Millau Viaduct: Spanning the Tarn Valley in Southern France

The Millau Viaduct — world's tallest bridge (343m/1,125 ft structural height) — crosses the Tarn River valley in the Aveyron department, Occitanie region, southern France.

Water Crossed

River Tarn — 380 km tributary of the Garonne, flowing from Lozère through Albi to Moissac. At Millau, it occupies a deep limestone gorge.

Areas Connected

The viaduct carries the A75 autoroute (La Méridienne) across the Tarn valley, linking:

• Millau (northwest) — subprefecture, 22,000 pop., glove/leather heritage, gateway to Grands Causses
• Saint-Georges-de-Luzençon (southeast) — village, vineyards, Tarn river access
• Peyre (southwest) — hamlet, dramatic cliff setting, historic church

Engineering Significance

Designer: Michel Virlogeux (engineer) + Norman Foster (architect)
Completed: 2004
Span: 2,460 m (8,070 ft) — 7 pylons, 6 spans
Deck height: 270 m (886 ft) above Tarn at max
Pylons: Tallest P2 = 245 m (804 ft) — taller than Eiffel Tower

Purpose

Eliminated Millau traffic bottleneck on RN9 (Paris-Béziers-Montpellier). Reduced transit time by 30-45 minutes. Catalyzed regional development. Annual traffic: 4-5M vehicles.

The Millau Viaduct doesn't just cross a river — it spans a landscape, connecting causse plateaus and transforming regional mobility.