Road Tunnel Lighting Guide

John Rands CEng MILP

Yerevan, Armenia, 20 April 2016

Ministry of Nature Protection of RA

Contents Overview

• Road Tunnels - Overview • Styles Of Tunnel Lighting • Current Practice • Road Tunnel Lighting – Design & Performance • Short Tunnels • Materials & Installation • Summary Of Recommendations • Risk Assessment

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Running Hours

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Initial Design Requirement Prior to embarking on a lighting design or a lighting design specification for a road tunnel the following criteria will be required to be established: • Structural details of the tunnel. • Design / speed limit of approach road(s). • Stopping Distance (m) • Tunnel Class based on:

– Traffic Flow Rate – Traffic Mix

• Access Zone Luminance L20 (cd/m2) • K factor value based on Tunnel Class & Speed Limit • Threshold Zone Luminance based on L20 x K (cd/m2) • Total Threshold Zone Length = Stopping distance (m) • Interior Zone Luminance based on Tunnel Class & Speed Limit (cd/m2) • Exit Zone Luminance = 5 x Interior Luminance (cd/m2) • Exit Zone Length (m) • Road Surface Category (R1, C2 etc.)

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Design and Performance Requirements (1)

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Design and Performance Requirements (2)

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Entrance Zone Performance Requirements

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Conclusions per Evaluations • where LTP < 20%, artificial daytime lighting should always be provided; • where LTP > 80%, artificial daytime lighting is generally not needed; • where LTP is between 20% & 80%, the following additional process should be

followed to determine if daytime lighting is needed

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Devices and Tools (1)

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Devices and Tools (2)

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Alternative Control

Guidance Lighting

Bibliography CIE: CIE 88:2004 2nd Edition, International Commission on Illumination Guide for the lighting of road tunnels and underpasses

BSI: BS 5489-2:2003+A1:2008 Code of practice for the design of road lighting – Lighting of Tunnels

CEN: CR 14380: 2003 (Technical Report) Lighting applications – Tunnel lighting

MCHW: Mechanical, electrical and communications work for road tunnels

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