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Traffic and Transport GREAT WESTERN HIGHWAY UPGRADE, MOUNT VICTORIA TO LITHGOW ALLIANCE FORTY BENDS UPGRADE – REVIEW OF ENVIRONMENTAL FACTORS TECHNICAL PAPER 8 TRAFFIC AND TRANSPORT OCTOBER 2012 Great Western Highway Upgrade, Mount Victoria to Lithgow Alliance Forty Bends Upgrade REF Technical Paper 8: Traffic and Transport Contents 1. Introduction 1 1.1. Proposal description 1 1.2. Proposal objectives 3 1.3. Scope of this report 4 1.4. Methodology 4 1.5. Proposal study area 4 1.6. Report structure 6 2. Existing condition assessment 7 2.1. Road network 7 2.2. Traffic volumes and vehicle composition 9 2.3. Road network performance 10 2.4. Intersection layouts 12 2.5. Intersection performance 15 2.6. Local resident access 18 2.7. Land uses 18 2.8. Pedestrian and cycle access 21 2.9. Public transport services 21 2.10. Vehicle rest areas 22 2.11. Emergency services access 22 2.12. Historical crash data 23 2.13. Road safety 25 3. Future condition assessment 27 3.1. Without upgrade 27 3.2. With upgrade 28 3.3. Intersection performance 36 3.4. Access management principles 40 3.5. Potential impacts to access 41 3.6. Future development in the local area 41 3.7. Future strategic transport considerations 42 4. General road safety assessment 43 4.1. Managed access 43 4.2. Intersection upgrades 43 4.3. Improved road geometry and sight distance 43 4.4. Black ice 44 5. Construction traffic and staging 45 5.1. Working hours and duration of work 45 5.2. Construction workforce 45 5.3. Construction staging 45 5.4. Resource consumption 46 TR-0695-C.doc Page ii Great Western Highway Upgrade, Mount Victoria to Lithgow Alliance Forty Bends Upgrade REF Technical Paper 8: Traffic and Transport 5.5. Road and lane closures 46 5.6. Construction traffic volumes 46 5.7. Construction traffic volume impacts 47 5.8. Restricted access vehicles (RAVs) 49 5.9. Over-dimension vehicles 50 5.10. Construction compounds, stockpile sites and quarries 50 5.11. Construction access 52 5.12. Traffic management, control and signage 52 5.13. Intersection performance and operation during construction 52 5.14. Impacts to local residents 53 6. Mitigation measures and strategies during construction 55 6.1. Information to local residents 55 6.2. Construction traffic management plan 55 6.3. Vehicle movement plan 58 7. Conclusion 59 8. References 61 TR-0695-C.doc Page iii Great Western Highway Upgrade, Mount Victoria to Lithgow Alliance Forty Bends Upgrade REF Technical Paper 8: Traffic and Transport List of Tables Table 2-1: Existing (2011) traffic volumes and composition 10 Table 2-2: Level of Service (LoS) and threshold peak hour flow on two-lane rural road in 100 km/h zone 11 Table 2-3: Existing (2011) peak hour flow on two-lane rural road (veh/hr) 12 Table 2-4: Existing intersection layouts and their description 13 Table 2-5: RMS Levels of Service 16 Table 2-6: 2011 Intersection performance 17 Table 3-1: 2015 forecasted traffic volumes and road performance without the upgrade 27 Table 3-2: 2025 forecasted traffic volumes and road performance without the upgrade 28 Table 3-3: 2035 forecasted traffic volumes and road performance without the upgrade 28 Table 3-4: 2015 forecasted traffic volumes and road performance with the upgrade 30 Table 3-5: 2025 forecasted traffic volumes and road performance with the upgrade 30 Table 3-6: 2035 forecasted traffic volumes and road performance with the upgrade 31 Table 3-7: 2015 Intersection performance without upgrade 37 Table 3-8: 2025 Intersection performance without upgrade 37 Table 3-9: 2035 Intersection performance without upgrade 38 Table 3-10: 2015 Intersection performance with upgrade 38 Table 3-11: 2025 Intersection performance with upgrade 39 Table 3-12: 2035 Intersection performance with upgrade 39 Table 5-1: Construction traffic types and volumes 47 Table 5-2: 2013 Intersection performance without construction traffic 48 Table 5-3: 2013 Intersection performance with construction traffic 49 Table 6-1: Mitigation measures for construction traffic impacts 57 TR-0695-C.doc Page iv Great Western Highway Upgrade, Mount Victoria to Lithgow Alliance Forty Bends Upgrade REF Technical Paper 8: Traffic and Transport List of Figures Figure 1-1: Forty Bends proposal study area 5 Figure 2-1: Road network 8 Figure 2-2: Great Western Highway and McKanes Falls Road Intersection 13 Figure 2-3: Great Western Highway and Forty Bends Road Intersection – western connection 14 Figure 2-4: Great Western Highway and Forty Bends Road Intersection – eastern connection 15 Figure 2-5: Land uses in the project corridor 20 Figure 2-6: Crash locations within the study area based on crash data between January 2004 and December 2010 24 Figure 3-1: Proposed Great Western Highway and Forty Bends Road Intersection – western connection 33 Figure 3-2: Proposed Great Western Highway and Forty