Implementation of AASHTOs Manual for Assessing Safety Hardware (MASH) 2016 Update from the Technical Committee on Roadside Safety Chris Poole, Iowa DOT April 4, 2011 ITE Technical Conference Lake Buena Vista, Fl MASH 2016
Overview Background and Context MASH Implementation Agreement Availability of MASH Hardware Anticipated Costs Implementation Activities/Next Steps April 4, 2011 ITE Technical Conference Lake Buena Vista, Fl
Overview Technical Committee on Roadside Safety Role in AASHTO Responsibilities RDG & MASH publication MASH vs. Roadside Design Guide (RDG) MASH: assessment of roadside hardware RDG: use of roadside hardware Roadside hardware: Barriers, crash cushions, work-zone devices, bridge rails, signing/lighting supports, etc. April 4, 2011
ITE Technical Conference Lake Buena Vista, Fl Background and Context NCHRP Report 350 (1993) to MASH 2009 MASH 2009 to MASH 2016 MASH 2009 Implementation Agreement April 4, 2011 ITE Technical Conference Lake Buena Vista, Fl NCHRP 350 to MASH 2009 (Revolution)
Knowledge gained from use of devices and test methods Advances in the science of crash testing Additional tests and evaluation criteria Changes in nationwide vehicle fleet April 4, 2011 ITE Technical Conference Lake Buena Vista, Fl MASH 2009 to MASH 2016 (Evolution)
Major change: Crash testing criteria for cable barriers on slopes Minor changes: Soil strength testing Improved documentation of vehicle damage Longer tractor-trailer lengths April 4, 2011 ITE Technical Conference Lake Buena Vista, Fl MASH 2009 Implementation Agreement Did not sunset use of NCHRP 350 hardware
Anticipated manufacturers would take the initiative to develop MASH-compliant devices (but this didnt happen) April 4, 2011 ITE Technical Conference Lake Buena Vista, Fl MASH 2016 Implementation Agreement Additional safety benefits of MASH could only be realized if new hardware was developed Incentive: sunset NCHRP 350 criteria for
new devices Joint FHWA/AASHTO/TCRS group formed, final agreement issued on 1/7/2016 Staggered implementation approach April 4, 2011 ITE Technical Conference Lake Buena Vista, Fl Overview - Agreement Details The AASHTO Technical Committee on Roadside Safety will continue to be responsible for developing and maintaining the evaluation criteria as adopted by AASHTO. FHWA will continue its role in
issuing letters of eligibility of highway safety hardware for federal-aid reimbursement. April 4, 2011 ITE Technical Conference Lake Buena Vista, Fl Overview - Agreement Details Agencies are urged to establish a process to replace existing highway safety hardware that has not been successfully tested to NCHRP Report 350 or later criteria. April 4, 2011
ITE Technical Conference Lake Buena Vista, Fl Overview - Agreement Details Agencies are encouraged to upgrade existing highway safety hardware to comply with the 2016 edition of MASH either when it becomes damaged beyond repair, or when an individual agencys policies require an upgrade to the safety hardware. April 4, 2011 ITE Technical Conference
Lake Buena Vista, Fl Overview - Agreement Details For contracts on the National Highway System with a letting date after the sunset dates, only safety hardware evaluated using the 2016 edition of MASH criteria will be allowed for new permanent installations and full replacements. April 4, 2011 ITE Technical Conference Lake Buena Vista, Fl
Overview - Sunset Dates December 31, 2017: w-beam barriers and cast-in-place concrete barriers June 30, 2018: w-beam terminals December 31, 2018: cable barriers, cable barrier terminals, and crash cushions December 31, 2019: bridge rails, transitions, all other longitudinal barriers (including portable barriers installed permanently), all other terminals, sign supports, and all other breakaway hardware April 4, 2011 ITE Technical Conference Lake Buena Vista, Fl
