Complex sentence: By the early 1980s, traffic volumes on the parkway exceeded capacity, and today, the parkway has significant traffic congestion on most days, earning it the quasi-affectionate nickname of the "Don Valley Parking Lot".
Split into simpler sentences: By the early 1980s, traffic volumes on the parkway exceeded capacity, and today, the parkway has significant traffic congestion on most days. The daily congestion has earned the highway the quasi-affectionate nickname of the "Don Valley Parking Lot".