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A Focus Technology of the

A Focus Technology of the American Association of State Highway and Transportation Officials (AASHTO) Technology Implementation Group (TIG). CABLE MEDIAN BARRIER Best Practices Guidelines. Cable Median Barrier. Share & Sponsor Technology Transfer Promote Transportation Advancements

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A Focus Technology of the

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  1. A Focus Technology of the American Association of State Highway and Transportation Officials (AASHTO) Technology Implementation Group (TIG) CABLE MEDIAN BARRIER Best Practices Guidelines

  2. Cable Median Barrier Share & Sponsor Technology Transfer Promote Transportation Advancements Encourage Implementation

  3. Cable Median Barrier Why Median Barriers …. 200 Miles of Highway = 1 Crossover Fatality 250 Killed Annually in Crossover Crashes 23,139 Road Departure Fatalities 16,214 Fatalities from Run-Off-The-Road Crashes 740,000 Road Departure Injury Crashes 267 Crossover Head-On Fatal Collisions

  4. Cable Median Barrier What Is Cable Barrier … Safe Effective Cost Efficient Proven Results Replaceable

  5. Cable Median Barrier Why Cable Median Barrier? And Why Now? R E S U L T S

  6. Cable Median Barrier 20 Reported Cable Median Barrier Impacts 0 Penetrations – 0 Crossover Fatalities (May 2005 thru April 2006) Cable Barrier Installed Fatalities Crossover Crashes First vehicle to impact cable barrier (March 2005) No Injuries 2001 2002 2003 2004 2005

  7. Cable Median Barrier Minimize Cross-Median Crashes Lower Deflection Rates Less Maintenance Residual Safety Value Lower Market Prices

  8. Cable Median Barrier “For every one fatal across median crash there were 10 non-fatal across median crashes.” “Median Barriers in North Carolina,” AASHTO Subcommittee on Design, 2006

  9. Cable Median Barrier Across-Median Crashes Decreased or Eliminated Lives Saved Millions in Crash Cost Savings Fatal Crashes Fatalities 1994-1998 1999-2003

  10. Cable Median Barrier Issues & Concerns: Barrier Costs Generic Cable $8.33/Foot High Tension Cable $12.23/Foot W-Beam $13.65/Foot Pre-Cast Concrete $24.64/Foot Single Slope Concrete $44.94/Foot Cast in Place Concrete $79.36/Foot

  11. Cable Median Barrier Issues & Concerns: The Choices Trinity Cable Safety Systems (CASS) Safence Nucor Marion U.S. High Tension Gibraltar Cable Barrier Brifen Wire Rope Safety Fence

  12. Cable Median Barrier Issues & Concerns: Maintenance & Repair Barrier Hits Per Mile Cost Recovery Frequency of Repair Cable Downtime Moving Tension, Temperature & Elasticity

  13. Cable Median Barrier Issues & Concerns: Roadway Design Cable Type Cable Placement Barrier Design Transition from Cable to Other Types of Systems

  14. Cable Median Barrier Case Study: Utah Department of Transportation Lessons Learned: • Compacted surface • Facilitate winter maintenance and avoid erosion • Foundation sockets flush to ground • 1:6 steepest slope • System hits effective

  15. Cable Median Barrier Case Study: Ohio High Tension System 10’ Offset from Ditch Centerline 6:1 Slope Socketed System Cable Heights

  16. Cable Median Barrier Case Study: North Carolina 70’ Median Width or Less 500 Miles of Low Tension Barrier 14’ Designed Deflection 4’ Offset from Ditch Line 8’ Offset at 60’ Median Widths Cable Height Design Specifications Median Barrier Drawings

  17. Cable Median Barrier Case Study: Texas • High Tension Cable System • 6:1 Slope • Standard Details and Specifications • Cable Barrier Behind W-Beam • 10’ to 12’ Off Edgeline

  18. Cable Median Barrier Case Study: Washington • Cable Height • Pre-Cast Concrete Barrier • NCHRP 350 Test Level 3 • High Tension and Low Tension • 6:1 Slope and 10” Offset • 70 Miles in 8 Counties

  19. Cable Median Barrier Issues & Concerns: Motorcycle Safety Barrier Performance Percent Percent Barrier TypeTotal Collisions Injury Collisions Fatal Collisions Concrete 40 85% 7.5% Beam Guardrail 65 81.5% 9.2% Bridge Rail 10 80% 10% Washington State Highways, 2003-2004

  20. Cable Median Barrier Resources Available: AASHTO TIG Web Site • Contact Information • Challenges • Roadway Design Issues • Maintenance Issues • Benefits & Evaluations • System Threats You’ll also find links to: Lead States Team Studies FHWA Evaluation Texas Transportation Institute Vendors And more ….

  21. Cable Median Barrier Resources Available: The Lead States Team North Carolina Kevin Lacy (919) 733-3915 jklacy@dot.state.nc.us Terry Hopkins (919) 715-7818 thopkins@dot.state.nc.us Brian Mayhew (919) 715-7818 bmayhew@dot.state.nc.us Shawn Troy (919) 733-5692 story@dot.state.nc.us Brian Murphy (919) 755-3668 bgmurphy@dot.state.nc.us Roger Thomas (919) 250-4016 rthomas@dot.state.nc.us Scott Capps (919) 733-3725 scapps@dot.state.nc.us Washington Dick Albin (360) 705-7451 albind@wsdot.wa.gov Ohio Dean Focke (614) 466-2847 dean.focke@dot.state.oh.us Utah Rob Clayton (801) 964-4521 robertclayton@utah.gov Texas Rory Meza (512) 416-2678 ameza@dot.state.tx.us

  22. Cable Median Barrier Resources Available: For the Media

  23. Cable Median Barrier Resources Available: Evaluations, Case Studies & More

  24. Cable Median Barrier Resources Available: To Learn More AASHTO TIG http://www.aashtotig.org Federal Highway Admininstration: http://www.safety.fhwa.dot.gov Brifen U.S.A. http://www.brifenusa.com Gibraltar http://gibraltartx.com Nucor Steel Marion http://nsmarion.com Safence http://www.safence.com Trinity http://www.highwayguardrail.com

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