Place du Guesclin (as part of the BHNS TEO project in St-Brieuc)
2 250 000 €
Place du Guesclin, in the city center of Saint-Brieuc, has undergone a major redevelopment in connection with the arrival of the High Service Level Bus (BHNS, TEO project). This square, with important automobile traffic, was divided in two by a hopper and a so-called "gendarme's hat" footbridge.
The demolition of the hopper was a sensitive operation, right in the city center, and emblematic of the transformation of public spaces in Saint-Brieuc. After its demolition, the hopper had to be backfilled. The originality and circularity of the project consisted in backfilling the hopper with materials from the deconstruction of the neighboring Ernest Renan high school.
In addition, this project stands out for the quality of the involvement of stakeholders, residents and users. An important participatory approach made it possible to anticipate and reduce nuisances upstream of the worksites, and to involve the inhabitants during the construction phase, for example with the Street Art workshop organized before the demolition of the footbridge.
- Public spaces
- Operational phase
- Quality of life
- Economic development
Christophe Ehanno (EGIS)
Type of territory
Saint Brieuc is the center town of a booming agglomeration of 32 municipalities and 150,000 inhabitants. Saint Brieuc is the capital of the Côtes d'Armor department.
Public spaces area
6 000 m²
Representative of the project management group
Company holder of the Deconstruction batch
Saint Brieuc Armor agglomeration community
Company holding the Asphalt batch
Quality of life / density
Place du Guesclin is located in the city center of Saint-Brieuc. Before the high-level bus project, it was a degraded public space, suffering from the predominance of automobile traffic, with a pedestrian bridge known as "the police hat" containing asbestos.
The arrival of BHNS TEO is an opportunity to gradually requalify the entire public space by rebalancing spaces for pedestrians, soft mobilities, public transport and cars. The project also made it possible to destroy the footbridge and evacuate the presence of asbestos.
Culture and heritage
cf. chapter on social inclusion
Social inclusion and safety
Before the deconstruction site, those involved in the TACT by Egis approach brought up the idea of organizing Street Art workshops and an event on and under the footbridge to be demolished.
The inhabitants remember this strong moment of transformation of the city: https://www.letelegramme.fr/cotes-darmor/saint-brieuc/place-du-guesclin-chapeau-les-artistes-07-07-2018- 12020665.php
Reuse of materials
The reuse of high school deconstruction materials was offered by the company Nicol Environnement during the work preparation phase, in order to reduce the schedule due to the proximity of the "extraction site '', the Ernest Renan high school, 500 meters from Place du Guesclin. The company was also the holder of the high school deconstruction contract.
100% of the 3000 m3 to be backfilled came from the Ernest Renan high school.
Reused material: Stonework Granulometry + -: 0/100 mm
The re-employment had several advantages :
- Thanks to the reduced transport time between the two sites, the work schedule, very constrained, could be respected
- The company's works contract ended with a capital loss on the price of backfill of around 13,000 euros (for an initial contract of 335,000 euros), ie -4%. The loss could be passed on to other interventions, thus contributing to better control of the overall budget of the operation.
The traceability of this exemplary operation was ensured by the company's transport tracking between the two sites. There was no storage problem because the material was extracted on the Lycée site and implemented immediately (transport time of 15 minutes).
In addition, Eurovia, the company holding the market for the laying of asphalt, was able to reuse, after decontamination, planing and recycling, 20% of the asphalt present on the site (including on the BHNS project).
Replicability and Innovation
The re-employment approach was proposed by the company during the preparation period, after the call for tenders. The MOA had already done this type of practice.
This re-employment experience was made possible thanks to the concomittance of two projects carried out by the same company. While companies have long practiced optimizing the flow of materials between their sites, these practices can now be organized more upstream by the contracting authorities themselves, with the help of project managers.
It is an opportunity to "scale up" the re-employment, through a better overall knowledge of the planned sites and the materials involved, within and between several owners of a territory. To do this, a company like Egis can help, by setting up an information system and facilitating the exchange of information between stakeholders. Egis thus supported other re-employment initiatives in two eco-district projects: Rouen Flaubert and Les Fabriques in Marseille. In the building sector, Egis went beyond the exchange of information by delivering a material exchange platform, Cycle Up .
The redevelopment of the square is being carried out as part of the BHNS TEO (Transport East West) project. This is an ambitious project for the development of public transport in the center of Saint-Brieuc.
It is also a global development program which contributes to the modernization and the dynamics of the city center of the agglomeration, like the place of Guesclin.
The route corresponds to that of the busiest line of the Briochin Urban Transport network (TUB), line A. Daily, line A carries 6,000 to 6,500 travelers, or 25% of the people who take the bus.
The TEO project will optimize the transport network, since the traffic lanes dedicated to TEO will benefit line A, but also other structuring lines of the TUB network. Thanks to its regularity and its comfort, the TEO line will offer an alternative to the use of the private car with a cadence of 8 minutes.
Project video: https://vimeo.com/385511406 (4'30 '')
- Soft transportation
Reasons for participating in the competition(s)
- L'originalité et la circularité du projet ont consisté à remblayer la trémie par des matériaux issus de la déconstruction du lycée Ernest Renan voisin.
- Une importante démarche participative a permis d'anticiper et de réduire les nuisances en amont des chantiers, et d'impliquer les habitants pendant la phase chantier
- Le projet a aussi permis la requalification de l'ensemble de l'espace public en rééquilbrant les espaces pour les piétons, les modes doux, les transports en commun et les voitures