Implementation of the Manual for Assessing Safety Hardware (MASH)

California Department of Transportation's (Caltrans) timeline for implementation of roadside safety hardware and evaluation of new products under MASH is consistent with the Association of State Highway and Transportation Officials (AASHTO) and Federal Highway Administration (FHWA) Joint Implementation Agreement for MASH.

Accessibility Assistance: Caltrans makes every attempt to ensure our documents are accessible. Due to variances between assistive technologies, there may be portions of the following documents which are not accessible. Where documents cannot be made accessible, we are committed to providing alternative access to the content. Should you need additional assistance, please contact us at (916) 654-2852 (and/or a division contact) or visit https://dot.ca.gov/request-ada-compliant-documents.

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Caltrans Policy Documents on MASH Implementation

List of MASH Devices

Other Resources

• Traffic Safety Systems Guidance
• Status of AASHTO MASH Implementation
• Authorized Materials Lists (AML)