This approach is part of a metropolitan framework: the entire perimeter delimited by the A86 motorway (A86 excluded) is affected by the same traffic restrictions. The establishment of the metropolitan Low Emission Zone was also made compulsory by the Mobility Orientation Law of December 2019.

This new phase that started in June 2021 was subject to a consultation of institutional partners in March and April 2021 and of the public in March 2021, a coordinated consultation for all the municipalities concerned by the Greater Paris Metropolis.