Ter highway: The highway between the mountain and the river

The Ter Axis concession includes management of the 48.57 km-long highway that links the Centelles Sud interchange with Ripoll.Cedinsa is responsible for the construction, financing and operation of the highway built on the old C-17 that links – from south to north – the towns of Vic, Sant Hipòlit de Voltregà, Torelló, Sant Quirze de Besora, Montesquiu, Les Llosses and Ripoll, mainly following the Ter river valley.

285 million euros

Initial investment

60,2 million euros

Own capital

225,1 million euros

Bank financing

Works Executed

This was a job of great technical complexity since we had to fit the highway between the mountain and the river. It was made possible by means of large cuttings in the living rock, viaducts over the river, walls on the watershed, major embankments and eight tunnels with a total length of 4.5 km.

25 km

conversion of existing road to dual carriageway (Masies de Voltregà - Ripoll)

23 km

starting from scratch (Centelles – Masies de Voltregà)


new viaducts (La Mambla, l'Espona, Riera de Cussons)


new tunnels (4,481 m)


new interchanges

Infrastructure in service

The impact of the project is reflected in enhanced traffic safety and a reduction in congestion today’s C-17. And due to the fact that it is located in central Catalonia where good road connections are rare, the project is having an impact on the economic growth of the hinterland.

48 km

of highway




retaining walls


tunnels and cut-and-covers (6,352 m)


interchanges and semi-directional interchanges

Outstanding works

  • Mixed structure (O.F. 3.1 viaduct). Located at kilometre 70 + 405 it has a deck length of 291.5 m and a width of 24 m. This viaduct enables the bypass to cross the river Ter for the second time. The bridge consists of a mixed structure made up of by two steel box girders topped by a 30 cm-thick concrete slab. The height of the 1.7 m-diameter piles varies between 11.11 and 17.24 m. It must be kept in mind that seismic effects were important conditioning factors in the selection of support systems.
  • Tunnels The successful execution of 8 completely new tunnels in the Pyrenees foothills deserves special mention due to the extremely variable nature of the terrain to be excavated. The St. Quirze, Ginestet, Codines, Montesquiu and Bellavista tunnels traverse the entire Puigsacalm geological formation.
  • Ripoll wall This 560-metre-long wall located between kilometres 12 + 921 and 13 + 410 of the Ripoll highway has a maximum height of 16 metres. It is designed as a variable-height T-type retaining wall. The dimensions of the wall’s component parts are adapted according to the height: heights of less than 11 m, heights of less than 14 m and heights of less than 16m. Except for the first three modules that rest on the existing embankment the wall’s foundations are embedded in the rocky substrate.

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