If you come up the A75 on your way home, get off at 47 and take the D809 in to Millau.
Even better, ignore the bridge and the A75 - Le Puy-en-Velay - Langogne - Mende - Tarn Gorge - Millau - and then try to find the road to and down Col Du Vent. Spectacular views and a whole load of 2nd gear hairpins!
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