10-Apr--14

Victoria Sutton (Landside Operations)Michael Cooper (Development Project Manager)

19341-XX-ME-400-000137

Business Case 031 – Tunnels RefurbishmentTaxi Liaison Meeting

Project Overview

• Refurbishment of Main & Cargo Tunnels• Replacement or Introduction of 24 various systems

• Structural Works, Life Safety Equipment, Architectural

• Objectives• Reduce risk to life to As Low As Reasonably Practicable (ALARP)

• Suitably reduce business continuity risk

• Replace life expired assets

• Minimise operational cost impacts

• Improve passenger experience

Architectural Treatment• “Living Garden” planting

masques entrance to

tunnel (similar to T5

Welcome Arch)

• Improved lighting under

business car-parking

bridge to extend

entrance to the tunnel

• Improved internal

treatment through simple

lighting

Traffic Management

• Planned Closures • Various configurations of lane closures from 22:00-05:30

• Always one lane in and one lane out available

• No day-time main bore closures

• Side bores closed throughout duration of works

• Extensive Modelling undertaken and numerous alternatives considered

• Traffic Trials undertaken April 2013

• Cyclists• Will remain to use the side-bores during survey works

• Will not be permitted to use the tunnels during these works

Programme

• Apr-14 Surveys Commence• 22:00-05:30 night time closures only

• Side-bores remain open during the day

• One side-bore to main open at night for cyclists (alternates)

• Cladding to be removed

• May-14 Surveys Conclude

• May-14 Main Works Start• 22:00-05:30 night time closures only

• Both side bores closed 24/7

• Any extension of times will be proceeded by trial closures first

• Dec-15 Main Works Complete