Complex sentence: The Western Australian section of Eyre Highway is on the western side of the Nullarbor Plain; the South Australian section crosses the eastern section of the Nullarbor Plain, and the top of the Eyre Peninsula.
Split into simpler sentences: The Western Australian section of Eyre Highway is on the western side of the Nullarbor Plain. The South Australian section of Eyre Highway crosses the eastern section of the Nullarbor Plain, and the top of the Eyre Peninsula.