Wicklow County Council N11/M11 Junction 4 to Junction 14 Improvement Scheme Scheme Feasibility Report 265455-ARUP-GEN-XX-RP-ZM-0003 Issue 4 | 28 November 2019 This report takes into account the particular instructions and requirements of our client. It is not intended for and should not be relied upon by any third party and no responsibility is undertaken to any third party. Job number 265455 Ove Arup & Partners Ireland Ltd Arup 50 Ringsend Road Dublin 4 D04 T6X0 Ireland www.arup.com Document Verification Job title N11/M11 Junction 4 to Junction 14 Improvement Job number Scheme 265455 Document title Scheme Feasibility Report File reference Document ref 265455-ARUP-GEN-XX-RP-ZM-0003 Revision Date Filename N11M11-04.04.002.docx Draft 1 14 Jan Description First draft 2019 Prepared by Checked by Approved by Name Martin Allen Peter Adams Mike Evans Signature Issue 1 8 Mar Filename 265455 -ARUP -GEN -XX -RP -ZM -0003 -Issue 1.docx 2019 Description Prepared by Checked by Approved by Name Martin Allen Peter Adams Mike Evans Signature Issue 2 19 Mar Filename 265455 -ARUP -GEN -XX -RP -ZM -0003 -Issu e 2.docx 2019 Description Revised following KNRO review. Prepared by Checked by Approved by Name Martin Allen Peter Adams Mike Evans Signature Issue 3 01 April Filename 265455-ARUP-GEN-XX-RP-ZM-0003-Issue 3.docx 2019 Description Revised following WCC review Prepared by Checked by Approved by Name Martin Allen Peter Adams Mike Evans Signature Issue Document Verification with Document 265455-ARUP-GEN-XX-RP-ZM-0003 | Issue 4 | 28 November 2019 | Arup \\GLOBAL\EUROPE\DUBLIN\JOBS\265000\265455-00\4. INTERNAL\4-04 REPORTS\4-04-03 INFRASTRUCTURE\3. FEASIBILITY REPORT\265455-ARUP-GEN-XX-RP-ZM-0003-ISSUE 4.DOCX Document Verification Page 2 of 2 Job title N11/M11 Junction 4 to Junction 14 Improvement Job number Scheme 265455 Document title Scheme Feasibility Report File reference Document ref 265455-ARUP-GEN-XX-RP-ZM-0003 Revision Date Filename 265455-ARUP-GEN-XX-RP-ZM-0003-Issue 4.docx Issue 4 28 Nov Descripti 2019 on Prepared by Checked by Approved by Name Martin Allen Peter Adams Mike Evans Signature Filename Descripti on Prepared by Checked by Approved by Name Signature Filename Descripti on Prepared by Checked by Approved by Name Signature Filename Descripti on Prepared by Checked by Approved by Name Signature Issue Document Verification with Document 265455-ARUP-GEN-XX-RP-ZM-0003 | Issue 4 | 28 November 2019 | Arup \\GLOBAL\EUROPE\DUBLIN\JOBS\265000\265455-00\4. INTERNAL\4-04 REPORTS\4-04-03 INFRASTRUCTURE\3. FEASIBILITY REPORT\265455-ARUP-GEN-XX-RP-ZM-0003-ISSUE 4.DOCX Wicklow County Council N11/M11 Junction 4 to Junction 14 Improvement Scheme Scheme Feasibility Report Contents Page 1 Introduction 1 1.1 Overview 1 1.2 Purpose of Scheme Feasibility Report 1 1.3 Scheme Background 1 1.4 Study Area 2 2 Policy Context 4 2.1 National Policy 4 2.1.1 Project Ireland 2040 (National Planning Framework) 4 2.1.2 National Development Plan (2018 – 2027) 4 2.1.3 Investment in our Transport Future – Strategic Investment Framework for Land Transport (SIFLT) 4 2.1.4 Smarter Travel – A Sustainable Transport Future (2009 – 2020) 5 2.2 Regional Policy 6 2.2.1 Greater Dublin Area Transport Strategy (2016-2035) 6 2.3 European Policy 7 2.3.1 Trans-European Transport Network (TEN-T) 7 2.4 Local Policy 8 2.4.1 Wicklow County Development Plan (2016 – 2022) 8 2.4.2 Dún Laoghaire – Rathdown County Development Plan (2016 – 2022) 9 3 Existing Conditions on the National Route 10 3.1 Existing Road Network 10 3.2 Existing Natural Constraints 11 3.3 Existing Human Environment 13 3.4 Existing Transportation Issues 14 3.4.1 N11/M11 Corridor 14 3.4.2 Existing Public Transport Provision 15 4 Existing Road Alignment 18 4.1 Overview 18 4.1.1 Existing N11/M11 Route Characteristics 18 4.1.2 Mainline Cross Section 19 4.1.3 Junctions and Accesses 20 4.1.4 Existing Junction Geometry and Capacity 23 4.1.5 Junction Merges and Diverges 23 4.1.6 Junction Separation and Weaving Lengths 26 265455-ARUP-GEN-XX-RP-ZM-0003 | Issue 4 | 28 November 2019 | Arup \\GLOBAL\EUROPE\DUBLIN\JOBS\265000\265455-00\4. INTERNAL\4-04 REPORTS\4-04-03 INFRASTRUCTURE\3. FEASIBILITY REPORT\265455-ARUP-GEN-XX-RP-ZM-0003- ISSUE 4.DOCX Wicklow County Council N11/M11 Junction 4 to Junction 14 Improvement Scheme Scheme Feasibility Report 5 Journey Time Assessments 29 6 Traffic Volumes 31 6.1.1 Traffic Counts & Surveys 31 6.1.2 Origin – Destination Surveys 33 6.1.3 Future Forecasts 35 7 Safety Review 36 7.1 Assessment of Study Area and Existing National Route 36 7.2 Recommendations for Improvement to Safety Conditions 41 8 Feasible Transport Solutions 43 8.1 Possible Options