Thanks OD for the links!
Nevertheless, west of Grandview, the "core lane" cross-section will still comprise ONLY 6 THRU lanes.
I reckon that the section between 1st Ave and Boundary Road should be 6-lanes + 2 auxilary lanes for merging (extended between both interchanges) and that concept is still not contemplated in the preliminary design.
Currently, in both directions, traffic slows down too quickly (seeing brake lights are common) due to the close proximity of the on/off ramps of the closely spaced interchanges with the concurrent weaving.
That area, west of Grandview, likely comprises the closest spaced array of interchanges/on-off ramps along the entire system. And that always spells potential trouble (ie. potential accidents) unless appropriate design modifications are implemented.
Typically that could involve some stepped-down form of c/d system albeit additional auxilary lanes will probably suffice in this instance.
Hopefully, further design modifications will be made as we've seen with the SFPR.