ANAO found that the actions taken by the Department during the course of the audit to update and improve the Notes on Administration and administrative processes, by commissioning various specialist studies and reviewing governance issues, has established a sound basis for ongoing effective management of the National Highway System. The Department advised ANAO that changes to the Notes on Administration reflect joint work done with the ANAO to identify where improvements could be made and incorporate not only suggestions and recommendations that the ANAO has made in the final report but also during the audit. ANAO considers that the comprehensive revision of the Notes on Administration undertaken by the Department should foster marked improvements in the management of the National Highway System.