E – 1699 Phasing Options for Traffic Signals

This Traffic Signal design course describes the process used for selecting and evaluating traffic signal phasing options.  Included in the course is a discussion of NEMA phase numbering, overlap designations, and design treatments for handling left turns.

Learning Objectives:

•  Provide an discussion of NEMA phase numbering
• Describe sample phase rotations
• Explain the use of recall settings
• Explain rings and barriers
• Discuss the use of overlaps
• Explain dual entry operation and conditional service
• Present left turn treatment options
• Present signal flashing options and alternatives