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
Millau the Viscount of Millau. In 1187, the King of Aragon grants him the seal and communal freedom of Provence by Consular Charter. A consulate was thus created, and was responsible for administering the city to raise taxes and to apply justice. In 1271, Millau passed to the crown of the kings of France. In 1361, during the Hundred Years War, the city came under English rule. The return to peace in the fifteenth century gave the city a boost. It is Louis XI which connects Millau to the crown in 1476 by letters patent. In the Middle Ages the town