Major road building schemes, including the Stonehenge tunnel and the Lower Thames Crossing, are being threatened by a legal challenge.
High Court papers have been filed against the Department for Transport that could force the government to scale back plans to spend £27bn on motorways and A-roads.
The challenge argues that existing roads policy — agreed in 2014 — fails to consider more recent legally binding targets to reduce carbon dioxide emissions. This includes a commitment made under the Paris Agreement to cut carbon by 68% by 2030 based on 1990 levels.