We invite you to bring your bold ideas and big dreams and become part of a global team of over 50,000 planners, designers, engineers, scientists, digital innovators, program and construction managers and other professionals delivering projects that create a positive and tangible impact around the world. LADOTD ATSSA Flagger & Traffic Control Supervisor Certifications and Completions of the Traffic Engineering Process & Reporting (TEPR) Modules 1,2 and 3. Experience designing highway/roadway systems, drainage systems, and traffic control plans.