Bends Road Intersection – eastern connection 34 Figure 3-3: Proposed Great Western Highway and McKanes Falls Road Intersection 35 Figure 3-4: Proposed McKanes Falls Road U-turn facility 36 Figure 5-1: Locations of potential compound and/or stockpile sites 51 Appendix A - RMS Restricted Access Vehicle Maps Appendix B - 2011 SIDRA Movement Summaries Appendix C - 2015 SIDRA Movement Summaries Appendix D - 2025 SIDRA Movement Summaries Appendix E - 2035 SIDRA Movement Summaries Appendix F - 2013 SIDRA Movement Summaries TR-0695-C.doc Page v Great Western Highway Upgrade, Mount Victoria to Lithgow Alliance Forty Bends Upgrade REF Technical Paper 8: Traffic and Transport 1. Introduction The Roads and Maritime Services (RMS) is preparing a Review of Environmental Factors (REF) as part of the Great Western Highway upgrade at Forty Bends. The REF comprises the environmental assessment under Part 5 of the NSW Environmental Planning and Assessment Act 1979 (EP&A Act) and addresses the environmental impacts of the proposal. This report specifically addresses the likely traffic and transport impacts of the proposal. 1.1. Proposal description The proposal forms part of a series of ongoing upgrades of the Great Western Highway. The Great Western Highway is the main road link between Sydney and Lithgow and beyond to the Central West of New South Wales. The Great Western Highway serves as: A key freight route between Sydney and the central west of NSW, including the timber insustry in the Oberon area. A tourist route with destinations including the Blue Mountains, historic Hartley, Jenolan Caves, Mudgee and Bathurst. A connection between the many towns and villages along its length. Key features of the proposal are: The proposal has been developed based on the concept design that has been prepared using the available information and current design standards and criteria for the Great Western Highway upgrade program. Some elements of the design may be further refined during detailed design. The key elements of the Construction of a new road alignment consisting of generally three lanes with two lanes eastbound to the east of Whites Creek and two lanes westbound to the west of Whites Creek. Lane widths would be 3.5 metres with shoulder widths typically varying between 1.0 metres and 2.5 metres. The upgrade alignment would diverge up to 40 metres south of the existing Great Western Highway in the vicinity of Whites Creek. The design speed for the alignment would be 100 kilometres per hour east of McKanes Falls Road and 80 kilometres per hour west of McKanes Falls Road. The posted speed limit for the whole of the new highway alignment would be 80 kilometres per hour. Widening of the existing alignment predominantly to the south of the Great Western Highway. The total proposal footprint of the widening works would vary from about 40 metres to 90 metres. A central median along the length of the proposal of varying widths, ranging up to 9.5 metres. Carriageways would be separated by a combination of vegetated, depressed and paved medians. TR-0695-C.doc Page 1 Great Western Highway Upgrade, Mount Victoria to Lithgow Alliance Forty Bends Upgrade REF Technical Paper 8: Traffic and Transport Construction of new twin, five-span bridges, about 150 metres in length across Whites Creek. The new bridges would comprise four lanes, each 3.5 metres in width, with two lanes carrying traffic in each direction. The total width of the two bridges would be about 30 metres. Shoulders on the bridges would be between 2.5 and 3.25 metres (off-side) and 1.0 metres on the near side. Rehabilitation works along the existing alignment of Whites Creek following the removal of the redundant section of the existing Highway. This would include creating a rehabilitated, natural creek bed in this location linking the existing alignment of Whites Creek prior to passing under the new Whites Creek bridge. Upgrades to four existing local road intersections, including two intersections with Forty Bends Road, Daintree Close and McKanes Falls Road, to provide connection to the upgraded highway and property access points. Upgrades would include minor widening and u-turn facilities located along the western end of Forty Bends Road and about 150 metres south of the intersection of the Great Western Highway and McKanes Falls Road. New or improved access from the existing highway to nine properties along the length of the proposal. The proposal includes provision of new or reconstructed driveways to retain existing property access. Closure and relocation of two intersections of Forty Bends Road with the Great Western Highway. These include: Closure of the existing intersection at the eastern end of Forty Bends Road to general traffic (except for emergency vehicles) and a new cul-de-sac constructed on Forty Bends Road.
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