I used to live in Devonshire from 85 to 07 and traffic then was very bad.
I was close to Ewelme Rd but cars about six pm often back beyond there waiting to enter South Circular.
This was very annoying as one could not open front windows because of the noise and pollution.
Seems now reached a time to ban non locals parking there. There lazy people who drive and park to get the train bring no commercial benefit to the locals.