A582 Options Assessment Report
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A582 South Ribble Western Distributor Lancashire County Council Options Assessment Report Document No.02 | Rev 0 July 2019 Opti ons Assessment Report Lancashire C ounty Council Options Assessment Report A582 South Ribble Western Distributor Project No: B2327FT6 Document Title: Options Assessment Report Document No.: Document No.02 Revision: Rev 0 Date: July 2019 Client Name: Lancashire County Council Client No: Client Reference Project Manager: Sergey Makov Author: Jonathan Carr File Name: P:\B2000000\B2327FT6 - A582 Business Case\3 JC Tech Work\3.1 Transportation\3.1.2 Reports\02 - OAR\A582 Option Assessment Report draft v0.9.docx Jacobs U.K. Limited 1 City Walk Leeds, West Yorkshire LS11 9DX United Kingdom T +44 (0)113 242 6771 F +44 (0)113 389 1389 www.jacobs.com © Copyright 2019 Jacobs U.K. Limited. The concepts and information contained in this document are the property of Jacobs. Use or copying of this document in whole or in part without the written permission of Jacobs constitutes an infringement of copyright. Limitation: This document has been prepared on behalf of, and for the exclusive use of Jacobs’ client, and is subject to, and issued in accordance with, the provisions of the contract between Jacobs and the client. Jacobs accepts no liability or responsibility whatsoever for, or in respect of, any use of, or reliance upon, this document by any third party. Document history and status Revision Date Description By Review Approved 0a 20/06/19 Final draft for LCC approval JC SM SM 0b 12/07/19 For LCC Review JC SM SM Document No.02 i Options Assessment Report Contents 1. Introduction ............................................................................................................................................... 1 1.1 Purpose of Document ................................................................................................................................. 1 1.2 Document Structure .................................................................................................................................... 2 2. Existing and Future Situation .................................................................................................................. 3 2.1 Introduction ................................................................................................................................................. 3 2.2 Existing Network and Transport Services ................................................................................................... 3 2.3 Existing Travel Demand and Patterns ........................................................................................................ 5 2.4 Journey Times, Congestion and Reliability ................................................................................................. 9 2.5 Accidents................................................................................................................................................... 16 2.6 Air Quality.................................................................................................................................................. 17 2.7 Future Drivers of Travel Demand ............................................................................................................. 18 2.8 Impact of Not Intervening .......................................................................................................................... 20 2.9 The Need for Strategic Transport Intervention ......................................................................................... 21 3. Objectives ................................................................................................................................................ 23 3.1 National, sub-national and local priorities ................................................................................................. 23 3.2 Study Objectives ....................................................................................................................................... 24 3.3 Objective alignment with wider priorities ................................................................................................... 26 4. Option Generation .................................................................................................................................. 28 4.1 Introduction ............................................................................................................................................... 28 4.2 Option Generation ..................................................................................................................................... 28 5. Option Sifting .......................................................................................................................................... 32 5.1 Introduction ............................................................................................................................................... 32 5.2 Initial Sift.................................................................................................................................................... 32 5.2.1 Initial Sift: Assessment against Primary Objectives .................................................................................. 32 5.2.2 Initial Sift: Assessment of Deliverability and Feasibility ............................................................................ 34 5.3 Initial Sift Results ...................................................................................................................................... 35 5.4 Secondary Sift and Option Package Evaluation ....................................................................................... 36 5.5 Conclusion of Sifting Process ................................................................................................................... 38 Appendix A. Sifting Spreadsheet Document No.02 ii 1. Introduction 1.1 Purpose of Document This document represents the Options Assessment Report (OAR) to support the Strategic Outline Business Case of the A582 South Ribble Western Distributor (SRWD) scheme. In line with the Department for Transport’s Transport Business Case guidance (January 2013) a key part of the BC is a detailed assessment of the options developed to address local objectives to find the preferred solution. Option Development is the first stage of the transport appraisal process followed by further appraisal of better performing options, in order to obtain sufficient information to enable decision-makers to make a rational and auditable decision about whether or not to proceed with intervention. Figure 1-1 shows the stages of the option development process required by Web-based Transport Analysis Guidance (WebTAG) in the development of an OAR. Figure 1-1: The Option Development Process The purpose is to identify and sift options that best deliver the strategic needs for South Ribble as set out in the Central Lancashire Core Strategy and meet objectives and ambitions of the MRN investment programme to drive economic growth and housing gas well as improve congestion on the MRN. This process is completed in line with the requirements set out within the DfT's Transport Analysis Guidance (TAG). This report therefore follows this guidance, and identifies the need for intervention, generates a set of potential options and sifts the options against the MRN objectives and strategic objectives for Central Lancashire and South Ribble. Document No.02 1 The result is a preferred option and a next best / low cost option identified in accordance with TAG guidance as part of a business case submission. In line with Figure 1-1 the option assessment adopts a standard sifting approach to the assessment and scoring of each potential option against a list of identified objectives, viability and deliverability criteria based on the qualitative analysis. Future modelling and economic appraisal of a preferred option and next best alternative will be undertaken to meet DfT and WebTAG requirements as part of Stage 2 Further appraisal (OBC). 1.2 Document Structure The remainder of the report is structured to follow the 8 steps in the WebTAG option development process up to the development of an options assessment report. Each stage of the process is documented within the following chapters: • Chapter 2: Existing and Future Situation • Chapter 3: Objectives • Chapter 4: Option Generation • Chapter 5: Option Sifting Document No.02 2 2. Existing and Future Situation 2.1 Introduction This section of the Option Appraisal Report sets out the current and future transport situation in South Ribble and identifies transport related problems which establish the need for a transport intervention. The analysis reported in this document emphasises the main points and issues identified during the preparation of the Strategic Case, and represents only part of the total analysis. Further detail on this analysis is contained in the Strategic Case chapter of the A582 SWRD Strategic Outline Business Case (SOBC). 2.2 Existing Network and Transport Services South Ribble is served by three main arterial “A road” routes, the A6, A59 and A582, which provide the main access routes between settlements and employment sites in South Ribble, the SRN and the three main access points to the Preston urban area, the main economic and urban centre of the Central Lancashire region, across the River Ribble which divides South Ribble from Preston. The study area takes in these three