ACT Light Rail 2B has its alignment confirmed, with completion set for 2033

The ACT Government announced in May 2026 that State Circle East had been selected as the preferred alignment for ACT Light Rail Stage 2B, the nine-kilometre extension from Commonwealth Park to Woden.

That decision has been pending since 2019, when planning approval for Stage Two was split in two specifically because of the complexity of taking light rail through the Parliamentary Triangle.

Construction is not expected to commence until December 2028, with completion in December 2033.

What is being built

Stage 2B extends the line nine kilometres from Commonwealth Park to Woden, including:

• Nine light rail stops
• A new bridge over Lake Burley Griffin

• New bridges over intersecting roadways
• New pedestrian bridges
• Wire-free running — no overhead wires — through the Parliamentary Triangle

The two hard parts

The Lake Burley Griffin crossing is the headline structure. A new bridge over the lake in the middle of the national capital's designed landscape carries design, heritage and approvals constraints that have very few Australian parallels.

Wire-free running is the technically distinctive element. Operating light rail without overhead catenary through the Parliamentary Triangle — to preserve sightlines in the designed landscape — requires onboard energy storage and ground-level or inductive charging at stops. Canberra already operates wire-free sections on Stage 1, so the ACT has the operational experience; extending it across the Triangle is a larger application.

For contractors, the practical consequence is that this is not a conventional light rail package. The specialist content sits in the bridge, the wire-free traction system and the approvals process rather than in track and civil works.

The timeline is the story

Fourteen years from the planning split to completion, and roughly two and a half years from a confirmed alignment to a spade in the ground.

That is not incompetence — it is what building through the Parliamentary Triangle costs in time. The National Capital Authority, heritage protections and the designed landscape of the capital are genuine constraints, and the ACT has clearly chosen to resolve them before committing to construction rather than during it.

Whether that patience produces a better cost outcome than the projects that announced first and designed later is a question worth returning to. On the Grattan Institute's evidence, projects announced before governments were ready to commit generate the large majority of Australia's cost overruns. Stage 2B is the opposite approach.

Procurement is undecided

ANZIP records the procurement approach as "Possible PPP, unconfirmed", and rates the project a "Strong Candidate" for private capital.

No contractor has been appointed and no delivery model has been settled. With construction more than two years away, the procurement itself is the next thing to watch.

What to watch

1. The procurement approach decision — PPP, alliance or traditional — which determines who can bid.
2. EIS approval and National Capital Authority sign-off on the confirmed alignment.
3. Stage 2A progress, which is under delivery and precedes 2B.
4. A published cost estimate. None appears in the ANZIP record for 2B, which is unusual for a project with a confirmed alignment.
5. ACT Budget allocations, which have so far funded planning at $52 million a year rather than construction.

Published 21 September 2026 · Updated 23 September 2026