The new Welsh Transport Appraisal Guidance (WelTAG) – https://beta.gov.wales/welsh-transport-appraisal-guidance-weltag – enables transport solutions which are low-or zero-carbon, mitigate air pollution, accelerate the green economy and otherwise meet the sustainable development principle of the Well-being of Future Generations Act.  Sophie Howe, Future Generations Commissioner, has welcomed the revised guidance.