Question

answer following questions from the Traffic Signal Systems Operations and Design Book

1. What is the purpose of the ring barrier diagram?

2. How is timing represented in a ring barrier diagram?

3. Why use a ring barrier diagram instead of a conflict matrix to describe the sequencing of phases?

4. What is the difference between a movement and a phase ?

Answer 1

1. What is the purpose of the ring barrier diagram?
Ans- The purpose of the ring barrier diagram is to separate movements which are able to safely time simultaneously (ensures that movements do not conflict). time simultaneously (ensures that movements do not conflict). sequencing of the movements or phases.

2. How is timing represented in a ring barrier diagram?

Timing can be represented in the reliability (theory)-based design (RBD) by the duration of the phases along the x-axis of the diagram.

3. Why use a ring barrier diagram instead of a conflict matrix to describe the sequencing of phases?

The conflict matrix shows compatible and conflicting movements or phases, but not sequencing of the movements or phases. This is the role of the ring barrier diagram.

4. What is the difference between a movement and a phase ?

A phase is the timing unit which controls one or more movements. A movement is a collection of users with a common direction.