MASH MASH MASH MASH ImpactImpactImpactImpact

OTEC 2017

What What What What isisisis MASH?MASH?MASH?MASH?

Manual for Assessing Safety Hardware

WhWhWhWhat fixed objects do people hit?at fixed objects do people hit?at fixed objects do people hit?at fixed objects do people hit?

WhatWhatWhatWhat isisisisMASH?MASH?MASH?MASH?

• 2009 MASH released

• 2017 FHWA and AASHTO agreed on NCHRP-350 sunset date.

MASH Test MatrixMASH Test MatrixMASH Test MatrixMASH Test Matrix

MASH Test MatrixMASH Test MatrixMASH Test MatrixMASH Test Matrix

MASH Test MatrixMASH Test MatrixMASH Test MatrixMASH Test Matrix

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

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.

ImpactsImpactsImpactsImpacts

▪New construction on NHS routes

▪Hardware damaged beyond repair on NHS Routes

▪Barrier Policy

NHS System in Ohio

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

MASH MASH MASH MASH VS. VS. VS. VS. NCHRPNCHRPNCHRPNCHRP----350350350350

• Car size

• Impact angle

• Cable barrier

• Evaluation criteria

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

MASH MASH MASH MASH VS. VS. VS. VS. NCHRPNCHRPNCHRPNCHRP----350350350350

NCHRP-350 - Geo Metro (1,800 lb.) MASH - Kia Rio (2,400 lb.)

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.)

Concrete BarrierConcrete BarrierConcrete BarrierConcrete Barrier

• Crash test by Midwest Roadside Safety Facility

• Pickup Test to TL-3

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

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

• MGS Long Span MASH TL-3 test

▪ Long span 1 video

• MGS Long Span MASH TL-3 test

▪ Long span 2 video

WWWW----Beam TerminalsBeam TerminalsBeam TerminalsBeam Terminals

• NCHRP-350• SKT & ET-

Plus• MASH

• Soft Stop, MSKT, MAX-Tension

SoftStopMASH Crash Test SoftStop

video

Cable BarriersCable BarriersCable BarriersCable Barriers

• What is damaged beyond repair?• All current systems are NCHRP-350

compliant

▪ Cable video 1 – from D8 traffic safety conference

▪ Cable hit video from tuttle crossing

Work ZonesWork ZonesWork ZonesWork Zones

–Useful life?

–NCHRP study to develop the next generation of PCB

• Portable Concrete Barrier

▪ Strapped conc barrier video

• Free standing Portable Concrete Barrier

▪ Unrestrained conc barrier video

Approved Products ListApproved Products ListApproved Products ListApproved Products Listhttp://www.dot.state.oh.us/Divisions/Engineering/Roadway/DesignStandards/r

oadway/Pages/Approved%20Products.aspx

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

Questions?