The term 'WORK A SHUTTLE' is a job description that can be summarized as operating a shuttle vehicle. The acronym TAT stands for 'Transportation and Ticketing', which is the department responsible for providing transportation services to passengers. This job involves driving a shuttle vehicle, such as a bus or van, to transport passengers from one location to another. It also involves ticketing services, such as issuing tickets and collecting fares. The job requires excellent customer service skills, as well as knowledge of safety regulations and traffic laws.