Complex sentence: I-475 (UAW Freeway) splits off to the north to bypass the east side of Flint, and I-75 merges with US 23 to turn northerly to run around the west side of the city.
Split into simpler sentences: I-475 (UAW Freeway) splits off to the north to bypass the east side of Flint, and I-75 merges with US 23. The combined I-75/US 23 turns northerly to run around the west side of the city.