GEG was responsible for the conceptual design and detailed design of a set of overpasses and underpasses divided into two parcels on the current A29 motorway, in the sections IC1 – IP1 (Parcel 7) and IC1 / Miramar – ER1.18 (Parcel 8).
The Parcel 7 comprises five roadway underpasses, six roadway overpasses and a small viaduct.
The Parcel 8 comprises three roadway underpasses, two roadway overpasses, two footbridges and a small bridge over the Canelas river.
The structural solutions applied in this project are the most common in this type of works: prefabricated box-culvert and a concrete structural frame for the agricultural and roadway underpasses. For the roadway overpasses, the adopted solutions were decks with prefabricated I-type beams, box girders or decks with beams concreted in situ. These decks have 2 to 3 spans. For the bridge and viaduct were used decks with prefabricated I-type beams and pre-slabs. These decks have 3 spans, between 16 and 20 m.
The footbridges comprise a steel truss span over the A29 motorway, and the connection stairs and access ramps for limited mobility.