- Submit your ACTAR application at least 60 days before your target exam date.
- Register at least 30 days before the exam after your application is approved.
- The exam is one in-person sitting: 75 theory questions plus 25 practical questions, 100 total, four hours per part.
- Initial eligibility lasts two years with up to three attempts; one additional two-year extension is available.
2026 Exam Cycle Overview
Unlike certifications that offer rolling online testing windows, the Accredited Traffic Accident Reconstructionist credential from the Accreditation Commission for Traffic Accident Reconstruction (ACTAR) is delivered as an in-person, proctored, two-part written examination. There isn't a bank of monthly digital test dates you can book on demand the way you might with a computer-based certification exam. Instead, ACTAR schedules sittings tied to specific administration dates, and candidates plan backward from those dates using the application and registration deadlines described below.
The preparation guide effective June 1, 2026 governs the content and format for exams administered from that date forward: 75 theory questions and 25 practical questions, for 100 questions total, plus a scaled diagram component within the practical portion. If you're building a study calendar for 2026, this guide - not older versions - is the one to align your prep with. For a full breakdown of what's actually tested inside each part, see the Accredited Traffic Accident Reconstructionist Exam Domains Guide.
Application and Registration Deadlines
ACTAR's process has two distinct steps, and missing the order or the timing can push you to the next available sitting:
- Application submission: at least 60 days before the exam date you're targeting. This is when ACTAR reviews your documented training, education, and experience, along with a minimum of three references, to determine eligibility.
- Registration: at least 30 days before the exam date, and only after your application has been approved. Registration is a separate action from applying - approval does not automatically enroll you in a sitting.
Because approval isn't instantaneous, candidates who wait until the 60-day mark to submit their application are cutting it close. If your references are slow to respond or your documentation needs revision, you could miss the registration window for your intended date entirely. Start the paperwork earlier than the minimum whenever possible. The detailed criteria for what counts as acceptable training and experience documentation are covered in the Accredited Traffic Accident Reconstructionist Requirements guide.
Key Takeaway
Build a 90-day runway before any target exam date: roughly 30 days of buffer for application review, then the mandatory 60-day application window, with registration confirmed by day 30 out.
Test Day Structure: Two Parts, Eight Hours
Once you're registered, the test day itself has a fixed rhythm. Each of the two examination parts is allotted four hours, for eight total testing hours, with a separate one-hour lunch break between them. This isn't a domain-weighted single exam - the two parts are separately scored sections, each representing a distinct skill set:
Domain 1: Theory Examination (Part 1)
Four hours, 75 questions covering multiple-choice, true/false, and calculation-based items. This part tests conceptual understanding of crash mechanics, physics, and reconstruction methodology.
- Numerical answers must include correct units and match ACTAR's specified reporting precision
- Answer ranges are marked incorrect - you need the exact expected value and unit
- No partial credit is awarded on any question type
Domain 2: Practical Examination (Part 2)
Four hours, 25 questions built around a controlled-crash case plus a manual reconstruction diagram scaled to the scenario provided.
- Requires manual drawing and measurement skills, not just formula recall
- Tests your ability to translate scene evidence into a scaled diagram and supporting calculations
- Scored separately from Theory - strong Theory performance cannot offset a weak Practical score
Both parts require a minimum score of 75% to pass, and both scores stand independently. A deep dive into scoring mechanics, including how the 75% threshold is applied per part, is available in the Accredited Traffic Accident Reconstructionist Passing Score breakdown.
| Element | Theory (Part 1) | Practical (Part 2) |
|---|---|---|
| Question count | 75 | 25 plus scaled diagram |
| Time allotted | 4 hours | 4 hours |
| Format | Multiple-choice, true/false, calculation | Controlled-crash case, manual diagram |
| Passing threshold | 75% | 75% |
| Partial credit | None | None |
Fees Tied to Dates and Membership Status
Every exam date carries two nonrefundable payments that you'll want to budget before you commit to a sitting:
- Application fee: $175 for members of ACTAR participating organizations, $200 for other candidates.
- Examination fee: $75 for members of ACTAR participating organizations, $125 for other candidates.
Because both fees are nonrefundable, picking a realistic exam date matters - rescheduling or missing a sitting isn't a matter of shifting a calendar entry, it can mean paying again. Confirm your organizational membership status before applying, since it directly changes what you owe at both the application and registration stages. For the complete cost picture, including renewal fees down the road, see the Accredited Traffic Accident Reconstructionist Certification Cost breakdown.
