The ACT government has locked in its preferred route for the extension of Canberra's light rail to Woden, opting for the more-direct path following feedback.

The Stage 2B extension is proposed to run from Commonwealth Avenue, through the National Triangle, along the east of State Circle to Adelaide Avenue, and then on to Woden.

The project's final Environmental Impact Statement will now be lodged with the federal government and Territory Planning Authority, with an outcome expected by the end of the year.