Complex sentence: By 1980, Deerfoot Trail had been extended further south to Glenmore Trail, and again to Highway 22X (now Stoney Trail) on its newly revised alignment by 1982.
Split into simpler sentences: By 1980, Deerfoot Trail had been extended further south to Glenmore Trail. Work extending Deerfoot south to Highway 22X (now Stoney Trail) was complete by 1982.