Traffic signal technicians build and maintain traffic signal systems of all kinds. They must remain alert; aware of the many hazards associated with the control of traffic flows during temporary, emergency and normal conditions. Technicians use powered equipment and hand tools to install structures for signals and associated lighting systems. Signs, controllers and conduit are installed for both underground and overhead applications. Technicians work on electrical circuits, sometimes energized, that supply power for signals and lighting. They may install computer equipment for more sophisticated systems and must know how to program and troubleshoot them. The use of metering and test equipment is extensive. Technicians can expect to work outdoors, often in inclement weather. They must be willing to travel. The job often requires the individual to work away from home, in another city. The work can be strenuous at times and is occasionally performed in elevated positions. A technician must be stable, dependable and be able to work with others or alone. You must be able to adjust to a variety of duties often characterized by frequent change. A mechanical and mathematical aptitude is desirable, as is the ability to plan and organize work. Manual dexterity and muscular coordination are also necessary attributes. Continuing growth in residential and industrial sectors of most western cities creates opportunity for employment. Current patterns of growth are anticipated to continue in the future, creating the need for apprentices and journeymen.