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Luxembourg bets on areas already connected to highways to expand solar energy without occupying new land, using acoustic barriers, parking lots, and side lanes in a strategy that brings transport infrastructure closer to renewable generation.
On February 26, 2026, Luxembourg advanced in discussing a bill that allows the installation of photovoltaic panels in areas near highways, including side lanes currently subject to construction restrictions.
Presented in the Chamber of Deputies, the proposal seeks to use spaces already linked to road infrastructure to expand solar generation, without relying on the opening of large areas exclusively for power plants.
Unlike photovoltaic pavement experiences, the measure does not transform asphalt into a solar surface exposed to the daily traffic of cars, buses, and trucks.
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In this model, the focus is on road edges, acoustic barriers, parking lots, embankments, fences, and nearby land, where the modules can operate without directly receiving the weight and wear of vehicles.
Solar potential on Luxembourg’s highways
Commissioned by Luxembourg’s Ministry of Economy to the offices Goblet Lavandier & Associés and BEST, the feasibility study analyzed highways A1, A3, A4, A6, A7, and A13.
The assessment identified 65 points with potential for installing 104.5 MWp, with 42.3 MWp classified as priorities for possible implementation.
In addition to specific locations, technicians also evaluated side lanes up to 200 meters along the country’s main road axes.
In this expanded area, the theoretical potential reaches 820 MWp in the 0 to 100-meter range and 792.8 MWp between 100 and 200 meters, totaling about 1.6 GWp before real feasibility stages.
In practice, this volume does not mean that all areas near highways will be covered by solar panels in the short term.
Execution still depends on land ownership, territorial acceptance, visual impact, electrical connection, and the possibility of combining solar generation with agricultural activities in certain sections.
Highways become an alternative to the lack of space
Behind the proposal is a common limitation in small, densely populated countries: the competition for available space for new energy projects.
Luxembourg needs to expand renewable production to meet its climate goals, but each area dedicated to solar energy competes with agriculture, urban expansion, infrastructure, and environmental protection.
In this scenario, highways emerge as corridors already modified by human action, with support structures and protection strips that rarely receive other productive use.
Around the tracks, there are parking lots, roofs of technical buildings, noise barriers, fences, embankments, and safety areas with limited use for other purposes.
This type of choice reduces the pressure for entirely new land and takes advantage of surfaces already integrated into the transportation system.
The survey also considered impermeable or artificialized areas, such as parking lots and rooftops, which do not have the same ecological value as natural zones.
In these locations, installation tends to be simpler from an environmental point of view and can still benefit from nearby electrical networks.
Legal change to release solar panels
To unlock part of this potential, Bill 8675 aims to create specific conditions to authorize photovoltaic installations in the so-called non-building zone.
This 25-meter strip along the highways is usually reserved for possible road expansions and, by rule, imposes restrictions on new constructions.
According to the Chamber of Deputies of Luxembourg, the proposal does not automatically allow the installation of panels on all sections of the road network.
The goal is to create a legal basis for projects to advance later, provided they meet technical requirements, safety criteria, and reversibility rules.
With the inclusion of the non-building zone, the theoretical potential in the strip up to 100 meters would increase by 109 MWp, equivalent to about 15% compared to the area analyzed without this restricted strip.
This increase helps explain why the legal adjustment has become an important step within the solar strategy associated with highways.
Acoustic barriers and solar parking lots
Among the most relevant applications, the study mentions vertical installations on noise barriers and fences, as well as inclined systems on embankments and side areas.
These solutions take advantage of linear structures already integrated into the highway and allow testing of technical arrangements without directly interfering with vehicle circulation.
On noise walls, the same structure used to reduce the sound impact of traffic can receive photovoltaic modules, provided there is adequate solar orientation, stability, access for maintenance, and electrical connection.
Projects of this type have been indicated as useful for evaluating technical solutions and improving coordination between different bodies involved in infrastructure management.
Another practical front involves parking lots, especially those used for integration between individual and collective transport.
With solar covers, these paved areas can generate electricity, protect vehicles, and take advantage of surfaces exposed to the sun for much of the day.
Difference in relation to solar asphalt
By prioritizing lateral structures, Luxembourg distances itself from projects that attempted to place panels directly on the road pavement.
This choice avoids problems associated with the constant weight of vehicles, braking, dirt accumulation, shading, and mechanical wear of the modules.
Even off the track, installations in a road environment require specific care in planning, operation, and maintenance.
The study mentions sensitive points such as the occupation of safety lanes, access for technical teams, dirt on the panels, and compatibility with the operating rules of the road network.
The connection of the proposal with national energy and climate goals also weighs in the planning.
The report cites Luxembourg’s goal of reaching 37% renewable energy in gross final consumption by 2030, while the installed photovoltaic power in 2024 was 493 MWp, with a production of 295 GWh.
With this strategy, highways are no longer seen merely as circulation corridors and become part of a broader discussion on energy infrastructure.
Luxembourg evaluates its surroundings as assets capable of producing electricity, provided that the implementation respects road safety, territorial planning, and proper connection to the grid.
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