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PROPOSED BRIDGE REPLACEMENT WYNYARD CROSSING WYNYARD QUARTER TRANSPORT ASSESSMENT Prepared By: Todd Langwell June 2019 Reference: 19148 Issue C – Final Auckland Office: P O Box 60-255, Titirangi, Auckland 0642 Level 1, 400 Titirangi Road, Titirangi Village Tel: (09) 817 2500 Fax: (09) 817 2504 www.trafficplanning.co.nz Project Information: Client Panuku Development Auckland Job Number 19148 Title Proposed Bridge Replacement - Wynyard Crossing, Wynyard Quarter - Transport Assessment Prepared By Todd Langwell Date June 2019 Document History and SSStatusStatus Revision Date Issued Reviewed By Approved by Date approved Status A 26/05/2019 Todd Langwell 31/05/2019 Draft B 12/06/2019 Todd Langwell 13/06/2019 Updated Draft C 13/06/2019 Todd Langwell 14/06/2019 Final This document and information contained herein is the intellectual property of Traffic Planning Consultants Ltd and is solely for the use of Traffic Planning Consultants Ltd contracted client. This document may not be used, copied or reproduced in whole or part for any purpose other than that for which it is supplied, without the written consent of Traffic Planning Consultants Ltd. Traffic Planning Consultants Ltd accepts no responsibility to any third party who may use or rely upon this document. Proposed Bridge Replacement Wynyard Crossing, Wynyard Quarter Transport Assessment Issue C – Final Ref: 19148 TABLE OF CONTENTS 1.0 INTRODUCTION......................................................................................................... 1 2.0 BACKGROUND & CONTEXT ........................................................................................ 2 2.1 The Existing Bridge – Purpose, Design & Operation ................................................ 2 2.2 Surrounding Walking Facilities ................................................................................ 4 2.3 Surrounding Cycling Facilities ................................................................................. 6 2.4 Current Walking & Cycling Demands ...................................................................... 7 2.5 Future Walking & Cycling Demands ........................................................................ 8 2.5.1 Summary........................................................................................................ 10 2.6 Adjacent Road Network ........................................................................................ 11 3.0 THE PROPOSAL & DESIGN ASSESSMENT .................................................................. 12 3.1 General Description .............................................................................................. 12 3.2 Suitability of Shared Use ....................................................................................... 13 3.3 Design Width ........................................................................................................ 15 3.4 Design Gradients .................................................................................................. 17 3.4.1 Gradients - Pedestrian Requirements ............................................................. 18 3.4.2 Gradients – Mobility Requirements ................................................................ 18 3.5 Balustrade Design ................................................................................................. 19 3.6 Bridge Opening / Closing Operation ...................................................................... 20 3.7 Bridge Surface ...................................................................................................... 21 3.8 Other Bridge Comparisons & Benchmarking ......................................................... 21 3.8.1 The Webb Bridge – Melbourne, Australia ....................................................... 21 3.8.2 The Sandridge Bridge – Melbourne, Australia ................................................ 22 3.8.3 The Evan Walker Bridge – Melbourne, Australia............................................. 22 3.8.4 The Seafarers Bridge – Melbourne, Australia ................................................. 23 3.8.5 The Millennium Bridge – London, United Kingdom ........................................ 23 4.0 CONSTRUCTION RELATED TRANSPORT EFFECTS ....................................................... 25 5.0 PROPOSED TEMPORARY BRIDGE ............................................................................. 27 6.0 CONCLUSIONS ......................................................................................................... 