Google has announced that it is considering rolling out its high-speed Fiber internet service to three additional American cities. The company stated on its Fiber blog on Thursday that it hopes to enter a joint planning process with the cities of Irvine, California; Louisville, Kentucky; and San Diego, California. "We'll work with Irvine, Louisville and San Diego to conduct a detailed study of factors that affect construction," wrote Jill Szuchmacher, Director, Google Fiber Expansion, "such as local topography, housing density, and the condition of existing infrastructure."