routes determined to be the most important for the nation's economy, mobility, and defense. History I-575 was mostly constructed as a suburban spur highway, intended to serve an undeveloped