MASH Impact - Ohio Department of Transportation · 2017-10-31 · isiissis MASH? Manual for...
Transcript of MASH Impact - Ohio Department of Transportation · 2017-10-31 · isiissis MASH? Manual for...
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MASH MASH MASH MASH ImpactImpactImpactImpact
OTEC 2017
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What What What What isisisis MASH?MASH?MASH?MASH?
Manual for Assessing Safety Hardware
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WhWhWhWhat fixed objects do people hit?at fixed objects do people hit?at fixed objects do people hit?at fixed objects do people hit?
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WhatWhatWhatWhat isisisisMASH?MASH?MASH?MASH?
• 2009 MASH released
• 2017 FHWA and AASHTO agreed on NCHRP-350 sunset date.
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MASH Test MatrixMASH Test MatrixMASH Test MatrixMASH Test Matrix
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MASH Test MatrixMASH Test MatrixMASH Test MatrixMASH Test Matrix
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MASH Test MatrixMASH Test MatrixMASH Test MatrixMASH Test Matrix
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ODOT StandardsODOT StandardsODOT StandardsODOT Standards
▪ All permanent installations on NHS in Ohio – TL-3
▪ Barrier on Structures – TL-4
▪ Large truck considerations – TL-5 / TL-6
Class Vehicle Speed
TL-1 Passenger fleet 31 mph
TL-2 Passenger fleet 44 mph
TL-3 Passenger fleet 62 mph
TL-4Single unit
delivery van truck56 mph
TL-5 Tractor Trailer 50 mph
TL-6 Tanker Trailer 50 mph
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NCHRP 350 MASH TransitionNCHRP 350 MASH TransitionNCHRP 350 MASH TransitionNCHRP 350 MASH Transition• January 1, 2018 – All new installations of longitudinal w-beam and cast-in-place concrete barrier
• June 30, 2018 – All new installations of w-beam terminals
• January 1, 2019 – All new installations of cable barrier, transitions, terminals and crash cushions
• January 1, 2020 – All newly fabricated precast concrete barriers, sign supports, bridge railing and work zone devices.
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ImpactsImpactsImpactsImpacts
▪New construction on NHS routes
▪Hardware damaged beyond repair on NHS Routes
▪Barrier Policy
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NHS System in Ohio
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FHWA Open LetterFHWA Open LetterFHWA Open LetterFHWA Open Letter
• New Products require the full suite of tests to obtain FHWA eligibility letter
• Any modification will require testing
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MASH MASH MASH MASH VS. VS. VS. VS. NCHRPNCHRPNCHRPNCHRP----350350350350
• Car size
• Impact angle
• Cable barrier
• Evaluation criteria
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MASH MASH MASH MASH VS.VS.VS.VS. NCHRPNCHRPNCHRPNCHRP----350350350350
• Evaluation Criteria• Windshield damage evaluation quantitative• Occupant compartment damage quantitative• All criteria is pass/fail, eliminating “marginal pass”
• Maximum roll and pitch angles are set at 75 degrees
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MASH MASH MASH MASH VS. VS. VS. VS. NCHRPNCHRPNCHRPNCHRP----350350350350
NCHRP-350 - Geo Metro (1,800 lb.) MASH - Kia Rio (2,400 lb.)
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MASH MASH MASH MASH vs. vs. vs. vs. NCHRPNCHRPNCHRPNCHRP----350350350350
NCHRP-350 –Chevy Silverado Single Cab (4,400 lb.)
MASH - Chevy Silverado (5,000 lb.)
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Concrete BarrierConcrete BarrierConcrete BarrierConcrete Barrier
• Crash test by Midwest Roadside Safety Facility
• Pickup Test to TL-3
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Midwest Guardrail System (MGS)Midwest Guardrail System (MGS)Midwest Guardrail System (MGS)Midwest Guardrail System (MGS)
• FHWA Eligibility Letter – B212 • Except:
• Reduced Post Spacing• Round Wooden Posts• 8:1 slopes
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MASH MASH MASH MASH VS. VS. VS. VS. NCHRPNCHRPNCHRPNCHRP----350 350 350 350 ----GuardrailGuardrailGuardrailGuardrail
• MGS vs. Type 5• Splice location• 8” blockout vs. 12” blockout
• 31” height
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• MGS Long Span MASH TL-3 test
▪ Long span 1 video
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• MGS Long Span MASH TL-3 test
▪ Long span 2 video
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WWWW----Beam TerminalsBeam TerminalsBeam TerminalsBeam Terminals
• NCHRP-350• SKT & ET-
Plus• MASH
• Soft Stop, MSKT, MAX-Tension
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SoftStopMASH Crash Test SoftStop
video
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Cable BarriersCable BarriersCable BarriersCable Barriers
• What is damaged beyond repair?• All current systems are NCHRP-350
compliant
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▪ Cable video 1 – from D8 traffic safety conference
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▪ Cable hit video from tuttle crossing
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Work ZonesWork ZonesWork ZonesWork Zones
–Useful life?
–NCHRP study to develop the next generation of PCB
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• Portable Concrete Barrier
▪ Strapped conc barrier video
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• Free standing Portable Concrete Barrier
▪ Unrestrained conc barrier video
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Approved Products ListApproved Products ListApproved Products ListApproved Products Listhttp://www.dot.state.oh.us/Divisions/Engineering/Roadway/DesignStandards/r
oadway/Pages/Approved%20Products.aspx
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MASH MASH MASH MASH VS. VS. VS. VS. NCHRPNCHRPNCHRPNCHRP----350 350 350 350 –––– AnchorsAnchorsAnchorsAnchors
http://www.dot.state.oh.us/Divisions/Engineering/Roadway/DesignStandards/r
oadway/Pages/GuardrailEndTreatments.aspx
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Questions?