Complex sentence: In 1994, US 64 was placed on new freeway south of Tarboro, eliminating the business loop; most of which was replaced by NC 33, with the stretch between Western Boulevard and Northern Boulevard downgraded to secondary road.
Split into simpler sentences: In 1994, US 64 was placed on new freeway south of Tarboro, making the business loop impracticable. Majority of the business route was replaced by NC 33, with only the stretch between Western Boulevard and Northern Boulevard downgraded to secondary road.