From this Tuesday, November 5, 2024, the speed limit will be reduced to 70 km/h on two main roads in the Paris region: the A86 between Saint-Denis and La Courneuve, and the A4 between Saint-Maurice and Charenton-le-Pont. This measure, similar to that on the Paris ring road, is designed to reduce noise pollution. The experiment will run for a year, with surveys carried out by Airparif and Bruitparif to measure the effects on local residents' quality of life.