Millau Viaduct slightest movement in the Viaduct, and measure its resistance to wear-and-tear over time. Anemometers, accelerometers, inclinometers, temperature sensors are all used for the instrumentation network. Twelve fibre optic extensometers were installed in the base of pylon P2. Being the tallest of all, it is therefore under the most intense stress. These sensors detect movements on the order of a micrometre. Other extensometers, electrical this time, are distributed on top of P2 and P7. This apparatus is capable of taking up to 100 readings per second. In high winds, they continuously monitor the reactions of the Viaduct to extreme conditions. Accelerometers
Gault Millau after they left, Gault Millau never awarded a score of 20 points, under the argument that perfection is beyond the limitations of a normal human being. In 2004, two restaurants, both of chef Marc Veyrat, the Maison de Marc Veyrat (or L'Auberge de l'Eridan) in Veyrier-du-Lac near Annecy and La Ferme de Mon Père ("My Father's Farm") in Megève, received this score. To some, this reflects a fall of standards in the guide after it changed from employing a permanent editorial and tasting staff to using local agents. There has been discussion about which guide is more important, the Michelin