Voies couvertes

Under the slab, 14 covered lanes, including two main routes (the Builders' lane and the Sculptors' lane), are to undergo a facelift to bring them up to standard.

Objectives:

• Make the Bâtisseurs and Sculpteurs-Pyramides (BSP) lanes safer.
• Integration of soft modes: pedestrians and cyclists (BSP)
• Improve the quality of life of the lanes by creating a bright, light-filled environment
• Improvement and optimisation of logistics flows
• Increased cross-connections between the Sculpteurs-Bâtisseurs lanes to ensure the cohesion and permeability of the whole area
• Modification of the road network
• Entrances to the covered lanes must be of a high quality.

The voie des Sculpteurs is a 650 m tunnel, while the voie des Bâtisseurs is 725 m long. These two main routes serve 25 towers. Now largely used by vehicles, the public body Paris La Défense is urging the towers to review their layout and entry points so that cyclists can find their way around, with services such as secure parking, lockers and even showers at the foot of the towers.

This project provides an opportunity to revamp the underground routes, making them more pleasant and bringing them closer to the status previously attributed to the surface. In other words, the underground routes will no longer be transit zones, but pleasant, safe, clear spaces that cyclists and pedestrians can use. This will also avoid the conflicts of use that have become all too common on the slab.

An investment of 100 million euros is planned for the redevelopment of these areas. The project is ambitious, and could see the creation of delivery and waste collection zones, dedicated two-way cycle paths, the development of plazas, and the formwork of ceilings to improve aesthetics. The project also includes the creation of hoppers to allow air to circulate and natural light to penetrate, as well as the creation of a light trail with colour codes to help you find your way under the slab... it's an ambitious project.

From a more general point of view, this project aims to improve the safety of users and preserve activities in the event of fire in the lanes. In addition, these regulatory interventions will make it possible to take action on the urban level by introducing pedestrianisation and soft mobility (bicycles) in the covered lanes.

An investment of 100 million euros is planned for the redevelopment of these areas. The project is ambitious, and could see the creation of delivery and waste collection zones, dedicated two-way cycle paths, the development of plazas, and the formwork of ceilings to improve aesthetics. The project also includes the creation of hoppers to allow air to circulate and natural light to penetrate, and the creation of a light trail colour-coded to identify the location under the slab......, the project is ambitious.

From a more general point of view, this project aims to improve the safety of users and preserve activities in the event of fire in the lanes. In addition, these regulatory interventions will make it possible to intervene on the urban level by introducing pedestrianisation and soft mobility (bicycles) in the covered lanes.

Bringing in natural light: creating ventilation shafts

To support the use of the lanes by soft modes of transport, the project includes four openings (also known as hoppers) in the slab that will contribute to the installation of natural ventilation, thereby improving the safety of the structure in the event of fire. These four new openings, distributed along the voie des Sculpteurs, will complement the existing openings.

The 4 hoppers will be located at the Agam basin, at the foot of the Ariane and Total Energies towers, and at the Adagio La Défense Esplanade aparthotel.

Before 2019, around 600 cyclists crossed the Pont de Neuilly every day. By 2020, there will be 6,000. While they were initially offered a route with "coronapistes" and a guide on the slab (a green stripe drawn on the ground to bring them together), it is now time for the public establishment to send this mode of traffic back under the slab, by offering cyclists safe and efficient exclusive right-of-way facilities. This period has shown that these facilities work, and that they should be made permanent.

Duration of works 31 months :

• Integration and availability of the Bâtisseurs tracks from 2024 as part of the Olympic Games.
• Completion of the Bâtisseurs track in 2025.
• Completion of the Sculpteurs and Pyramides tracks in 2026.

Did you know?

Before 2019, around 600 cyclists crossed the Neuilly Bridge every day. By 2020, there will be 6,000!