A27 Chichester Bypass Scheme Assessment Report
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A27 Chichester Bypass Scheme Assessment Report 343538-90-060-RE-002 February 2017 Project Support Framework (PSF) 2011-2016 A27 Chichester Bypass Scheme Assessment Report A27 Chichester Bypass Scheme Assessment Report 343538-90-060-RE-002 February 2017 Revision Record Revision Date Originator Checker Approver Description No P01 First Draft P02 SGAR2 Sign-off This document has been prepared on behalf of Highways England by Mott MacDonald Sweco JV for Highways England's Project Support Framework (PSF) 2011-2016. It is issued for the party which commissioned it and for specific purposes connected with the above- captioned project only. It should not be relied upon by any other party or used for any other purpose. Mott MacDonald Sweco JV accepts no responsibility for the consequences of this document being relied upon by any other party, or being used for any other purpose, or containing any error or omission which is due to an error or omission in data supplied to us by other parties. This document contains confidential information and proprietary intellectual property. It should not be shown to other parties without consent from Mott MacDonald Sweco JV and from the party which commissioned it. Prepared for: Prepared by: Highways England Mott MacDonald Sweco JV Bridge House Stoneham Place 1 Walnut Tree Close Stoneham Lane Guildford Southampton GU1 4LZ SO50 9NW Project Support Framework (PSF) 2011-2016 A27 Chichester Bypass Scheme Assessment Report Contents Page Glossary ................................................................................................................................................. 1 Executive Summary ............................................................................................................................. 2 Report Purpose ................................................................................................................................. 2 PCF Context ...................................................................................................................................... 2 Background ........................................................................................................................................ 3 Need for Intervention ........................................................................................................................ 3 Planning Factors ............................................................................................................................... 4 Project Objectives ............................................................................................................................. 4 Stage 1 Options ................................................................................................................................ 5 Interim Review .................................................................................................................................. 5 Stage 2 Options ................................................................................................................................ 6 Traffic Assessment ........................................................................................................................... 6 Economic Assessment..................................................................................................................... 8 Operational Assessment ................................................................................................................. 9 Maintenance Assessment ............................................................................................................. 10 Environmental Assessment ........................................................................................................... 10 Public Consultation ......................................................................................................................... 11 Conclusion and the Recommended Option ................................................................................ 11 1. Existing Conditions ..................................................................................................................... 12 1.1. The Existing Chichester Bypass ....................................................................................... 12 1.2. The Problem ........................................................................................................................ 13 1.3. Existing Conditions and Constraints ................................................................................ 13 1.4. Scheme Brief ....................................................................................................................... 16 2. Planning Factors ......................................................................................................................... 17 2.1. Chichester Local Plan (2014-2029) ................................................................................. 17 2.1.1. Existing Transport Links and Economy ..........................................................................17 2.1.2. Strategic Development Areas ........................................................................................18 2.2. Coastal West Sussex and Greater Brighton Local Strategic Statement (2013-2031) 19 2.3. South Downs National Park Local Plan (draft) ............................................................... 20 2.4. Arun Local Plan (2011 – 2031) ......................................................................................... 20 i Project Support Framework (PSF) 2011-2016 A27 Chichester Bypass Scheme Assessment Report 2.5. West Sussex Transport Plan (2011-2026) ...................................................................... 20 2.6. Highways England Delivery Plan (2015-2020) .............................................................. 21 2.7. National Environmental Policies ....................................................................................... 21 2.8. National Planning Policy Framework (March 2012) ...................................................... 22 2.9. National Policy Statement for National Networks .......................................................... 22 3. Do Nothing Consequences ....................................................................................................... 24 4. Alternative Options ..................................................................................................................... 26 4.1. Stage 1 Options .................................................................................................................. 26 4.2. Factors Considered in Options Development ................................................................ 26 4.3. Options Sifting ..................................................................................................................... 27 4.4. Stage 2 Value Management Workshop .......................................................................... 28 4.5. Stage 2 Options .................................................................................................................. 28 4.5.1. Option 1 .........................................................................................................................28 4.5.2. Option 1A.......................................................................................................................29 4.5.3. Option 2 .........................................................................................................................30 4.5.4. Option 2A.......................................................................................................................31 4.5.5. Option 3 .........................................................................................................................32 4.5.6. Option 3A.......................................................................................................................32 4.5.7. Option 4 .........................................................................................................................33 4.5.8. Option 5 .........................................................................................................................34 4.5.9. Option 6 .........................................................................................................................35 4.6. Interim Review of Options ................................................................................................. 36 5. Traffic, Economics and Costs ................................................................................................... 37 5.1. Traffic Forecasting .............................................................................................................. 37 5.1.1. Study Area .....................................................................................................................37 5.1.2. Model Validation ...........................................................................................................37 5.1.3. Impact on Road Network ..............................................................................................38 5.1.4. Comparison of route times on existing A27 Bypass and within Chichester ..................39 5.1.5. Comparison of Journey Times through Chichester .......................................................41 5.2. Economic Assessment ......................................................................................................