Paul, I will study the two links you provided, thanks
Meanwhile, I'm of the opinion that Roger believes Whitfield residents will not be accessing Dover by car, but by bus.
My experience of residents' habits in Dover and around Dover is that the vast majority would (and does) use a car.
Also, in reference to my post 86, I'll add that even if Roger were to walk along the Clarendons after 9am and before 6pm, or at any given hour of the day, he will likely see the streets packed with parked cars.
This is Dover town, where bus stops are all over the area, including the Clarendons, and where Priory train station is a mere walking distance from the Clarendons.