As a traffic signal technician, you install and repair traffic control equipment. You maintain electrical systems and microprocessor-based controllers including relays, wiring, conflict monitors, signal suspension cables, poles, communication modules, underground conduits, related lighting, and vehicle detectors. You handle calibration, troubleshoot circuit boards, run diagnostic tests, analyze data of traffic flow and design timing of signal control devices. You also review inventory to ensure you have the tools and replacement parts needed. A traffic technician works independently and reports to administrative management.