29 Proposed Bridge Replacement Wynyard Crossing, Wynyard Quarter Transport Assessment Issue C – Final Ref: 19148 - 1 - 1.01.01.0 INTRODUCTION The Wynyard Crossing is located within the Viaduct Harbour, to the west of Auckland’s Central Business District (CBD). It connects Te Wero island with Wynyard Quarter adjacent to Karanga Plaza and provides an east/west link for walking and cycling between Wynyard Quarter and Downtown Auckland, while maintaining boat access to the Inner Viaduct Harbour. Wynyard Crossing Te Wero Island Outer Wynyard Viaduct Quarter Karanga Plaza Inner Viaduct Figure 111 ––– Bridge Location Source: wises.co.nz The application involves the removal of the existing Wynyard Crossing bridge which has reached the end of its design life. The existing bridge was designed and consented as a temporary bridge. The existing bridge will be replaced by a new permanent bridge. It is expected that the construction will take approximately 9 months. During this period a temporary crossing will be established to the south of the existing bridge beyond the Tidal steps. The proposed bridge is described in more detail in the Assessment of Environmental Effects attached to application. In summary, it is to be a double-leaf bascule bridge along the same alignment as the existing bridge. Bridge approaches will connect the proposed bridge to land (Te Wero Island and Wynyard Precinct), either side of the double leaf bascule. This report has been prepared to provide an independent transport assessment of the proposed bridge, including its construction and the temporary crossing. It describes the nature of the transport environment into which the bridge exists; sets out and assesses the transport characteristics of the design and its likely impacts on the immediate transport environment. Proposed Bridge Replacement Wynyard Crossing, Wynyard Quarter Transport Assessment Issue C – Final Ref: 19148 - 2 - 2.02.02.0 BACKGROUND & CONTEXT 2.12.12.1 The Existing Bridge ––– PurposePurpose,, Design & Operation The existing Wynyard Crossing bridge was designed and constructed to provide pedestrian and cycling across the Viaduct Harbour. It connects Te Wero Island with Wynyard Quarter adjacent to Karanga Plaza and provides an east/west link for walking and cycling between Wynyard Quarter and Downtown Auckland. It was planned as a temporary bridge and was completed in 2011. It was intended to operate for a 6-year design life when a permanent bridge was intended to be completed. The design of the structure and operating equipment reflected its temporary nature and enabled simple cost- effective construction and subsequent removal in future. From a walking and cycling perspective, the bridge has had significant benefits for several user groups including commuters, recreational users, tourists and visitors. It is therefore important to maintain and a safe and reliable pedestrian and cycle connection and boat access to the Inner Viaduct Harbour. Figure 222:2: Existing Bridge The existing bridge has a total span of 96.0 metres between landing at each. The section of bridge that lifts has a span of 46.0 metres and is slightly offset towards the west of the overall span. The section of bridge that pedestrians need to be cleared from in order for the bridge to be lifted amounts to some 76.0 metres. Proposed Bridge Replacement Wynyard Crossing, Wynyard Quarter Transport Assessment Issue C – Final Ref: 19148 - 3 - The minimum clear operating width through the main and middle span of the bridge that lifts to allow boats to pass is 4.3 metres. Slightly wider approaches (5.0 metres wide) are provided either side of the main span and accommodate control gates that hold pedestrian and cyclists and the cable systems for lifting the bridge. The gate system provides a constrained “gateway” onto the bridge that signals to all users the presence of the bridge ahead and assists in managing speeds of cyclists (including other modes such as electric scooter and skateboards). Immediately outside the bridge structure, the approaches widen to more than 10 metres within Wynyard Quarter (between Karanga Plaza and the former Viaduct Events Centre, now occupied by Emirates Team New Zealand) and Te Wero Island. The existing bridge span provides for various gradients throughout the approaches to and across the bridge with a maximum grade of 1 in 20 (5%). There are no mobility platform respite areas provided through the 96.0 metre span of the bridge and the flat landing areas of Te Wero Island and Karanga Plaza sides of the bridge. Figure 333:3: Bridge Approach & Control Gates The day to day operation of the bridge consists of the bridge being down and open to free movement by various user groups in shared use environment except when being opened to allow marine traffic to pass to and from the Inner Viaduct Harbour. Observations made during peak and off-peak times identify that pedestrians and cyclists generally move freely and in an uncongested manner with little disruption or delay. Cyclists typically