"A Wall In Ancient Ostia Where The Bricks Were Laid According To The Scheme Called Opus Reticulatum, With Bricks Arranged Diagonally. The Ancient Romans Knew Earthquake Tremors Were Transmitted Diagonally And This Could Cope Better Than A Horizontal Pattern"

When you take the bus, you can only go where the bus goes.
Note that the bus is traveling in a direction opposite to the direction of the congested lanes.
It's not about solutions. It's about signaling your virtue.
So, if you want to go from a to z with a bus THIS bus had to use the (often congested) a40 and a clocked bus route wasnt feasable.
the next problem in your logic is the idea that this was "new" build.
no, it was not. Back in the cold war THIS stripe of land between the two lanes could be easily converted into a make shift landing stripe for planes (you know, if the cold war would go "hot")
The only thing they did was not use it for the a40 on "special" routes, NOT for the entire a40.
Thats all, they carved out some parts of this stripe to allow buses to get from a to z WITHOUT standing in a traffic jam.
But, hey you and theodosius knew it all.
wouldnt be surprised if you are from the land of yee - haw with no idea what they are talking about.
As soon as I see "first off", I think 'Karen'.
but granted, THIS shouldnt be in a "ingenious infrastructure" picdump, was only a byproduct from the cold war.