Previous state
Before the intervention, the project area was a protected natural ecosystem of mud marshes, salt flats, and reed beds, and part of the Natura 2000 Network in Loures, Portugal. This estuary, an essential habitat of migratory waterfowl, is one of most important wetlands in the country, and also in Europe. In the southern part there was a landfill with invasive plants while, in the north, halophilic native species were conserved in a zone that also housed infrastructure giving access to the Tagus River.
Aim of the intervention
The project aimed to coordinate three municipalities (Vila Franca de Xira, Loures, and Lisbon) in creating a continuous route for pedestrians and cyclists along the riverbank, connecting urban zones and linking up with transport facilities. It also sought to contribute to the economic and environmental revitalisation of the area with new leisure and research spaces, and to raise awareness of the importance of estuarine ecosystems.
Description
The walkway, which is 6.1 kilometres long and 3.5 metres wide, is constructed on 4,612 pillars to an average depth of eight metres, and 192 micropillars 25 metres deep. It has ten bridges, five observation points, and fourteen shade tunnels providing information. Moreover, 1,621 trees and 41,420 native shrubs have been planted, thus helping to preserve wetland zones that are necessary for the marshes to function. All lighting is provided by photovoltaic cells.
Assessment
The project has had positive results in many aspects. In terms of mobility, it has enabled safe pedestrian and bicycle movement between nearby municipalities and urban areas. This has reduced CO2 emissions by approximately 7,417 tons per year, and has significantly contributed to regional climate goals. In the economic and recreational domain, it has benefitted some seven thousand workers in nearby companies while also offering a space of leisure for residents and visitors. In terms of environmental impact, the route draws attention to the value of natural ecosystems and promotes awareness of biodiversity. Finally, with regard to quality of life, it has improved observation of habitats, as well as protecting against flooding, and preserving wetlands. It is therefore an excellent example of how mobility, ecology, and recreational activities can be combined to transform territory in a way that is both sustainable and inclusive.[Last update: 04/06/2025]
