I’m a big fan of Paris, it’s a wonderful city, but unfortunately like so many others it’s overrun by private car ownership and use despite having a brilliant public transport system. The Champs-Élysées is a great avenue and space but for most of the time it is clogged with cars. I saw Miguel Induráin win one of his Tour de France races there in the 90s, an amazing event with it is thought a million people watching. This should give you some idea of its size.
Thankfully, Paris has a visionary mayor who wants to convert the city into a city for people and she, Anne Hidalgo, has this incredible plan for the Champs-Élysées. Other cities need to start following her and start converting such places into places for the many and not the privileged few, https://www.smithsonianmag.com/smart-news/pariss-champs-elysees-get-green-makeover-180976737/?fbclid=IwAR0cj53g1eVGftGgNjb-XAiGRI572mgpFub9wtz_DIgJTN74ramvlYsWpP4.