 This four-lane upgrade was extended southward to milepost 90 (exit 89, WV 94, Marmet) in 1984.A segment between Fayette and Kanawha counties was dualized from milepost 66.51 (exit 66, Mahan) to milepost 74.96 (exit 74, Standard) in 1983.Traffic just to the west of this interchange used the two-lane Bender Bridge and Memorial Tunnel.