Overview - Agreement Details Temporary work zone devices, including portable barriers, manufactured after December 31, 2019, must have been successfully tested to the 2016 edition of MASH. Such devices manufactured on or before this date, and successfully tested to NCHRP Report 350 or the 2009 edition of MASH, may continue to be used throughout their normal service lives. April 4, 2011 ITE Technical Conference Lake Buena Vista, Fl
Overview - Agreement Details Regarding the federal-aid eligibility of highway safety hardware, after December 31, 2016: FHWA will no longer issue eligibility letters for highway safety hardware that has not been successfully crash tested to the 2016 edition of MASH. continued April 4, 2011 ITE Technical Conference Lake Buena Vista, Fl
Overview - Agreement Details Modifications of eligible highway safety hardware must utilize criteria in the 2016 edition of MASH for re-evaluation and/or retesting. Non-significant modifications of eligible hardware that have a positive or inconsequential effect on safety performance may continue to be evaluated using finite element analysis. April 4, 2011 ITE Technical Conference Lake Buena Vista, Fl
MASH 2016 Ballot Results/Dates TCRS final draft approved & sent to SCOD for ballot SCOD Ballot sent out on April 27th, 2016 SCOH pending SCOD ballot MASH 2016 publish date? April 4, 2011 ITE Technical Conference Lake Buena Vista, Fl Availability of MASH Hardware Task Force 13 Barrier Hardware Guide http://www.aashtotf13.org/Barrier-Hardware.php
FHWA website of crash-tested hardware http://safety.fhwa.dot.gov/roadway_dept/policy_ guide/road_hardware/ MASH-compliant NCHRP 350 devices April 4, 2011 ITE Technical Conference Lake Buena Vista, Fl Availability of MASH Hardware Longitudinal w-beam barrier and cast-in-place concrete barrier (12/31/17):
Able to be ready for sunset dates as long as each state does not need to test own configuration Many w-beam systems have been tested Some cast-in-place concrete systems may need additional tests W-beam terminals (6/30/2018) April 4, 2011 ITE Technical Conference Lake Buena Vista, Fl Availability of MASH Hardware Cable barriers, cable barrier terminals, crash cushions (12/31/2018)
Expect cable barrier to be ready Cable terminals will be more challenging but are also expected to be ready Some transitions require testing Crash cushions should be ready; thrie-beam bullnose testing needs to be funded soon April 4, 2011 ITE Technical Conference Lake Buena Vista, Fl Availability of MASH Hardware Bridge rails, transitions, all other longitudinal barriers and terminals; all breakaway hardware (12/31/2019)
Many types of bridge rails in use among the states; testing needs not yet fully known NCHRP 20-7 project to evaluate grandfathering of historical bridge rail designs NCHRP project to examine sign supports and breakaway hardware April 4, 2011 ITE Technical Conference Lake Buena Vista, Fl Availability of MASH Hardware Guardrail: 29-inch W-beam system (TL-3) 31-inch Midwest Guardrail System (TL-3)
Concrete Barrier: 32-inch cast-in-place barrier (TL-3) 36-inch cast-in-place barrier (TL-4) F-Shape portable concrete barrier with 3-loop connection (TL-3) April 4, 2011 (NCHRP 22-14(02)) ITE Technical Conference Lake Buena Vista, Fl Anticipated Costs Testing of non-proprietary devices NCHRP, pooled-fund programs, individual states
(unique designs they may use) MASH-compliant longitudinal barrier systems Multiple systems currently available (various types) No noted increase in cost vs. previous systems MASH-compliant terminals Few systems currently available Initial increase in cost ($200-$700) April 4, 2011 ITE Technical Conference Lake Buena Vista, Fl Implementation Activities/
Next Steps MASH hardware catalog Sharing state QPLs Sharing draft state policies Encourage pooled fund participation! Midwest Pooled Fund (Univ. of Nebraska) Roadside Pooled Fund (Texas A&M) April 4, 2011
ITE Technical Conference Lake Buena Vista, Fl Questions / Discussion April 4, 2011 ITE Technical Conference Lake Buena Vista, Fl
