Spain's Supreme Court has dismissed an appeal by the Madrid city government against a 2024 ruling that annulled key provisions of the capital's sustainable mobility ordinance, which had established low-emission driving zones. The original ruling, secured by the far-right Vox party, struck down the zones on the grounds that the city had failed to produce adequate economic impact assessments before imposing the traffic restrictions. The Supreme Court declined to rule on the substance of the case, rejecting the appeal for lack of objective grounds for cassation — though the city argues the matter is now moot, as the local government approved a revised mobility ordinance in March 2025 that included a new economic analysis.