Appendix Y Technical Note 6: Mitigation States of Jersey Jersey Future Hospital Technical Note 6: Mitigation JFH-ARP-ZZ-XX-TN-Y-0029 P2 | 23 June 2017 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 237035-00 Ove Arup & Partners Ltd Central Square Forth Street Newcastle upon Tyne NE1 3PL United Kingdom www.arup.com Document Verification Job title Jersey Future Hospital Job number 237035-00 Document title Technical Note 6: Mitigation File reference Document ref JFH-ARP-ZZ-XX-TN-Y-0029 Revision Date Filename JFH -ARP-ZZ-XX-TN-Y-0029.docx P 1 08 June Description S3: Review/approval 2017 Prepared by Checked by Approved by Alastair Young/ Name Alex Welch Andrew Jenkins Phill Ayres Signature P2 23 Jun Filename JFH -ARP-ZZ-XX-TN-Y-0029.docx 2017 Description S4: for Stage Approval Prepared by Checked by Approved by Alastair Young/ Name Alex Welch Andrew Jenkins Phill Ayres Signature Filename Description Prepared by Checked by Approved by Name Signature Filename Description Prepared by Checked by Approved by Name Signature Issue Document Verification with Document JFH-ARP-ZZ-XX-TN-Y-0029 | P2 | 23 June 2017 J:\237000\237035-00\4 INTERNAL PROJECT DATA\4-50 REPORTS\31 TRANSPORT\STAGE 2\TN6 - MITIGATION\JFH-ARP-ZZ-XX-TN-Y-0029.DOCX States of Jersey Jersey Future Hospital Technical Note 6: Mitigation Contents Page 1 Introduction 1 1.1 Background 1 1.2 Future Scenarios 3 2 Junction Assessments 4 2.1 Junction 1/3/8/12/13/14: Esplanade Network 4 2.2 Junction 4: Elizabeth Place/Rouge Bouillon/Saville Street 15 2.3 Junction 5: The Parade/Union Street 17 2.4 Junction 6: St Aubin’s Road/A1 19 2.5 Junction 7: St Aubin’s Road/Kensington Street/Peirson Road 21 2.6 Junction 10: St Aubin’s Road/Westmount Road 22 2.7 Junction 11: St Johns Road/Old St Johns Road/West Park Avenue/Cheapside 23 2.8 Junction 13: Gloucester Street/Seaton Place Pedestrian Crossing 25 2.9 Junction 14: Gloucester Street/Newgate Street 26 2.10 Junction 15: Lewis Street/Kensington Place 28 2.11 Junction 16: Lewis Street/Kensington Street 28 3 Mitigation Summary 29 4 Future Junction Modelling Summary 31 JFH-ARP-ZZ-XX-TN-Y-0029 | P2 | 23 June 2017 J:\237000\237035-00\4 INTERNAL PROJECT DATA\4-50 REPORTS\31 TRANSPORT\STAGE 2\TN6 - MITIGATION\JFH-ARP-ZZ-XX-TN-Y-0029.DOCX States of Jersey Jersey Future Hospital Technical Note 6: Mitigation 1 Introduction 1.1 Background Ove Arup & Partners Ltd (Arup) is preparing a Transport Assessment on behalf of Jersey Future Hospital in support of a planning application for the development of a new hospital and associated works in St Helier, Jersey. The development site includes land partially occupied by the existing Jersey General Hospital. Following discussions with the Department for Infrastructure (DfI) Transport Policy it has been agreed that a series of technical notes would be submitted for comment prior to the submission of the outline planning application, providing opportunity for a number of the technical matters to be resolved. The proposed technical notes will consider the following topics: Technical Note 1: Background Traffic Growth; Technical Note 2: Trip Distribution; Technical Note 3: Base Transport Study; Technical Note 4: Base Junction Models; Technical Note 5: Trip Generation; and Technical Note 6: Mitigation Proposals. This Technical Note, Base Junction Models (TN6) details the results of the junction assessments undertaken for the 2025 future scenarios. Junction assessments have been undertaken for 14 junctions over 11 models, using LinSig for signalised junctions, ARCADY for roundabouts, and PICADY software for priority junctions. Junction models and output files have also been made available to DfI Transport Policy. To obtain traffic flow data, classified traffic turning count surveys were all undertaken on 19th October 2016 aside from the following: Esplanade/Kensington Place priority junction was surveyed on 30th November 2016; Gloucester Street/Seaton Place/Patriotic Street Signalised Junction was surveyed on 7th February 2017. Signal specification sheets were provided by the Department for Infrastructure for each of the signalised junctions and used to directly inform the staging and phasing within the LinSig models. The junctions that have been tested within this note have been previously agreed with DfI Transport Policy, are detailed in Table 1 and illustrated in Figure 1. JFH-ARP-ZZ-XX-TN-Y-0029 | P2 | 23 June 2017 Page 1 J:\237000\237035-00\4 INTERNAL PROJECT DATA\4-50 REPORTS\31 TRANSPORT\STAGE 2\TN6 - MITIGATION\JFH-ARP-ZZ-XX-TN-Y-0029.DOCX States of Jersey Jersey Future Hospital Technical Note 6: Mitigation Table 1: Summary of Junctions to be assessed Ref: Junction Junction Model Future Model 