政府車輛事務經理的主要職責為— (a) 協助制訂管理政府車隊及提供運輸服務的策略，以及就部門車隊管理進行檢討； (b) 監督為各部門提供的運輸服務，並給予意見，以及管理供各部門租賃車輛服務的合約； (c) 籌劃及協調政府車輛的採購，並管理用於採購一般用途車輛的一筆過撥款； (d) 籌劃及管理政府車輛司機的培訓及考試計劃，並就處理涉及政府車輛的交通意外提供指引；及 (e) 協助管理政府車輛事務主任和司機職系。

A Government Transport Manager is mainly deployed on – (a) assisting in the planning of strategy for the management of government vehicle fleet and delivery of transport services, and conducting review of departmental fleet management; (b) overseeing the provision of land transport service and providing advice to departments, and administering contracts for hiring of vehicles by various departments; (c) planning and co-ordinating the procurement of government vehicles and managing the block vote for procuring general purpose vehicles; (d) planning and administering the training and testing programmes for drivers of government vehicles and providing guidance on handling traffic accidents involving government vehicles; and (e) assisting in the management of Transport Services Officer and Driver grades.