 The western half of North Avenue carries U.S. Highway 29, U.S. 78, and U.S. 278, but the eastern parts of those highways follow Ponce de Leon Avenue, just one city block north of North Avenue.Eastbound lanes cross over on northbound-only Piedmont Avenue, westbound lanes one block west on southbound-only Juniper Street, which continues south as Courtland Street.These are the two blocks east of Peachtree Street, Atlanta's main north/south street and the division between the eastern and western quadrants of the city.