4A e 4B Viaducts The 4A and 4B viaducts cross the “Travesso” Valley near the “Coimbra” North interlink node with the A1 Motorway.

Both viaducts have end spans of 24.0m and current spans of 30.0m. The V4A viaduct is constituted of “A” and “D” branches, where the “A” branch has a total length of 588.0m. The V4B viaduct is constituted of “B” and “F” branches, the “B” branch being 708.0m long.

The decks are a two beam-and-slab shaped girder without cross-beams and are supported by pile/piers of 1.80m diameter.

Construction was completed in 2002.
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