Complex sentence: The construction of the interchange became necessary when the Kwame Nkrumah Circle, which handles over 84,000 vehicles from the arterial roads and ther intersections daily, could no longer ensure effective and efficient tackling of the traffic congestion challenges.
Split into simpler sentences: The construction of the interchange became necessary when the Kwame Nkrumah Circle, which handles over 84,000 vehicles from the arterial roads and their intersections daily. The current roads could no longer ensure effective and efficient tackling of the traffic congestion challenges.