♦Manual Notice 2020-1
►1. Introduction
►2. Requests for Traffic Signals
- ►1. Sources of Requests
- ►2. Action on Requests
  - ♦Districts Act on Requests
  - ♦Acknowledgment of Request
  - ♦Process Overview
►3. Traffic Studies
- ►1. Overview
  - ♦Introduction
  - ♦Responsibility
  - ♦Costs
  - ♦Required Information
  - ♦Warrant Analysis Data
  - ♦Recommending Against Installation
- ►2. Condition Diagram
  - ♦Introduction
  - ♦Information Sources
  - ♦Additional Necessary Information
- ►3. Location Map and Photographs
  - ♦Location Map
  - ♦Photographs
- ►4. Crash Data
  - ♦Introduction
- ►5. Vehicle and Pedestrian Traffic Counts
  - ♦Introduction
  - ♦Types of Counts
  - ♦Vehicle Counts at Existing Locations
  - ♦Counting Techniques
  - ♦Recording Manual Counts
  - ♦Estimated and Projected Counts
  - ♦Pedestrian Counts
  - ♦School Pedestrian Counts
- ►6. Approach Speeds
  - ♦Introduction
- ►7. Traffic Survey Count Analysis
  - ♦Count Data Processing
  - ♦The Traffic Survey — Count Analysis Form
- ►8. Intersection Delay Study
  - ♦Introduction
  - ♦Time of Study
  - ♦Equipment
  - ♦Form
  - ♦Procedure
  - ♦Study Results
▼4. Operational Considerations
- ►1. Overview
  - ♦Introduction
  - ♦Equipment Repair
- ►2. Coordinated Operation
- ►3. Preemption
  - ♦Preemption by Railroad Equipment
  - ♦Preemption by Emergency Vehicles
- ►4. Flashing Operation
  - ♦Introduction
  - ♦Malfunction Flash
  - ♦Maintenance Flash
  - ♦Railroad Preemption Flash
  - ♦Scheduled Flash
  - ♦Left-Turn Flash
►5. Traffic Signal Projects
- ►1. Overview
- ►2. Traffic Signal Projects Funding
  - ♦Introduction
  - ♦Programming
  - ♦Agreements
  - ♦Method of Construction
  - ♦Letting
  - ♦Construction
  - ♦Shop Drawings
  - ♦Changes on Contract Projects
  - ♦Changes on City Force Projects
  - ♦Project Administration
- ►3. Plan Requirements for PS&E
  - ♦Introduction
  - ♦Data for Plan Preparation
  - ♦Title Sheet
  - ♦Estimate and Quantity Sheet
  - ♦Condition Diagram Sheet
  - ♦Plan Sheets
  - ♦Elevation Sheets
  - ♦Detail Sheets
  - ♦Specifications
  - ♦PS&E Paperwork
- ►4. Accessible Pedestrian Signals Guidelines
  - ♦Purpose
  - ♦Definition
  - ♦Background
  - ♦Recommended Practice
  - ♦Engineering Study for APS
  - ♦Design Considerations
  - ♦Specifications
  - ♦References
  - ♦Intersection Prioritization Tool Worksheet
- ►5. Uninterruptible Power Supply/Battery Back-up (UPS/BBU) System
  - ♦Purpose
  - ♦Definition
  - ♦Background
  - ♦Recommended Practice
  - ♦Design Considerations
  - ♦Maintenance Considerations
  - ♦Removal of UPS/BBU
- ►6. Flashing Yellow Arrow Display for Left-Turn Operations
  - ♦Purpose
  - ♦Background
  - ♦Signal Face Types
  - ♦Modes of Operation
  - ♦Signal Head Requirements
  - ♦Engineering Study
  - ♦Recommended Practice
  - ♦Emergency Preemption
  - ♦Variable Mode Operation
  - ♦Public Notification
  - ♦Equipment Issues
  - ♦Cabinet Modification
  - ♦Signing
  - ♦Observations
  - ♦Crash Data
  - ♦Other Considerations
  - ♦References
- ►7. Pedestrian Hybrid Beacons
  - ♦Introduction
  - ♦Considerations
►A. Forms
►B. Determination of Need for Traffic Control at School Crossings
►C. Intersection Prioritization Tool Worksheet

Chapter 4: Operational Considerations

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Section 1: Overview

Introduction

How a traffic signal will be operated and maintained needs to be considered along with the initial design and installation. This chapter covers several operational considerations, including coordination, preemption, and flashing operation. How a traffic signal interacts with adjacent signals, railroads, and emergency vehicles is important to the effectiveness of the transportation system.

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Equipment Repair

Failed equipment should be repaired by qualified personnel only. If the equipment is still under the manufacturer’s warranty, it should be sent to the manufacturer for repair. To minimize down time, spare units should be kept in stock for use while equipment is shipped for repair.