and Alternatives 43 8.1.1 Overview 43 8.1.2 Potential Options 43 9 Cost Estimate 46 9.1 Feasibility Working Cost 46 10 Conclusions and Recommendations 47 10.1 Key Findings of Feasibility Report 47 10.2 Conclusions and Recommendations 47 265455-ARUP-GEN-XX-RP-ZM-0003 | Issue 4 | 28 November 2019 | Arup \\GLOBAL\EUROPE\DUBLIN\JOBS\265000\265455-00\4. INTERNAL\4-04 REPORTS\4-04-03 INFRASTRUCTURE\3. FEASIBILITY REPORT\265455-ARUP-GEN-XX-RP-ZM-0003- ISSUE 4.DOCX Wicklow County Council N11/M11 Junction 4 to Junction 14 Improvement Scheme Scheme Feasibility Report 1 Introduction 1.1 Overview Arup has been appointed to provide multi-disciplinary technical consultancy services for the delivery of Phase 1-4 of the TII Project Management Guidelines for the N11/M11 Junction 4 to Junction 14 Improvement Scheme. The N11/M11 Junction 4 to Junction 14 Improvement Scheme is a proposed scheme to alleviate congestion and improve safety, journey time reliability and the strategic function of the N11/M11 corridor. 1.2 Purpose of Scheme Feasibility Report The Scheme Feasibility Report has been produced as an output of the Phase 1 Scheme Concept and Feasibility studies. The purpose of phase 1 is to identify the project need, scope and extent and to set out a strategy and structure to progress the scheme delivery. Within this phase, the Scheme Feasibility Report has been prepared to gain a better understanding of the issues and challenges at hand, and to assist in planning the direction of further studies. It should be noted that the report has been prepared in advance of formal commencement of any planning or design. However, potentially feasible solutions to meet the scheme objectives are suggested, with a more rigorous appraisal of the viability of these options to be undertaken during phase 2 (Option Selection). 1.3 Scheme Background The N11/M11 comprises of a motorway/dual carriageway for approximately 126km and runs along the east of the county connecting Dublin to Wexford. The N11/M11 forms part of the Trans-European Transport Network (TEN-T) providing access from Dublin to the south east of the country and a link between Dublin and Rosslare Europort. The section under consideration for this commission is approximately 22km long and extends from the M11/M50 junction (J4) to the N11/M11 junction at Coyne’s Cross (J14). This section traverses two Local Authority boundaries, Wicklow County Council and Dún Laoghaire – Rathdown County Council. A Section 85 agreement has been put in place between the two local authorities which appoints Wicklow County Council (WCC) as the Lead Local Authority and Sponsoring Agency of the project. Kildare National Roads Office (KNRO) has been appointed by Transport Infrastructure Ireland (TII), acting as the Sanctioning Authority, to project manage the delivery of the scheme. The N11/M11 has been in service since 1991 with the completion of the Bray Bypass. The section between M50 junction 4 and N11 junction 6 was upgraded in 2005 and the section between junction 14 and Gorey was designated motorway standard in 2009. This has highlighted deficiencies on the remaining section which has had limited intervention or upgrade and now sits between two sections of high quality motorway. 265455-ARUP-GEN-XX-RP-ZM-0003 | Issue 4 | 28 November 2019 | Arup Page 1 \\GLOBAL\EUROPE\DUBLIN\JOBS\265000\265455-00\4. INTERNAL\4-04 REPORTS\4-04-03 INFRASTRUCTURE\3. FEASIBILITY REPORT\265455-ARUP-GEN-XX-RP-ZM-0003- ISSUE 4.DOCX Wicklow County Council N11/M11 Junction 4 to Junction 14 Improvement Scheme Scheme Feasibility Report Some sections of this portion of the N11/M11 corridor fall short in terms of current road design standards, with numerous direct accesses and at grade junctions. These deficiencies impact on traffic flow conditions and result in significant congestion during the weekday morning and evening peaks and ineffective levels of service. Consequently, this section of the N11/M11 fails to meet its primary function as a strategic road. 1.4 Study Area The Study Area for the N11/M11 Junction 4 to Junction 14 Improvement Scheme is illustrated in Figure 1.3 below. 265455-ARUP-GEN-XX-RP-ZM-0003 | Issue 4 | 28 November 2019 | Arup Page 2 \\GLOBAL\EUROPE\DUBLIN\JOBS\265000\265455-00\4. INTERNAL\4-04 REPORTS\4-04-03 INFRASTRUCTURE\3. FEASIBILITY REPORT\265455-ARUP-GEN-XX-RP-ZM-0003- ISSUE 4.DOCX Wicklow County Council N11/M11 Junction 4 to Junction 14 Improvement Scheme Scheme Feasibility Report Figure 1.3: N11/M11 Junction 4 to Junction 14 Improvement Scheme Study Area 265455-ARUP-GEN-XX-RP-ZM-0003 | Issue 4 | 28 November 2019 | Arup Page 3 \\GLOBAL\EUROPE\DUBLIN\JOBS\265000\265455-00\4.