Despatched for over 20yrs in London, and I could give chapter and verse on how and why congestion was created. In short; reduced road space; restrictions on turning; increases in signalling, and some. Between 1990 and 2000, traffic vehicle numbers did not increase, yet congestion increased many fold. Hence the Congestion Charge. It was hailed a success (temporarily), but only because the lifted all the road works in Central London on the weekend prior to the CC going 'live'.
Everywhere in the Country villages have lost their corner shops and pubs. Drink drive campaigns and the big supermarket chains in retail parks killed both. Now many of them are suffering due to internet buying, and deliveries to the door.
Too many vehicles, yes. Too many people, probably - and they're in towns. Good - stay there - don't want you on my bit of heaven!