RJ Dieken, Esq. — 14 years hauling superloads across all 48 states and Canada, now a licensed trial attorney. It's a combination not found in another expert witness. Available nationwide, for plaintiff and defense.
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Oversize and heavy haul litigation lives in the gap between those two worlds — permit conditions, route surveys, escort coordination, axle-weight distribution, securement engineering. An expert who only knows one side of that gap misses what the jury needs to hear.
Superloads to 260,000 lbs GVW as a solo driver. Driver and steerman on moves to 800,000 lbs. Crew member on moves to 1.8 million lbs. Route planning, pilot car supervision, and securement design — not theory. Miles.
Licensed Montana attorney (admitted 2023) with an active felony trial practice. Extensive courtroom and jury trial experience. Fluent in what survives cross-examination — because conducting cross-examination is the day job.
In nationwide case searches, we found no other expert who combines real-world superload driving experience with a law degree and active trial practice.
Expert evaluation of permits, route surveys, securement, escort operations, and driver conduct in oversize load incidents — with a candid read on the strengths and weaknesses of your theory of the case.
Clear, defensible expert reports that translate multi-axle physics and permit regulations into language a judge and jury can follow — written by someone who drafts legal documents for a living.
Expert testimony at deposition, plus a rare asset for the attorney taking one: help crafting the technical questions the opposing expert hopes you don't know to ask.
Courtroom-tested expert testimony from a working trial attorney. Comfortable in front of a jury, calm under cross, and able to teach the technical facts without losing the room.
Scope note: my expertise is oversize and heavy haul operations — permits, routes, escorts, securement, and driver standard of care. I do not offer crash reconstruction services, and I refer standard dry-van trucking matters elsewhere. Oversize is a different world, and it's the world I know.
Primarily civil litigation. For criminal matters arising from an oversize load incident, an expert who is also a criminal trial attorney is an exceptionally strong pick.
// All photos from the author's own loads and crews, 2012–2019.
"In 1,000 miles I'd bet I went faster than 55 mph for less than three hours total, and never took an intersection turn above 3 mph. Slow and careful is how a real oversize driver does his work. There is always something that doesn't go as planned — and it's your job to make it all turn out right." — RJ Dieken, on hauling a 64,000 lb substation tank from Ohio to Vermont on secondary roads
That standard of care — what a competent oversize operator actually does, mile by mile, permit by permit — is precisely what's at issue in most heavy haul litigation. I can tell a jury what it looks like because I lived it, and I can hold up under cross because cross-examination is what I do now.
Anyone a court qualifies based on relevant knowledge, training, or experience — but in oversize and heavy haul cases, the strongest experts are people who actually held a CDL and moved superloads under permit, not just consultants who studied the industry. Real driving experience is what supports opinions on standard of care, route decisions, and securement under cross-examination.
Reviews the permit, route survey, securement method, and escort operations involved in an incident; forms an opinion on whether industry standard of care was met; writes an expert report; and testifies at deposition or trial to explain the technical facts to a judge or jury.
Yes. Oversize and heavy haul operations run under a separate permit and regulatory system from standard trucking — different axle rules, escort requirements, and route restrictions. A general trucking expert who has never pulled a superload typically hasn't worked inside that system. This practice is limited to oversize and heavy haul matters specifically, and does not include crash reconstruction.
Both. Retained by either side depending on the case, with travel expenses covered for matters outside Montana.
Send a brief, non-confidential summary of the matter — case type, jurisdiction, and timeline. You'll receive a prompt response regarding availability and a conflicts check.