1 Gloucester Street/Esplanade signalised junction LinSig 2 Elizabeth Place/The Parade/Elizabeth Place/Cheapside No model required - 3 Peirson Road/Victoria Avenue/Esplanade/A1 St LinSig Aubin’s Road 4 Rouge Bouillon/Savile Street/Elizabeth Place/Parade LinSig Road signalised junction 5 Union Street/The Parade signalised junction LinSig 6 St Aubin’s Road/A1 Roundabout ARCADY 7 St Aubin’s Road/Kensington Street/Peirson Road PICADY junction 8 The Esplanade/Patriotic Street No model required - 9 The Parade/Gloucester Street No model required - 10 St Aubin’s Road/Westmount Road priority junction PICADY - 11 St. John's Road/West Park Avenue/Cheapside/ Old PICADY Saint John's Road staggered priority junction 12 Esplanade/Kensington Place; LinSig 13 Gloucester Street/Seaton Place/Patriotic Place LinSig signalised junction 14 Newgate Street/Gloucester Street priority junction PICADY 15 Lewis Street/Kensington Place PICADY 16 Lewis Street/Kensington Street PICADY JFH-ARP-ZZ-XX-TN-Y-0029 | P2 | 23 June 2017 Page 2 J:\237000\237035-00\4 INTERNAL PROJECT DATA\4-50 REPORTS\31 TRANSPORT\STAGE 2\TN6 - MITIGATION\JFH-ARP-ZZ-XX-TN-Y-0029.DOCX States of Jersey Jersey Future Hospital Technical Note 6: Mitigation Figure 1: Junction locations and type 1.2 Future Scenarios The following scenarios have been used to assess traffic on the local road network: 2016 Base: Includes existing trips associated with Jersey General Hospital; 2025 Do Minimum: 2025 with Jersey General Hospital; 2025 Construction Closures: 2025 with Jersey General Hospital, relocation schemes, traffic direction reversed on Lewis Street, two-way traffic on Patriotic Place and road closures on Kensington Place and Newgate Street; and 2025 Do Something: 2025 with Jersey Future Hospital proposals. Two further scenarios were used to assess the junctions during the construction phase of JFH, but were later discounted as a result of the modelling, in favour of the 2025 Construction Closures scenario. The two scenarios were; 2025 Construction MSCP: operating the Patriotic Street Multi Storey Car Park as entry only from Kensington Place with a single exit on Patriotic Street. JFH-ARP-ZZ-XX-TN-Y-0029 | P2 | 23 June 2017 Page 3 J:\237000\237035-00\4 INTERNAL PROJECT DATA\4-50 REPORTS\31 TRANSPORT\STAGE 2\TN6 - MITIGATION\JFH-ARP-ZZ-XX-TN-Y-0029.DOCX States of Jersey Jersey Future Hospital Technical Note 6: Mitigation As part of this scenario, traffic flow on Patriotic Place was reversed, with both lanes being used to approach the junction with Gloucester Street. 2025 Construction KP2W: extending two-way operation of Kensington Place to its junction with Esplanade. This required changing the existing single lane, one-way road to a two-way road, allowing vehicles to turn onto Esplanade. Both scenarios have a lower network PRC compared to the original 2025 Construction Scenario and were therefore not progressed further. 2 Junction Assessments 2.1 Junction 1/3/8/12/13/14: Esplanade Network The Esplanade/A1 model considers several junctions as part of a network of signalised junctions. This is due to the close proximity of the junctions and their potential to impact on one another. A summary of the junctions used in future models are as follows: Junction 1: Esplanade/Gloucester Street; Junction 3: Peirson Road/Victoria Avenue/Esplanade/A1 St Aubin’s Road; Junction 8*: Esplanade/Patriotic Street Junction 12: Esplanade/Kensington Place; Junction 13: Gloucester Street/Seaton Place/Patriotic Place; and Junction 14: Newgate Street/Gloucester Street *A model for Junction 8 is not required but has been included within the Esplanade network to show traffic that turns left onto Patriotic Place. JFH-ARP-ZZ-XX-TN-Y-0029 | P2 | 23 June 2017 Page 4 J:\237000\237035-00\4 INTERNAL PROJECT DATA\4-50 REPORTS\31 TRANSPORT\STAGE 2\TN6 - MITIGATION\JFH-ARP-ZZ-XX-TN-Y-0029.DOCX States of Jersey Jersey Future Hospital Technical Note 6: Mitigation F 1 Arm J4:5 - St Aulbin's Rd J4:5/1 Arm J4:2 - St Aubin's Rd E D 2 J4:2/1 J4:2/2 1 Arm J4:4 - Esplanade J4:4/2 J4:4/1 Arm J4:1 - Vicotria Ave 1 1 2 J4:3/1 J4:1/1 J4:1/2 J4:1/3 1 2 Arm J4:3 - Peirson Rd J 3 J4: Esplanade/Victoria Ave/St Aubins Rd/Peirson Rd PRC: 5.3 % Total Traffic Delay: 38.5 pcuHr I Controller: 3 Arm J6:2 - Newgate Street Arm J4:6 - Esplanade Arm J6:1 - Gloucester Street J6:2/1 4 3 C 2 J4:6/4 1 J6: Newgate Street/Gloucester Street J4:6/3 1 PRC: 78.6 % 1 J4:6/2 Total Traffic Delay: 6.1 pcuHr J4:6/1 Arm J3:2 - Esplanade J6:1/2 Controller: 5 J3:3/1 J6:1/1 J3:2/1 2 J3:2/2 1 J3:2/3 1 J2: Esplanade/Patriotic St 2 PRC: 131.4 % 3 Total Traffic Delay: 0.9 pcuHr Arm J3:3 - Kensington Pl G B Arm J5:4 - Patriotic Place 1 2 1 J5:4/2 Arm J5:2 - Gloucester