IES RP 22 2011

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ANSI / IES RP-22 Tunnel Lighting – Revised 2015

Published By	Publication Date	Number of Pages
IES	2011	53

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Category: IES

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Description

The purpose of this Standard Practice is to provide recommendations for designing new tunnel lighting systems, and it is not intended to be applied to existing lighting systems until such systems are redesigned. It has been prepared to advance the art, science, and practice of illumination as it pertains to tunnel lighting in North America. Lighting is added to vehicular tunnels to enable a motorist to maintain speed and safely navigate. Tunnels may require considerably different treatment of the threshold zone luminance values, depending on variables such as geographic orientation, geometric design, traffic volume, traffic speed, service levels, light source used, and modes of light application. Treatment of tunnel portals, wall and ceiling surfaces and selection of lighting equipment, as well as light sources, maintenance and lighting economics are also reviewed and assessed.

PDF Catalog

PDF Pages	PDF Title
1	Cover
3	Copyright
4	IES Tunnel Lighting Subcommittee
6	Contents
10	1.0 Introduction 1.1 What is new in RP-22-2011 2.0 Definition of Terms 2.1 Definition of a Tunnel 2.2 Divided and Undivided Tunnels 2.3 Underpasses
11	2.4 Tunnel Topology 2.4.1 Fixation Point 2.4.2 Approach 2.4.3 Adaptation Point 2.4.4 Adaptation Distance 2.4.5 Portal 2.4.6 Threshold Zone 2.4.7 Transition Zone 2.4.8 Interior Zone 2.4.9 Exit Lighting
12	3.0 Traffic and Roadway Geometry 3.1 Traffic 3.2 Divided and Undivided Structures 4.0 Visibility at the Tunnel Approach 4.1 General
13	4.2 Traffic Speed 4.3 Night Adaptation 5.0 Eye Adaptation at the Tunnel Approach 5.1 General 5.2 Solar and Tunnel Orientation 5.3 Sky
14	5.4 Daylight Contribution 5.5 Exterior Surface Luminance
15	6.0 Lighting Design Criteria 6.1 General
16	6.2 Threshold Zone Lighting Requirements 6.3 Assessment of Major Factors Influencing Lighting Design Criteria 6.4 Method of Determination of Luminance Levels
17	6.4.1 Luminance Values in Threshold Zone – Table Method 6.4.2 Luminance Values in Threshold Zone – Lseq Method
20	6.4.3 Threshold and Transition Zones
22	6.4.4 Tunnel Interior Zone 6.4.5 Nighttime Luminance 6.4.6 Non-Roadway Surface Illumination
23	6.4.7 Uniformity Ratios
24	6.5 Flicker Effect 6.6 Switching Steps in Threshold and Transition Zones 6.7 Emergency Lighting
25	7.0 Light Application Techniques 7.1 Symmetrical Light Distribution 7.2 Asymmetrical Light Distribution – Negative Contrast (ALD-NC 7.3 Asymmetrical Light Distribution – Positive Contrast (ALD-PC 7.4 Wide and Narrow Tunnels 8.0 Architecture and Materials 8.1 General 8.2 Pavement
26	8.3 The Portal and its Surrounding Area 8.4 Architectural Features 8.5 Reflective Characteristics of Road, Wall and Ceiling Materials 9.0 Lighting and Electrical Equipment 9.1 Light Sources
27	9.1.1 Fluorescent 9.1.2 Low Pressure Sodium (LPS 9.1.3 High Pressure Sodium (HPS 9.1.4 Metal Halide (MH
28	9.1.5 Other Light Sources 9.2 Equipment and Luminaires 9.3 Electric Power Supply and Distribution 9.4 Measurement, Control and Switching Systems
29	10.0 Lighting System Economics 10.1 General 10.2 Initial Cost 10.3 Life-Cycle Economic Analysis
30	11.0 Maintenance Considerations 11.1 General 11.2 Lamp Lumen Depreciation 11.3 Lamp Burnout Factor (BOF
31	11.4 Luminaire Dirt Depreciation (LDD 11.5 Equipment Factors (EF 11.5.1 Ambient Temperature 11.5.2 Voltage 11.5.3 Ballast and Lamp Factor 11.5.4 Luminaire Component Depreciation 11.6 Maintenance of the Photocontrols 11.7 Tunnel Surface Reflectance Depreciation
32	11.7.1 Selection of Tunnel Surface Reflectance 11.7.2 Reflectance Depreciation 11.8 Luminaire Cleaning, Relamping and Replacement 11.8.1 Luminaire Cleaning 11.8.2 Relamping 11.8.3 Luminaire Replacement 11.9 Other Factors
33	11.9.1 Pavement Reflectance 11.9.2 Other Reflection Characteristics 11.9.3 Physical Geometry 11.9.4 Errors References
34	Additional Suggested Reading Glossary
39	Annex A Calculation and Field Verification Methods
46	Annex B Contrast Method for Determining Threshold Lighting
48	Annex C Calculation of Tunnel Wall Luminance Using Bi-Directional Reflectance Factors (BRDF) for Typical Materials Used for Tunnel Walls
50	Annex D Evaluation of Lseq – Correct Use of a Camera From: CIE 88:2004 Edited For RP-22
51	Annex E Conversions, Acronyms and Symbols