Background
The Swedish Transport Agency (Trafikverket) approved a road plan in November 2022 for Road 259, Tvärförbindelse Södertörn, a new cross-connection motor road in the greater Stockholm region. The project involves constructing a partially new route between the E4/E20 highway at Vårby and Road 73 at Jordbro. The new section includes a tunnel through Masmoberget mountain and beneath Glömstadalen valley and Flemingsbergsskogen forest. The road was designed as a dual-direction motor highway with two lanes in each direction, operating at speeds of 80–100 kilometers per hour.
The Government (Ministry of Rural Affairs and Infrastructure) modified the Transport Agency’s decision in January 2024, expanding noise protection measures to additional properties but otherwise affirming the road plan. Eight applicants—three individuals and five environmental organizations, including the Swedish Society for Nature Conservation (Svenska Naturskyddsföreningen)—sought judicial review by the Supreme Administrative Court, challenging the decision on fourteen separate grounds.
The Court’s Holding
The Supreme Administrative Court rejected all challenges and upheld the Government’s decision. The court refused Svenska Naturskyddsföreningen’s request for a preliminary ruling from the European Court of Justice. On the substantive questions, the court found no legal violations. Regarding noise pollution, the court held that baseline noise standards (such as 55 dB equivalent sound level at building facades) are guidelines, not legally binding requirements. The court confirmed that noise calculations were not shown to be incorrect or manipulated, and noise-mitigation measures consisting primarily of highway-adjacent barriers with supplemental property-level protections were reasonable.
On climate law claims, the court interpreted Sweden’s Climate Act as establishing a policy framework for governmental action, not specific legal constraints on individual infrastructure decisions. Citing the European Court of Human Rights’ 2024 decision in *Verein KlimaSeniorinnen Schweiz v. Switzerland*, the court found that states have significant discretion in selecting concrete measures to achieve established climate targets, provided those targets themselves are adequate. The court deemed the road project—which the Transport Agency concluded would improve goods transport efficiency and not undermine climate goals—to fall within that discretion. The court applied the same reasoning to reject claims under Article 8 ECHR (right to private and family life) and Article 7 of the EU Charter of Fundamental Rights.
The court found no adequate grounds to overturn the Government’s decision under the Environmental Code’s general duty-of-care principles, land-use principles, or the “stop rule”—a provision allowing the Government to prohibit activities threatening substantial harm to public health or environment when precautionary measures prove insufficient. Although the Transport Agency and Government did not explicitly invoke the stop rule, the court held that omission did not require reversal; the rule grants significant discretion, and nothing showed the Government misapplied it. Applicants’ objections regarding conflicts with local zoning plans, alleged bias, and other procedural matters likewise failed under the court’s limited standard of judicial review.
Key Takeaways
- Swedish courts grant substantial deference to government and agency discretion in major infrastructure decisions, even where significant environmental objections are raised.
- Noise guidelines in environmental permits are not legally binding standards; exceedance of recommended levels does not automatically render a project unlawful.
- Climate law establishes targets and general policy direction but does not constrain the choice of specific transport infrastructure measures to achieve those targets.
- Environmental organizations have legal standing to challenge infrastructure projects, but must meet a high evidentiary threshold to show legal error on judicial review.
Why It Matters
This decision resolves a high-stakes dispute between environmental protection and transport infrastructure development in Sweden’s largest metropolitan region. The ruling clarifies that national climate law, while ambitious in its goals, does not authorize courts to second-guess governmental judgments about which concrete projects best serve those goals. This has immediate significance for major infrastructure proposals facing environmental opposition across Sweden and potentially throughout the EU, particularly where climate and environmental arguments are raised against transport projects.
The decision also demonstrates the limits of private rights and collective environmental standing under European human rights law. Although the European Court of Human Rights has recognized a positive obligation for states to protect citizens from serious climate impacts, the Swedish court’s interpretation—confirmed by the European precedent—is that this obligation focuses on the adequacy of overall climate policy targets, not on individual project approval decisions. For practitioners and project developers, the ruling suggests that rigorous environmental impact assessment and compliance with procedural requirements may be sufficient to withstand judicial challenge, even where a project imposes substantial local environmental costs.