Australia: NSW Roads and Maritime Services (formerly RTA) has developed guidelines to minimise impacts on biodiversity during construction projects and maintenance works. The Biodiversity Guidelines: Protecting and managing biodiversity on RTA projects are intended for RMS project managers, staff and contractors (including ecologists and landscape designers). The guidelines include a chapter on managing weeds. Download the Biodiversity Guidelines at: www.rta.nsw.gov.au/environment/biodiversity/biodiversity_guidelines.html