The Traffic Signal Design/Engineering Technician Level II certification indicates the holder has a thorough background in traffic signal technology from seminar work and experience. The Design/Engineering Level II certification indicates the technician has additional training on traffic signal control systems planning, design, theory of operation and legal/regulatory issues. Areas of training include industry standards, liability and regulatory considerations, traffic data collection, site inspections (prior to signal design), detection design, intersection phasing and timing plans, volume density and coordination timing, equipment selection and project management. The certification holder will be prepared to make a substantial contribution to the design of signalized intersections, whether employed by a private firm or a public agency, where new or re placement traffic signal planning and design is the focus.