EXAMPLES OF ESSENTIAL FUNCTIONS: Essential and other important responsibilities and functions may include, but are not limited to, the following: Perform para-professional and technical work relative to assigned areas of responsibility, including but not limited to construction, operation, inspection, troubleshooting, maintenance, and repair of traffic signals, equipment, ITS infrastructure, communications equipment, and street lighting. Assist in the design and preparation of plans and specifications for public works projects including traffic signals, ITS infrastructure, equipment, communication equipment, street lighting, and related projects; Assist in the project design research; and perform calculations and prepare estimates of time and material costs.