The signal controller timing is coordinated with that of one or more adjacent If one or more phases are actuated, the cycle length The signal controller times right-of-way assignments independently Isolated Versus Coordinated Signal Modes Mode Times special function timed intervals such as:.variable duration (up to a predetermined maximum) according to traffic demand (actuated control).

Times fixed clearance intervals such as:.Assures appropriate right-of-way assignments in accordance with pretimed or actuated intervals or phases.Electrically switches signal indications:.The traditional assignment of right-of-way for vehicles and pedestrians Includes units for lane use control and other applications not involving The traditional and original usage, most commonly referred to as traffic Portion of a controller assembly which selects and times signal displays. The controller assembly generally includes the cabinet.

The complete electrical mechanism mounted in a cabinet for controlling A signal operating in isolated mode can also be said to be operating free or uncoordinated. Table 7-3 summarizes the two distinct modes of traffic signal controller operation - isolated and coordinated. Table 7-1 presents some basic definitions used throughout the chapter, while Table 7-2 summarizes functions performed by a local controller.

Select controllers for specific applications.

Become familiar with various controller types, and.

Understand the principles of controller operation,.

This chapter provides detailed information on intersection traffic signal controllers so that the user can: Table of Contents Traffic Control Systems Handbook: Chapter 7.

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