Zone of Intrusion Envelopes Under MASH Impact Conditions for Rigid Barrier Attachments
Roadside barriers are often used to shield fixed objects that may be hazardous to
errant vehicles within the roadside clear zone. Barriers are also used to prevent vehicles
from engaging hazards located behind the barriers, such as steep drop-offs or slopes, and to
prevent cross-median crashes.
The TRB National Cooperative Highway Research Program's
NCHRP Research Report 1018: Zone of Intrusion Envelopes Under MASH
Impact Conditions for Rigid Barrier Attachments
seeks to develop zone of intrusion (ZOI) envelopes for a variety of rigid barriers
under MASH (AASHTO’s
Manual for Assessing Safety Hardware) safety criteria and develop implementation
guidance for highway design practitioners.
Supplemental to the report are
Appendices A-F and a
Presentation.
This Summary Last Modified On: 11/2/2022