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TRANSPORTATION SOLUTIONS: GETTING THE MOST BANG FOR YOUR BUCK! GPA Fall Conference 2013

TRANSPORTATION SOLUTIONS: GETTING THE MOST BANG FOR YOUR BUCK! GPA Fall Conference 2013 Garth Lynch, PE, AICP HNTB Corporation October 10, 2013. Agenda. Overview of study Identification of bottlenecks Potential operational strategies Project prioritization Next steps.

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TRANSPORTATION SOLUTIONS: GETTING THE MOST BANG FOR YOUR BUCK! GPA Fall Conference 2013

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  1. TRANSPORTATION SOLUTIONS: GETTING THE MOST BANG FOR YOUR BUCK! GPA Fall Conference 2013 Garth Lynch, PE, AICP HNTB Corporation October 10, 2013

  2. Agenda Overview of study Identification of bottlenecks Potential operational strategies Project prioritization Next steps

  3. Metro Atlanta OPS OVERVIEW OF STUDY

  4. Study Area All limited access facilities in metro Atlanta Emphasis on improving the Interstate mainline

  5. Objectives Identify bottleneck areas Identify and evaluate potential low-cost improvements Quick implementation – 6 months to 5 years Document a prioritized list of operational projects

  6. Metro Atlanta OPS IDENTIFICATION OF BOTTLENECKS

  7. Identification of Bottleneck Locations HERO

  8. Causes of Bottlenecks High volumes Weaving Lane drops/additions Last minute decision making Lack of storage on ramps and/or high turn volumes Tight turning radii and/or steep grade on ramps Frontage road access Limited access facility terminates at signalized intersection Suspected drainage issues

  9. Identified Bottleneck Locations

  10. Metro Atlanta OPS POTENTIAL STRATEGIES

  11. Potential Strategies • Added Corridor Capacity (MLIP) • Improved Design Geometrics • Intelligent Transportation Systems • Freight • Demand Management & Policy Considerations

  12. System-wide Strategies for Consideration • Expand ITS • Advanced queue warning signs • Variable speed limits • Dynamically shoulder usage • Upgrade CCTV cameras / traffic flow monitoring • Increase crash investigation sites • Modify ramp meters to permit 2 cars per green • Expand quick response incident clearance • Expand HERO units • Modify truck lane restrictions

  13. Types of Location-Specific Strategies for Consideration • Variable / dynamic ramp closures (closed to all vehicles v. closed to unauthorized vehicles) • Auxiliary lanes (new or using shoulder) • Collector / distributor roads • Modifications to frontage road access • Channelization • Re-striping • Interchange reconfigurations (Diverging Diamond Interchanges, etc.)

  14. Types of Location-Specific Strategies for Consideration • Turning prohibitions • Additional ramp meters • Modify existing ramp meter operations • Modify ramp geometrics, with a focus to better accommodate trucks • Automated truck rollover warning systems • Ramp meter bypass lanes for transit and vanpools

  15. Potential Strategies Potential Solutions: 71 operational strategies (13 types) at 45 locations

  16. Active Traffic Management (ATM) Lane Control Signals During an Incident Source: FHWA Best Practices for Road Weather Management: Minnesota DOT I-35W Smart Lanes: Active Traffic Management. Located at: http://ops.fhwa.dot.gov/publications/fhwahop12046/rwm17_minnesota1.htm

  17. Active Traffic Management (ATM) ATM Sign Example Variable Speed Limit Sign Example Source: Washington State Department of Transportation Smarter Highways: http://www.wsdot.wa.gov/smarterhighways/

  18. Ramp Meter Bypass Lane for Transit

  19. Innovative InterchangeReconfiguration Options Diverging Diamond Interchange (DDI) Modified Displaced Left Turn Partial DDI

  20. I-75 / I-85 (Downtown Connector)at Williams St From Option 1: Prohibit left turn at Ivan Allen Jr Blvd Option 2: Provide SB right turn arrow & re-stripe taper To N Option 3: Add 2nd right turn lane from Ivan Allen Jr Blvd to Williams St Ivan Allen Jr. Blvd Option 4: Allow 2nd right turn/thru lane Williams St. Williams St. Option 1: Left turns would shift to W Peachtree Pl Ivan Allen Jr. Blvd W Peachtree Pl W Peachtree Pl Source: Google

  21. Strategies Being Considered by Cost Range • OPS projects being input into project prioritization process • 71 projects totaling approximately $159 M

  22. Metro Atlanta OPS PROJECT PRIORITIZATION

  23. Project Prioritization StructureGoals

  24. National & State Goals

  25. Local Goals

  26. Project Prioritization Structure

  27. Preliminary Project Prioritization Structure

  28. Metro Atlanta OPS NEXT STEPS

  29. Next Steps

  30. www.dot.ga.gov\MLIP Kyle Mote GDOT Office of Planning (404) 631-1987 kmote@dot.ga.gov

  31. SR 400 at Holcomb Bridge Rd (SR 140) Option 1: Add right turn lane and one thru lane N Dogwood Rd. Added Thru Lane Thru Lane SB Off-Ramp Added Right Turn Lane Holcomb Bridge Rd. Source: Google

  32. I-85 North at Hamilton Mill Rd Proposed Existing N Step 2: Eliminate one SB lane and add NB lane Step 1: Create indirect left turn intersection and eliminate SB left turn Braselton Hwy. SR 124 SR 124 Braselton Hwy. Step 3: Create free flow right turn lane Hamilton Mill Rd. Hamilton Mill Rd. Source: Google Source: GA GIS Clearinghouse

  33. I-285 S at I-85 S Interchange Option 1a: Widen and restripe existing merge from I-85 NB to create two-lane on-ramp N Option 1b: Restripe Old National Hwy. On-ramp US 29 I-85 NB Old National C/D Source: Google

  34. I-285 W / I-20 W Option 1: Drop mainline lane on I-20 WB to I-285 SB N Option 1: Add 2 mainline lanes on I-20 WB from I-285 SB/NB Option 2: Create new C/D road and continue ramps onto new bridge over I-285 Source: GA GIS Clearinghouse

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