Guidance and services

Policy and background Includes strategy, reports, projects and assessments.

  • Policy and strategy
    To reduce nitrogen dioxide pollution we are reducing speed limits and making other changes on some roads on a trial basis.
  • Policy and strategy
    How we will reduce concentrations of nitrogen dioxide around roads where levels are above legal limits.
  • Policy and strategy
    The regulations that relate to the measurement, assessment and management of ambient air quality.