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WHITE LINE: The first of two elegant white concrete viaducts for the TGV Mditerrane across the Rhone upstream from Avignon was completed this week. The curving, rising line of 11, 100m long glued segmental concrete spans lifts the rail from the plain to a high point on the opposite bank.

The viaducts, being built by a joint venture between GTM Entrepose and Bouygues, are the most complex structures on the new line which will link Valence, south of Lyon, to Marseille, and on to Montpelier.

Specially blended concrete will match the white cliffs on one side of the river on the first segmental structures to be used for high speed rail. The main viaduct is made from 300 segments each up to 8.5m deep and130t in weight. All have been positioned with a gantry first used on the Second Severn Crossing.

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