Driving further north on Pembroke Road, we come to an area where all the parking spaces are taken. But it's still a wide road, and you can easily get up to 45 along it. No junctions, no zebra crossings, no mini-roundabouts, nothing to get in your way. Perfect. Admittedly, there's one or two bicycles to swerve past, and few schoolkids sprinting to the safety of the traffic islands, but a quick tap on your horn sorts that out.
Look in the other direction, towards the city. The roads are wide, but now there's a bus stop, a pedestrian, and a cyclist.
This leads us to our real metric of "where is there room to remove double yellow lines?" It's obvious, when you think about it.
Wherever there is room for people to cycle without getting in the way of important people in cars, there is space to add more parking.
There you have it. A nice simple metric of where we can put more parking. And its important to do this, because otherwise, the pedalling and walking factions, who are secretly defying the Waltham Forest faction in the council, would love nothing better than to put in bicyle lanes along stretches of road -and in a road this wide, they could even try segregation. Because of the double yellow lines, nobody is going to fight back to say "No! This removes the place where we have parked our car for years!"
This is why we need to Walthamize this stretch of Pembroke Road -because it is the only way we, the important people, can resist the so-called "progress" of those subversives, a progress that is really the continuation of the War On Motorists in a different disguise.