Positive Protection Devices
Contains and redirects vehicles in accordance with National Cooperative Highway Research Program NCHRP Report 350 preventing their intrusion into the work space.
NCHRP Report 350 testing requirements
FHWA requires that all TCD must meet crashworthy performance c...
ATSSA TCS Module 5 Positive
Protection Devices questions with
verified solutions 2024-2025
Positive Protection Devices - answer Contains and redirects vehicles in
accordance with National Cooperative Highway Research Program NCHRP
Report 350 preventing their intrusion into the work space.
NCHRP Report 350 testing requirements - answer FHWA requires that all
TCD must meet crashworthy performance criteria contained in NCHRP
Report 350 now being replaced by MASH
MASH = Manual Assessing Safety Hardware is replacing - answer FHWA
Report 350. MASH is not mentioned in MUTCD
How do you know they are Crashworthy devices? - answer Met test
evaluation of Report 350/MASH and/or Received an "Eligibility letter" from
FHWA
MASH category 4 Devices: - answer Trailer mounted devices heavier than
100 pounds: 1Area lighting units 2Arrow boards 3Temporary signals
4Radar speed display trailers. Should be moved outside clear zone or be
shielded by a barrier or crash cushion WHEN NOT IN USE. Should be
delineated WHEN IN USE.
Temporary Traffic Barriers are - answer Portable devices to prevent
penetration by vehicles while minimizing injuries to vehicle occupants.
Provide positive protection to: 1workers,2bicyclists,
3pedestrians,4Hazards/drop-offs
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