Eligibility Window and Retake Timing
Your exam date planning doesn't stop after you pass or fail once - it operates inside a defined eligibility period:
- Initial eligibility lasts two years from approval, during which you get up to three attempts.
- If you exhaust your attempts or your two-year window closes without passing, the guide permits one additional two-year period on request and payment, again with up to three attempts.
- Both parts are required regardless of earlier partial success - passing Theory in one sitting doesn't carry forward if you fail Practical and need to retest; you must complete both parts again within the eligibility structure.
This "both parts required" rule is one of the most misunderstood aspects of ACTAR's scheduling. Candidates sometimes assume a passed section is banked permanently, but the guide treats retakes as full re-attempts of the complete exam. Plan your study schedule accordingly rather than assuming you can isolate weak spots on a future date.
Scheduling Your Prep Around the Two Parts
Because Theory and Practical are scored independently and both demand different skills - one is knowledge recall and calculation, the other is applied diagramming under a case scenario - your study calendar should mirror that split rather than treating the exam as one undifferentiated body of material.
Theory Foundations
- Work through calculation-heavy topics: speed analysis, momentum, and unit conversions matching ACTAR's required precision
- Drill multiple-choice and true/false question styles so answer-range traps don't cost you points
Practical Diagramming
- Practice manual scaled diagrams from mock controlled-crash case data
- Rehearse with the approved calculators and manual drawing tools you'll actually use on test day
Timed Full Simulations
- Run four-hour timed blocks for each part separately to build stamina for the eight-hour test day
- Review any answer that fell inside a "range" instead of an exact value - those are the mistakes that erase points fastest
If you want a structured walkthrough of this kind of preparation sequencing in more depth, the Accredited Traffic Accident Reconstructionist Study Guide lays out a fuller plan for first-attempt success. And if you're still gauging how demanding this exam actually is relative to your background, the difficulty guide walks through what makes the two-part format challenging.
What You Can and Cannot Bring
Test-day logistics matter as much as the calendar dates, since bringing the wrong materials can create problems you can't fix once you're seated:
- Permitted: printed bound references, laminated or sleeved resource pages secured in binders, approved calculators from the list specified in the June 2026 preparation guide, and manual drawing tools for the diagram portion.
- Prohibited: computers, phones, smartwatches, and any electronic reference files.
Check the calculator list in the current preparation guide well before your exam date - showing up with an unapproved model on test day isn't something a proctor can waive on the spot. Build your reference binder early enough that you've tested it under timed conditions, not the night before.
Key Takeaway
Confirm your calculator model against the June 2026 preparation guide's approved list weeks before your exam date, not the morning of.
Renewal Dates Come Next
Passing on your scheduled date isn't the last calendar item to track. ACTAR accreditation renews every five years, requiring 80 ACTAR CEUs and a $325 renewal fee, or alternatively retaking the complete exam for $325 if you prefer that route over continuing education. Mark your five-year renewal window as soon as you pass so it doesn't sneak up on you the way an exam date might. For candidates weighing whether the whole process is worth the time investment across those renewal cycles, the ROI analysis and salary guide offer useful context on where this credential fits into a reconstruction career.
Before you lock in an exam date, it's worth reviewing what other candidates report about how the two parts feel under real time pressure. Our pass rate discussion and the general one-page review sheet are both useful companions once you have a date on the calendar. You can also start running practice questions now so your prep timeline lines up cleanly with your 60-day application submission and 30-day registration deadlines.
Frequently Asked Questions
Submit your application at least 60 days before your target exam date, since ACTAR must review your training, education, experience, and at least three references before approving eligibility.
No. Application is the eligibility review step, due at least 60 days out. Registration for the specific exam date happens separately, at least 30 days before the exam, and only after approval.
Eight total testing hours across two parts - four hours for the 75-question Theory part and four hours for the 25-question Practical part - plus a separate one-hour lunch break.
Initial eligibility lasts two years with up to three attempts. The guide permits one additional two-year period on request and payment, again with up to three attempts, but both parts must be completed regardless of earlier partial success.
No. Computers, phones, smartwatches, and electronic reference files are prohibited. Only printed bound references, laminated or sleeved pages in binders, approved calculators, and manual drawing tools are permitted.
- Accredited Traffic Accident Reconstructionist Study Guide 2026: How to Pass on Your First Attempt
- Accredited Traffic Accident Reconstructionist Pass Rate 2026: What the Data Shows
- Accredited Traffic Accident Reconstructionist Passing Score 2026: Exactly What You Need to Pass
- How Hard Is the Accredited Traffic Accident Reconstructionist Exam? Complete Difficulty Guide 2026