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Accession Number PB2013-111699
Title Analysis of Existing Work-Zone Devices with MASH Safety Performance Criteria.
Publication Date Feb 2009
Media Count 391p
Personal Author D. L. Sicking J. D. Schmidt J. L. Holloway K. A. Lechtenberg R. K. Faller
Abstract Crashworthy, work-zone, portable sign support systems accepted under NCHRP Report No. 350 were analyzed to predict their safety peformance according to the TL-3 MASH evaluation criteria. An analysis was conducted to determine which hardware parameters of sign support systems would likely contribute to the safety performance with MASH. The acuracy of the method was evaluated through full-scale crash testing. Four full-scale crash tests were conducted with a pickup truck. Two tall-mounted, sign support systems with aluminum sign panels failed the MASH criteria due to windshield penetration. One low-mounted system with a vinyl, roll-up sign panel failed the MASH criteria due to windshield and floorboard penetration. Another low-mounted system with an aluminum sign panel successfully met the MASH criteria. Four full-scale crash tests were conducted with a small passenger car. The low-mounted tripod system with an aluminum sign panel failed the MASH criteria due to windshield penetration. One low-mounted system with aluminum sign panel failed the MASH criteria due to excessive windshield deformation, and another similar system passed the MASH criteria. The low-mounted system with a vinyl, roll-up sign panel successfully met the MASH criteria. Hardware parameters of work-zone sign support systems that were determined to be important for failure with MASH include sign panel material, the height to the top of the mast, the presence of flags, sign-locking mechanism, base layout and system orientation. Flowcharts were provided to assist manufacturers when designing new sign support systems.
Keywords Assessments
Breakaway structures
Compliance test
Guardrails
Highway safety
Median barriers
Motor vehicle safety
Roadside hazards
Roadside safety hardware
Safety criteria
Safety performance
Sign supports
Temporary sign stand
Traffic safety
Work-zone device

 
Source Agency Federal Highway Administration
NTIS Subject Category 85D - Transportation Safety
85H - Road Transportation
91B - Transportation & Traffic Planning
43G - Transportation
Corporate Author Nebraska Univ.-Lincoln. Midwest Roadside Safety Facility.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1326
Contract Number N/A

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