The defined scope of this Task is the development of a Guide to be used in-house by NYCDOT traffic engineers documenting all the necessary steps in requesting and approving traffic signals, with a focus on traffic signal control principles, practices, and technologies. The research team proposes to produce such a guide in the first year of a multi-year undertaking now being proposed, and to focus later phases on modernizing the basic principles that underlie such a Guide. The later phases will be defined in conjunction with NYCDOT during the first year.