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Manual Notice
| Highway Illumination Manual |
TxDOT Manual System
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Manual Notice 2003-1
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1.
Introduction
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1.
Overview
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Purpose of Manual
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Users of Manual
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Training
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Experience
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References
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2.
Responsibilities
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Introduction
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Traffic Operations Division
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Bridge Division
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Design Division
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Districts
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2.
Lighting Systems, Highway Eligibility, and Warrants
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1.
Overview
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Introduction
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Types of Lighting Systems
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Eligibility and Warrants
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Submitting Substantiating Data
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Process Summary
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2.
Continuous Lighting
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Description
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Eligibility
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Warrants
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Specially Funded Projects
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3.
Safety Lighting
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Description
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Eligibility
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Warrants
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Continuous Lighting Classified as Safety Lighting
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4.
Bikeway and Pedestrian Way Lighting
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Eligibility and Warrant
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Adjacent Roadway Lighting
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5.
Systems Financed, Installed, and Operated by Other Agencies
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TxDOT Policy
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Guidelines
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3.
Master Lighting Plans
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1.
Overview
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Introduction
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Definition
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Benefits
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2.
Plan Development
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Introduction
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Participants
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Groups Having Concerns about Lighting
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3.
Goals of a Master Lighting Plan
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Introduction
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Improved Safety
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Environmentally Judicious Use of Resources
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Judicious Energy Use
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Attracting Tourists, Businesses, and Nighttime Activities
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Planned Maintenance
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4.
Lighting Curfews
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Introduction
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Background
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Reasons for Curfews
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Considerations Before Implementation
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5.
Electrical and Lighting Management Systems
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Introduction
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Cost
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Benefits
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Benefits of ELMS Standardization
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6.
Conducting Studies
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Introduction
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Electrical System
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Purpose of Lighting System
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Benefits and Effects of Curfews and Dimming
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Traffic Studies
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Surrounding Land Use and Surrounding Lighting
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Security Concerns
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Sky Glow and Light Trespass
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Community Goals
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Coordination with Navigation Authorities
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Traffic Management Interaction
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Controls
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Curfew Monitoring
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ELMS Implementation
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Coordination with Roadway Maintenance and Construction Activities
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Budget
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4.
Lighting Agreements
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1.
Overview
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Introduction
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Initiation of Agreement
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Excess Costs
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Modification of Standard Agreements
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City Ordinance or Resolution
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Order of Commissioners Court
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City (or County) Secretary’s Certificate
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Quotation on Plan Title Sheet
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Safety Lighting and Traffic Signal Installation
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Safety Lighting Incorporated into a Continuous System
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Default
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More Information
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2.
Continuous Lighting
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Introduction
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100 Percent Agreement
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50-50 Agreement
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3.
Safety Lighting
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Introduction
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Two Types of Agreements
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5.
Lighting Equipment
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1.
Overview
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Overview
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Specifications
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AASHTO Guidelines
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IESNA Guidelines
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Non-standard Lighting
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2.
Light Sources
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Introduction
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Incandescent Lamps
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Electric Discharge Lamps
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Electric Discharge Lamp Types
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High-Intensity Discharge Lamps
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Best Choice
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Spectral Energy Distribution Comparison
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3.
Luminaires
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Introduction
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Conventional Luminaires
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Mounting of Luminaires
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Cutoff
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Light Distribution Patterns
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Underpass Luminaires
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High Mast Lighting
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4.
Support Hardware
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Introduction
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Roadway Illumination Assembly
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Non-Breakaway Support
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Breakaway Support
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Transformer Base
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Breakaway Connectors
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5.
Other Equipment
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Electrical Services
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Other Electrical Equipment
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Other Lighting Equipment
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6.
Lighting Design and Layout
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1.
Overview
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Project Design Procedures
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Project Lead Time
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Joint Usage Encouraged
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Luminaires on Traffic Signal Poles
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Circuits Crossing Bridges
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Railroad Crossings
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2.
