[kach22i]

Those wheel well ribs as pointed out would probably be made of a flexible material like conveyor belt material.

Somewhere a study would have to be done on cost/maintenance/friction in turns/and perhaps retractability and operable vanes/fins. Possible tire rubber wear would also be a possible liability.

Overall I like the concept and see it as a sort of rear diffuser for wheel wells.

Aside topic from paper regarding:
SECTION 5.2.1
Wake Pumping Mode...........................

Absolutely fascinating as I think anyone that has rode a motorcycle has felt their open jacket whipping about, or driven in a car with windows rolled down and suffered cabin buffeting has experienced.

I wonder if Wake Pumping Mode is what causes some hovercraft to "Porpoise", that is to say suffer from bow to stern up and down bobbing or "heave" (longitudinal instability) not caused by surface wave action but caused by aerodynamic forces.