Executive Summary

On 13 May 2026, the Federal Council adopted amendments to the Transport Master Plan, Part Road Infrastructure (SIN). The changes include simplifications of the concept section as well as updates to three motorway junctions and one road cover: N2 junction Altdorf-South, N2 junction Sigirino, and N12 cover Chamblioux. The SIN serves as a central planning instrument for national roads and will coordinate future construction projects spatially with other projects. The amendments are based on the Transport Master Plan Part Programme revised in 2021 and take into account statements from the cantons.

Persons

  • Federal Council (collegiate body; decision-maker)

Topics

  • National road network
  • Spatial planning
  • Transport policy
  • Infrastructure planning

Clarus Lead

The revision of the SIN signals a continuous adaptation of national road planning to changing spatial planning and transport policy requirements. By simplifying the concept section and updating specific projects, the Federal Council strengthens the coordination function between federal and cantonal planning levels. The temporal proximity to the mandate given to UVEK for the "Verkehr '45" programme – a comprehensive coordination of road, rail, and agglomeration transport by end of June 2026 – shows that the SIN amendments are part of a broader modernization of transport planning.

Detailed Summary

The Transport Master Plan, Part Road Infrastructure, was originally adopted in 2018 and has been subject to regular reviews since then. The planning instrument reserves land long-term and coordinates construction projects such as new junctions, road covers, wildlife crossings, and heavy goods traffic facilities. The current amendments reflect the changes made in 2021 to the overarching Transport Master Plan Part Programme and integrate new findings from spatial planning, environmental and transport policy.

The three updated projects – two junctions on the N2 (Altdorf-South and Sigirino) as well as the N12 cover Chamblioux – have already been approved by the Federal Council and included in the SIN. According to the Federal Council, there is no direct connection between these projects and the Strategic Development Programme for National Roads (STEP) or the "Verkehr '45" programme. The STEP contains specifically planned and prioritized expansion projects, whose realization and financing are decided by Parliament. The cantons were invited to comment; according to the Federal Council, their statements were largely taken into account.

Key Messages

  • The Federal Council has adapted the central planning instrument for national roads (SIN) in three areas: concept section simplified, two N2 junctions and one N12 cover updated.
  • The SIN coordinates construction projects spatially with cantonal and municipal projects and reserves necessary land long-term.
  • The amendments integrate transport policy changes from 2021 and pave the way for the "Verkehr '45" programme, which will jointly prioritize road, rail, and agglomeration transport in the future.

Critical Questions

  1. Evidence: What specific spatial planning or transport policy findings from the 2021 revision of the Transport Master Plan Part Programme led to the simplification of the SIN concept section? What data supports this simplification?

  2. Conflicts of Interest: Which cantons commented on the SIN amendments, and were there divergences between federal and cantonal positions? How were conflicts resolved?

  3. Causality: Why are the three updated projects (Altdorf-South, Sigirino, Chamblioux) classified as not relevant with respect to STEP and "Verkehr '45", even though they are national road projects? What criteria determine this classification?

  4. Feasibility: What timeframe is planned for the realization of the three updated projects, and what financing mechanisms are provided for them?

  5. Coordination: How does the Federal Council ensure that the SIN amendments remain compatible with the "Verkehr '45" requirements to be developed by June 2026?

  6. Land Reservation: For which land areas were reservations newly established or changed through the SIN amendments?

Source Directory

Primary Source: Federal Council Adopts Amendments to Transport Master Plan, Part Road Infrastructure – news.admin.ch, 13.05.2026

Supplementary Resources:

Verification Status: ✓ 13.05.2026

This text was created with the support of an AI model. Editorial responsibility: clarus.news | Fact-check: 13.05.2026