Crossings had to be created at Mies (Vaud) and Chambésy (Geneva) so that the Léman Express could be placed in service at a frequency of every 15 minutes during peak hours, and eventually all day long (from December 2018). The capacity of the regional line between Coppet and Geneva had reached saturation point. 

The two new stops were opened in June 2018 and offer step-free access, greater travel comfort and modern installations. 

• We created two crossings at Mies and Chambésy (island platforms);
• We modernised and standardised the two train stops; 
• We then created a new cross-over on the Lausanne side of Geneva-Cornavin station;
• Finally, we modified the safety installations between Coppet and Geneva.

This project was an essential prerequisite to starting up the Léman Express service (Coppet–Geneva–Annemasse) on the Coppet–Lancy-Pont-Rouge line.

The cost was CHF 116 million.

Funding was provided by the Cantons of Vaud and Geneva and by the Swiss Confederation.