This unit describes the skills and knowledge required to operate truck or trailer mounted attenuators when carrying out traffic management activities in civil construction. It includes planning and preparing, using radio communication, operating and positioning truck or trailer mounted attenuator, using traffic controls, and cleaning up.It applies to those working in operational roles. They generally work under minimal supervision to undertake a broad range of tasks in varied work contexts, using some discretion and judgement in selecting equipment, services or contingency measures. Licensing, legislative and certification requirements that apply to this unit can vary between states, territories, and industry sectors. Users must check requirements with relevant body before applying the unit.