You'd be wrong. 1.2 cars per adult across the UK, 0.74 in London. Car use falling in London, growing across the UK, especially in the North East.
Good luck with trying to convince anyone that traffic in London is not among the heaviest in the country.
Perhaps my observation of using the Chelsea tractor to cross the road has some merit.
I recall the residents of North End Road in Fulham complaining of the traffic, claiming lots of drivers were using it go from Wales to Dover and other long journeys.
A traffic survey found 90% plus of the journeys were local.
Similarly, a friend of mine lived in Cheam in Surrey.
The locals complained of drivers hammering through their district on their way to the south and south west.
The police mounted a speeding operation and published the results - the overwhelming majority of the speeders had addresses within the borough.