In order to satisfy the need for acoustic and visual privacy near motorway corridor, the implementation of a plant screen has proven to be an innovative landscaping solution near the Laurentian expressway (A-15) in the area of Sainte-Rose in Laval, Quebec. To meet the acoustic performance requirements established during the draft phase, we raised a 6-meter noise protection wall on the embankment, comprised of a solid structure topped with willow branches. The wall has a total length of 400 meters. Some 40,000 shoots of European willows were planted along the structure. This esthetic, sustainable and inexpensive solution brightens up the highway landscape and is an inventive way to meet current practical needs.
As the principal contractor, the overall planning of the project was our responsibility. Our objectives were:
- Reduce the visual and acoustic impact of the expressway corridor near homes.
- Promote an approach that favours both ecology and sustainable development.
- Find an alternative solution to the traditional concrete wall (reducing heat islands, vandalism and graffiti).
- Develop a sound barrier concept made of resistant material and viable plants.
- Develop a concept within an attractive budget framework.
A living noise barrier allows for easy integration of various types of plants. This innovation remains at the forefront in terms of design and this technique could solve many urban issues linked to acoustic and esthetic nuisance. It is an intelligent solution that limits the negative impacts of an incompatible cohabitation between residential areas and expressway corridors.
Our project, a first in Quebec, is based on the theoretical and practical research on the use of willow shoots developed by the CERVEAU (Centre d’expérimentation et de recherche sur les végétaux pour l’environnement et l’aménagement urbain) project as well as by the PBRI (Plant Biology Research Institute). Beaupré & Associés Experts Conseils inc. is the proponent of the design and implementation of acoustic plant screens in Laval, who’s project, along the Laurentian expressway, is one of its great successes.
