State-by-State TMA Regulations
MASH is federal, but test levels, ballast certification, arrow board rules, and approved-products lists come from each state DOT. A comparative starting point for fleet planning.
MASH sets the federal floor. Everything on top of it — which specific attenuators are approved, ballast certification, arrow board size, deployment rules — lands with each state DOT. Run trucks across state lines and you have to build for the strictest rule you will meet, not the average one.
What tends to vary by state
- Approved or qualified products lists, meaning which specific attenuators the state accepts.
- The MASH test level required at a given posted work-zone speed.
- Ballast and weight certification, such as New Jersey's ballast certification.
- Arrow board size and configuration.
- Deployment, offset, and buffer-distance rules.
Running trucks in more than one state? Spec TL-3 with ballast certification and a 25-lamp arrow board. That combination clears the widest set of state requirements straight off the build.
How to confirm your state's rules
Pull your state DOT's approved-products or qualified-products list for truck- and trailer-mounted attenuators. Then confirm the work-zone speed thresholds and any ballast or signage requirements. We source and upfit to the exact state specs our customers run under and will help you read them.
- My trucks cross state lines. How do I stay compliant everywhere?
- Build to the strictest state you operate in. In practice that usually means MASH TL-3, ballast certification, and a 25-lamp arrow board, which covers most states.
- Where do I find my state's approved list?
- Search your state DOT for 'truck/trailer mounted attenuators approved products.' We can also point you to the right list and confirm whether a given build qualifies.
Questions about your fleet?
The Heartland team will spec, source, and service the right compliant setup.
