What Is A Accredited Traffic Accident Reconstructionist?

What the Credential Actually Is

An Accredited Traffic Accident Reconstructionist is a professional who has passed the formal accreditation examination administered by the Accreditation Commission for Traffic Accident Reconstruction (ACTAR). The credential signals that the holder can apply physics, geometry, and evidence-based methodology to determine how a vehicle collision occurred - vehicle speeds, points of impact, sequence of events, and contributing factors - in a way that meets a documented, testable standard.

This is not a training certificate handed out for attending a class. It is an accreditation earned by demonstrating competency on a proctored written examination, backed by verified education, training, and field experience. If you're researching this credential for the first time, our companion piece on what Accredited Traffic Accident Reconstructionist actually means covers the terminology in more depth, and the meaning breakdown is a useful companion read if you're comparing it against similarly named credentials in the reconstruction field.

ACTAR: The Certifying Body

ACTAR - the Accreditation Commission for Traffic Accident Reconstruction - is the sole body that issues this credential. ACTAR does not run training courses itself; instead, it evaluates candidates who have already accumulated relevant education and field experience, then tests that knowledge through its examination. This separation between training providers and the accrediting body is important: your coursework prepares you, but ACTAR alone certifies you.

For a full walkthrough of how ACTAR structures its content, see our exam domains guide, which breaks down exactly what each scored part of the exam covers.

Exam Structure: Two Parts, Eight Hours

The ACTAR examination is an in-person, proctored, two-part written test. Under the preparation guide effective June 1, 2026, the exam totals 100 questions: 75 theory questions and 25 practical questions, plus a scaled diagram component. Rather than being organized into percentage-weighted subject domains, the exam is divided into two separately scored parts:

Between the two four-hour parts, candidates get a separate one-hour lunch break, for eight total testing hours plus the break. Because the two parts are scored independently, a strong performance on the theory section cannot offset a weak practical score - each part must individually clear the passing threshold. Our passing score breakdown goes deeper into exactly how that threshold is applied.

Who Can Apply

ACTAR does not open its exam to anyone who simply pays a fee. Eligibility is approval-based: candidates must document their training, education, and hands-on experience in crash reconstruction, and must supply at least three references who can attest to that background. This vetting step exists before you're even permitted to schedule the written exam.

Our detailed requirements article walks through how to assemble a competitive application, including what kind of documentation reviewers typically expect.

Fees, Deadlines, and Attempt Limits

ACTAR's fee structure has two components: a nonrefundable application fee and a separate examination fee.

For a complete cost picture including renewal pricing, review our certification cost breakdown.

Timing matters just as much as money. The application must be submitted at least 60 days before the intended exam date, and registration itself must be completed at least 30 days before sitting for the exam. Miss either window and you push your entire testing timeline back. See our exam dates and scheduling guide for how to map out these deadlines against a target test date.

Once approved, initial eligibility lasts two years, during which a candidate gets up to three attempts to pass both parts. If that window closes without success, the guide permits one additional two-year period upon request and payment - again with up to three attempts, and both parts must be completed regardless of any partial success earned earlier. In other words, passing Part 1 in an earlier attempt does not carry forward automatically; both parts are required within the eligibility period being used.

What You Can (and Can't) Bring

Because the practical section involves manual reconstruction diagramming and calculation, the allowed materials list is specific:

• Permitted: printed bound references, laminated or sleeved resource pages secured in binders, approved calculators, and manual drawing tools.
• Prohibited: computers, phones, smartwatches, and any electronic reference files.

Approved calculator models are listed specifically in the June 2026 preparation guide, so confirm your device against that list well before exam day rather than assuming a familiar calculator qualifies.

Who Hires Accredited Traffic Accident Reconstructionists

This credential is most commonly pursued by professionals already working in or adjacent to crash investigation: law enforcement traffic units, private forensic engineering firms, insurance special investigation units, and independent consultants who testify or produce reports for litigation. Because the accreditation requires documented experience just to sit for the exam, it functions less as an entry-level credential and more as formal recognition layered on top of existing reconstruction work.

If you're weighing whether pursuing this accreditation fits your career path, our jobs overview and salary guide discuss the kinds of roles and employers where the credential is typically valued, and our ROI analysis weighs the investment against the career upside qualitatively.

Keeping the Credential Current

Accreditation is not permanent. It renews on a five-year cycle, and renewal requires either:

• Earning 80 ACTAR continuing education units (CEUs) and paying a $325 renewal fee, or
• Successfully retaking the complete exam for $325 as an alternative path.

This means maintaining the credential requires ongoing professional development, not a one-time pass. Reconstructionists who stay active in the field typically find the CEU route more practical than repeating the full written exam.

Building a Study Plan Around Two Scored Parts

Because Part 1 (Theory) and Part 2 (Practical) are graded independently, an effective plan allocates distinct blocks of preparation time to each rather than treating "studying for ACTAR" as one activity.

Applying general study techniques like spaced repetition to your theory question review can help retain formulas and terminology over the weeks leading up to test day, but the real differentiator for this exam is timed practice under the exact material restrictions ACTAR enforces. For a more detailed week-by-week structure, see our full study guide for 2026, and if you want an honest gauge of how demanding the exam is before you commit to a timeline, our difficulty guide and pass rate analysis are worth reading first. You can also start testing your baseline knowledge right now using the practice questions on our main practice test platform.

Frequently Asked Questions