MASH Information

Frequently Asked Questions

If you have any questions about the resources on this page, please contact a Montana Highway Barrier Mentor.

National Implementation

AASHTO Committee on Design

AASHTO/FHWA Joint Implementation Agreement for MASH
Modification to Joint Implementation Agreement

FHWA Office of Safety

Guardrail Resources
Hardware Eligibility Letters
Roadside Hardware Policy Memoranda and Guidance

Helpful Links

Pooled Fund Programs

Roadside Safety Pooled Fund Program
Midwest Roadside Safety Facility

MDT Guardrail Systems

Approved Proprietary Systems

Qualified Products List (QPL)

“W” Beam Guardrail System

Interim Guidance
Design Memo – MASH Guardrail Implementation Guide
Detailed Drawings – Section 606

Crash Cushions

Interim Guidance

Cable Guardrail System

Interim Guidance
Detailed Drawings – Section 606

Box Beam Guardrail System

Interim Guidance
Detailed Drawings – Section 606

Concrete Barrier Rail

Interim Guidance
Detailed Drawings – Section 605

Bridge Barrier Rail

Bridge Rail Guidance

Design References and Training

Design References

MDT Road Design Manual – Ch. 9 Roadside Safety
Guidelines for Nomination and Development of Pavement Projects


MASH Guardrail Implementation (2018 Preconstruction Conference Presentation) PowerPoint | PDF

FAST Act – Highway Barrier Design Training (2018)

Designer Introduction – Participant Notebook
Designer Session 1 – Introduction and Pre-assessment
Designer Session 2 – Clear Zone and Guidelines for Barrier Need
Designer Session 3 – Barrier Systems
Designer Session 4 – Performance Characteristics of Terminals
Designer Session 5 – Design Principles
Designer Session 6 – Length of Need and Special Considerations
Designer Session 7 – Design Workshop
Designer Workshop Solutions

FAST Act – Highway Barrier Inspector Training (2018)

Inspector Introduction – Participant Notebook
Inspector Session 1 – Roadside Safety Problem
Inspector Session 2 – Barrier Systems
Inspector Session 3 – Performance Characteristics of Terminals
Inspector Session 4 – Guardrail Design
Inspector Session 5 – Installation/Common Errors of System
Inspector Session 6 – Maintenance of Systems