This measure now aims to provide to Versailles Grand Parc's territory a thematic overview of intermodality in the context of a local SUMP.

The mobility law adopted in France in 2019 made it compulsory for every public institution for inter-municipal cooperation to develop and adopt a local SUMP that complies with the regional SUMP.

From 2019 until the very beginning of 2026, this obligation was put on hold while the regional SUMP was being evaluated and updated. Since 2026, however, the legal obligation has been in force, and local authorities are now moving forward with the process.

The revised IDF_01 measure specifically consists of a preliminary study on intermodality in the context of a local SUMP.