 Over the next two decades, Shoreline was connected to Seattle via the Seattle-Everett Interurban streetcar line (1906) and North Trunk Road (now Aurora Avenue N., State Route 99) (1913), helping to increase its population.The name "Shoreline" was applied to this stretch of unincorporated King County in 1944 when it was given to the school district, since the school district boundaries stretched from "Shore to Shore" (Puget Sound to Lake Washington) and "Line to Line" (the old Seattle city limit of 85th St to the Snohomish County Line).Though the modern borders of the city do not stretch to Lake Washington, the area has kept the "Shoreline" name.