二級運輸主任主要負責以下職務：
(a) 管理、監察、分析和檢討公共交通服務、橋樑／隧道及停車收費錶／停車場設施、復康巴士服務和駕駛訓練服務的運作；
(b) 蒐集、更新、評估和分析所有營運／財務數據，藉以研究如何釐定公共交通服務的票價、策劃殘疾人士交通服務，以及設置停車收費錶和停車場設施；
(c) 管理各項道路交通安排和交通管理計劃，並評估新的交通管制及管理技術的效率；
(d) 處理交通及運輸緊急事故，並在緊急事故交通協調中心當值；
(e) 就部門負責的公共交通及管理服務，擬定／統籌招標工作，並評估接獲的標書；以及
(f) 就違反部門所執行的《道路交通條例》及附屬規例的事項，研究蒐集所得的證據是否可予接納／充分，並建議應採取的檢控行動；以及擬備傳票，並以檢控人身分出庭。
(註：運輸主任可能須不定時工作及執行戶外職務、輪班工作及「隨時候召」職務。)

Transport Officers II are mainly deployed on:
(a) administering, monitoring, analyzing and reviewing the operations of public transport services, bridges / tunnels and parking meter / car park facilities, Rehabus and driving training services;
(b) collecting, updating, assessing and analyzing all operational / financial data for the purpose of public transport fares determination studies, transport planning for people with disabilities, and provision of parking meter and car park facilities;
(c) administering road traffic arrangements and traffic management schemes, and evaluating the efficiency of new traffic control and management techniques;
(d) handling traffic and transport emergencies, and manning the Emergency Transport Co-ordination Centre;
(e) formulating / coordinating tendering exercises and evaluating tender submissions in respect of public transport and management services under the Department; and
(f) examining the acceptability / adequacy of evidence collected and initiating prosecution action to be taken on offences in contravention of the Road Traffic Ordinance and regulations administered by the Department; and preparing summons and appearing in court as prosecutor.
(Note : Transport Officers may be required to work irregular hours, perform outdoor duties, shift duties and “on-call” duties.)