Crashworthy Devices Information
Contact MnDOT for crashworthy device information
Crash Testing Requirement for Work Zone Safety Devices
Includes small and lightweight channelizing and delineating devices. These devices include cones, tubular markers, flexible delineater posts and plastic drums.
- Manufacturers can self-certify as MASH-16 compliant.
Includes devices that are not expected to produce significant vehicular velocity change but may otherwise be hazardous. Examples include sign supports, barricade supports, small portable (balloon) lighting, and Category 1 devices with attachments or sign panels.
- Devices manufactured after December 31, 2019 must be MASH-16 Compliant.
- NCHRP-350 devices purchased before December 31, 2019 may be used until December 31, 2024. This includes ground mounted sign supports.
- Knee brace may no longer be installed after June 30, 2020.
Includes hardware that is expected to cause significant velocity change or other potentially harmful reactions to impacting vehicles. Examples include temporary barrier, crash cushions and truck/trailer mounted attenuators.
Except for temporary barrier
- Devices manufactured after December 31, 2019 must be MASH-16 compliant.
- NCHRP-350 devices purchased before December 31, 2019 may be used until December 31, 2029.
- Portable concrete barrier that meets MnDOT specifications is considered acceptable.
- All other temporary barrier used after December 31, 2019 must be MASH-16 compliant.
- MnDOT owned temporary barrier may be used for its useful life, MnDOT will only purchase MASH-16 compliant barrier after December 31, 2019
Trailer mounted devices such as portable changeable message signs, arrow boards, automated flagging assistance devices, portable signals, and cameras.
- Historically not considered crashworthy. MnDOT will perpetuate Category 4 requirements:
- Should be shielded when possible
- Should be removed when not needed
- Shall be delineated when deployed and not shielded
MnDOT Tech Memo (19-03-T-01) Crashworthy Requirements of TTC Devices - Effective August 1, 2019
Crashworthy Device Certificate of Compliance Form (PDF 89.7 KB)
FHWA website for Approved Work Zone Devices
MnDOT approved generic sign designs
Temporary Portable Concrete Barrier
The contractor shall furnish and install portable precast median barriers in accordance with current specification. MnDOT Standard Plate 8337
Special Provision and Quality Specifications
Provides description of MnDOT Standard Plate 8337 and shows examples of: Barriers - Acceptable and Unacceptable (PDF 2.5 MB)