Viaduc autoroutier de Montesson

About

The Montesson viaduct or Montesson viaduct in the short version, also known as the Mesnil-le-Roi viaduct, is a French viaduct located between the municipalities of Montesson and Mesnil-le-Roi, in the Yvelines department allowing the A14 motorway to cross the Seine below the large terrace of Saint-Germain-en-Laye. The western end of the viaduct is directly connected to the Saint-Germain tunnel.