For three years; frustrated motorists using the A75 motorway in France have been tantalised by progress on Europe's largest civil engineering project. The drive from Beziers in the south starts out well enough, as you hurtle northwards through mountain scenery. Frustration sets in 19 km south of Millau as the motorway empties its traffic onto the equivalent of an A road and you slow to a grinding crawl - it can take up to three hours to get through the town and back on to the A75 north of town. Eventually, however, the road dips and rounds a corner to reveal a vast panorama: a huge 2.5 km wide valley slices deep between two elevated plateaux and a nearly completed motorway viaduct strides across the void.
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