The crossroads in front of the main entrance of the Prévessin site will be renovated during the period between 1 May and 30 October 2017. The works will unfold in three phases.

During the first phase, from 1 May to 1 July, the networks located under the new crossroads will be moved. As a result, the main entrance of the Prévessin site will be closed for three consecutive nights from 7 p.m. to 7 a.m., from 29 May to 2 June. During these periods, alternative entrances will be available.

The roadworks will take place during the second phase, which will last from 1 July to 31 September 2017. Finally, new traffic lights will be installed by the end of October 2017. Unfortunately some disruption to the traffic flow is expected during these five months.

The new crossroads has been designed by the technical services of the French department of Ain to guarantee traffic capacity over the next 30 years, accounting for a traffic increase of two percent per year. The new design includes more lane pre-selections with a shorter traffic light cycle.