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Design versus Planning

Design versus Planning. Presented by: Bill Kenny, Director, Highway Design, Project Management and Training Section, Technical Standard Branch. What is the difference between Design and Planning?. Objectives – purpose Time Frame Design Parameters Tools Output - documentation.

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Design versus Planning

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  1. Design versus Planning Presented by: Bill Kenny, Director, Highway Design, Project Management and Training Section, Technical Standard Branch

  2. What is the difference between Design and Planning? • Objectives – purpose • Time Frame • Design Parameters • Tools • Output - documentation

  3. Case Study – Bergthal Road Interchange on Highway 2. Red Deer Didsbury Bergthal Road Carstairs Calgary

  4. Functional Planning Study Hwy 2 • 2008, a FPS by consultant at the proposed interchange location; • Highway 2 – between Calgary and Edmonton, freeway standard; • Projected AADT – in the year of 2026 Bergthal Road

  5. Functional Planning Study (Con’t)

  6. Functional Planning Study (Con’t) Northbound

  7. Functional Planning Study (Con’t) Southbound

  8. Functional Planning Study (Con’t) Westbound

  9. Functional Planning Study (Con’t) Eastbound

  10. Functional Planning Study (Con’t)

  11. Functional Planning Study (Con’t) • Ultimate stage layout and ramp terminal intersection layout – WSB&ENB LT bays on Bergthal Road;

  12. Functional Planning Study (Con’t) • Cost Estimates: • Stage 1 – Flyover: $28.6 million; • Stage 2 – Diamond: additional $12.2 million, and • Ultimate Stage – Parclo A: additional $15.6 million • In total – CAD $56.4 million in 2007 dollars

  13. AT Detailed Design • Based on the projected AADT, simple diamond interchange works well after 20 years. Stop-controlled intersections at ramp terminals. • In the long term, dumbbell interchange with 2-lane roundabout at each ramp terminal.

  14. AT Detailed Design (Con’t) • Narrow the structure width; • Purchase enough land to accommodate the future dumbbell interchange footprint; • Roundabouts are safer if signals are required in the long term

  15. AT Detailed Design (Con’t) • Construction cost estimate: • Common excavation: 381,000 m3; • Borrow excavation: 794,000 m3; • GBC: 86,000 t; • ACP: 35,000 t; • Total cost: 22 millions in 2011 CAD, compared to the FPS 28.6 millions for the flyover in stage one; 40.8 millions for the simple diamond interchange; and 56.4 millions for the Parclo “A” interchange

  16. AT Detailed Design (Con’t)

  17. QUESTIONS? Basic layout and land acquisition protects for future growth.

  18. Lesson Learned • Plan and Design according to the travel demand; • Design must meet current Design Guidelines; • Apply Economic Analysis principles to design; • Negotiate/agree with landowners at Planning stage; • Do more detailed geotechnical study at Planning stage to avoid long distance borrow sites.

  19. Highway 63 Twinning- differences between planning and design • Due to low AADT and budget constraint • Defer service roads • Allow direct access temporarily • Eliminate cross-overs • Eliminate intersection treatments for single use accesses • Minimize realignment to reduce utility relocations • Reduce roadway width

  20. Proposed width at time of construction = 12.4m

  21. Width after one 80 mm overlay

  22. Conclusion • Designers need to re-examine findings in planning study. • Look for efficiencies while preserving: • safety, • functionality and • flexibility for unpredictable future developments. • Questions?

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