Another option is to make the elevated guideway turn into a reversible Bus Rapid Transit expressway or reversible High Occupancy guideway with exits and entrances at Aiea and Pearl City for buses or high occupancy vehicles headed West to Waikele and beyond and Waipio and beyond.
Plus it is high time in this the 21st Century to relieve congestion on Dilingham, Nimitz and other Honolulu arterial streets thru employment of modern technology and innovation (Adaptive Traffic Signal System) with the help of funding from the Federal Highways Administration (FHWA).
Congestion relief with this technology has been accomplished in cities such as in Lebanon, Pennsylvania; Bellevue, Washington; Austin, Portland;  or states such as Utah, Minnesota and Florida.
The city Department of Transportation Services announced last year (2015) that it was going to test on Oahu streets employment of this technology called Adaptive Traffic Signal System.