Illumination Levels
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Introduction
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Continuous Lighting
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Safety Lighting
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Tunnels
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Sidewalks and Bikeways
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Other Types of Lighting
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Additional Information
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3.
Plan Standards
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Introduction
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Scale of Plans
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Boring Logs
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Standard Plan Symbols
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Typical Plan Layout
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4.
Conventional vs. High Mast Lighting
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Introduction
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Installation Costs
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Maintenance Costs
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Some Deciding Considerations
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High Mast Systems Recommended
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High Mast Systems and Light Trespass
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High Mast Design and Layout
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5.
Glare and Sky Glow Issues
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Introduction
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Choice of Luminaires
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Luminaire Modification
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Resources
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6.
Spacing of Light Poles
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Standard Spacing for Freeways and Complete Interchange Lighting
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Standard Spacing for Roadways Other than Freeways
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Merge and Diverge Lanes
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Lighting Near Overpasses
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Determining Mounting Height
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Transition Lighting
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7.
Pole Placement Guidelines
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Introduction
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Clear Zone
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House Side vs. Median Mounting
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Two Types of Poles
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Breakaway Poles Preferred
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When Not To Use Breakaway Poles
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Protection of Non-breakaway Poles
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Placement of Non-breakaway Poles
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Falling Area for Breakaway Poles
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Use and Placement of Breakaway Poles
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House Side Lighting
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Median Lighting
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Median Lighting Design Examples
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Avoid Channelizing Islands
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Breakaway Pole Placement Examples
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Minimum Values
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Poles in Sidewalks
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Foundation Height
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Striking Height
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Breakaway Pole Frangibility
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7.
Electrical Systems
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1.
Overview
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Introduction
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National Electrical Code
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Electrical Details
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2.
Electrical Service
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Introduction
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Typical Service Types
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Circuit Length Limits
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Separate Electrical Service for Signs
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Where Service Does Not Exist
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3.
Circuit Design
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Introduction
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Voltage Drop
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Conductors and Conduit Size
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Conduit Run Length
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Overcurrent Protection
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Electrical Service Equipment Sizes
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Grounding Conductor Size
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4.
Calculating Voltage Drop
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Introduction
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Maximum Allowable Voltage Drop
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Formula
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Current in the Run
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8.
Temporary Lighting
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1.
Design and Layout
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Purpose
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Difference Between Temporary and Work Zone Lighting
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Special Considerations
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Types of Temporary Lighting
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Illumination Levels
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Electrical System Integrity
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Placement of Light Poles
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Installation
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Plans and Specifications
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2.
Financing
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General
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Method of Payment
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Reusable Equipment
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9.
Construction and Maintenance Guidelines
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1.
Overview
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Introduction
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Consistency
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Assistance
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2.
Review and Approval of Shop Drawings
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District Review and Approval
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For Purchase Requisition
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Breakaway Poles
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High Mast Lighting
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Copies to Materials and Tests Section
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Marking of Shop Drawings
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3.
Breakaway Light Poles
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Frangibility Requirement
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Structural Requirement
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Replacement Guidelines
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New Installation Guidelines
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Relocated Poles
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Poles Placed by Maintenance Forces
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Guidelines Apply to Cities
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Review of Shop Drawings
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Identifying Transformer Bases
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Striking Height
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Anchor Bolts
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4.
Group Relamping
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Background
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Advantages
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Strategy
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Cleaning Luminaires
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5.
High Mast Lighting Inspection and Servicing
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Introduction
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Documentation (Inspection Form)
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Items to Inspect
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Replacing Fixtures
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Responsibility of Cities
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Assistance
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6.
Other Maintenance Considerations
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Duct Cable
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Grout
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Rehabilitation of Old Circuits
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Maintenance Level of Service
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Maintenance Responsibilities of Cities
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Problems
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A.
Forms
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Introduction
Highway Illumination Manual
November 2003
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