Complex sentence: The current State Government has almost completed an underpass at Anzac Highway and overpass of the Adelaide-Glenelg Tram, and in the next few years will construct a tunnel under Grange Road, Port Road and the Outer Harbor/Grange railway line to further reduce congestion.
Split into simpler sentences: The current State Government has almost completed an underpass at Anzac Highway and an overpass of the Adelaide-Glenelg Tram. Further plans exist to construct a tunnel under Grange Road, Port Road and the Outer Harbor/Grange railway line to further reduce congestion.