Paris has implemented significant measures to reduce vehicle traffic in the city as a means to combat air pollution. The city has banned older diesel cars, particularly those classified as Crit'air 3, 4, and 5, while also reducing parking spots and expanding bike lanes and green spaces. These initiatives have led to a notable improvement in air quality, as evidenced by pollution maps. However, there are still many cars, including diesel-powered vehicles, on Paris streets. Some commenters express a desire for similar changes in other cities, highlighting that a complete ban may not be necessary, and exploring alternatives such as emissions testing and low-emission vehicle policies could be effective solutions. The mix of comments reflects an ongoing debate about the best methods to balance transportation needs and urban air quality, with suggestions ranging from outright bans to more moderate regulatory approaches.