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I-65 Contra-Flow Plan

I-65 Contra-Flow Plan. 2010 Hurricane Season Alabama Department of Transportation. Hurricane Evacuation Map. Contra-Flow plan developed by ALDOT in 2000 Daytime Operation with Night-time Capability Annual Review of Plan with ALDOT, DPS and Others Annual Exercise ALDOT Call Center

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I-65 Contra-Flow Plan

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  1. I-65 Contra-Flow Plan 2010 Hurricane Season Alabama Department of Transportation

  2. Hurricane Evacuation Map

  3. Contra-Flow plan developed by ALDOT in 2000 • Daytime Operation with Night-time Capability • Annual Review of Plan with ALDOT, DPS and Others • Annual Exercise • ALDOT Call Center • Two Implementations – Ivan & Dennis History - Operation - Details

  4. Level 1 – June 1st Level 2 – NWS Hurricane Watch Gulf Coast Level 3 – NWS Hurricane Warning Gulf Coast Level 4 – Enact Plan Activation Levels

  5. LevelNumber Actions by CO, 6th, 9th Master Step Number Actions at Initial Crossover Actions at Interchanges

  6. Individual Checklist Date / Time Completed Step # - Matches Master Checklist Outlined Text Indicates Contact with CO / Division

  7. Traffic Control Plans SL Radio Numbers Personnel Law Enforcement List & Placement of Traffic Control Devices

  8. Detour Contra – Flow Detour – US 31 Detour Signs During CF

  9. Interchanges All Interchanges Manned • Department of Transportation • Department of Public Safety • National Guard (Augmentation)

  10. Initially - Traffic Responsive Contra-Flow Plan • Then – Schedule Based • 2008 – Back to Traffic Responsive • Manpower Issues (All Agencies) • Scheduling Issues With Other Agencies • Difficult Response Times to Traffic Conditions • Not Cost Effective Type of Trigger

  11. Normal N-S Traffic on I-65 Alabama Department of Transportation

  12. Stop SB Traffic Alabama Department of Transportation

  13. SB Lanes Empty … we think Alabama Department of Transportation

  14. Drive South on SB Lanes Alabama Department of Transportation

  15. Drive North on SB Lanes Alabama Department of Transportation

  16. SB Lanes Clear Alabama Department of Transportation

  17. Contraflow on SB Lanes Alabama Department of Transportation

  18. Public wants to drive in an evacuation the same way they do during “normal” travel • “Normal” travel speeds are not best for evacuation • “Full” lanes move the largest number of cars at an average speed of 45-50 mph. • Slower speed reduces number of accidents • Accidents that do happen are less severe and traffic recovery is faster Evacuations Should Support Safety of the Public - Not Driver Convenience

  19. Evacuation numbers depend on: • Mandatory and voluntary evacuations • Large and small storms • Summer or Fall • Contraflow is dangerous when traffic counts are too low • Excessive speed encouraged by light traffic • Empty lanes encourage driving in the wrong direction (force of habit) Nighttime traffic volume is very low on I-65 during hurricane evacuations

  20. 7 PM Date of Landfall: 9-16-2004 Hurricane Ivan – September 2004

  21. 7 PM Date of Landfall: 7-10-2005 No Contraflow (24,782 veh) Contraflow (28,431 veh) Hurricane Dennis – July 2005

  22. 7 PM Date of Landfall: 8-29-2005 Hurricane Katrina – August 2005

  23. US-31 not adequate to handle southbound traffic diverted from I-65 • Impacts evacuation efforts and pre-storm movement of relief supplies • Mobile plans to evacuate special needs personnel on busses using multiple round trips • Restoring normal traffic flow at night will help minimize negative impact Extended Contraflow Restricts Pre-Storm Emergency and Relief Movement

  24. Hurricane Dennis Hurricane Katrina 1 day before landfall (4845 veh) 1 day before landfall (1937 veh) Date of Landfall: 7-10-2005 Date of Landfall: 8-29-2005 Extended Contraflow Restricts Pre-Storm Emergency and Relief Movement

  25. Q U E S T I O N S ?

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