ISA TRAQ study guide
ISA TRAQ · Work through your exam, one topic at a time.
The ISA Tree Risk Assessment Qualification (TRAQ) is a credential offered by the International Society of Arboriculture, the body whose credential pages describe ISA credentials as helping "consumers identify qualified, knowledgeable tree care professionals." TRAQ sits among the ISA credential types aimed at people who want to advance a career in arboriculture, and it is built around a single practical skill: judging the likelihood and consequences of tree failure and communicating that judgment to whoever owns or manages the tree. Candidates typically include consulting arborists, municipal and utility vegetation managers, insurance and legal reviewers, and crew leaders who sign off on hazard work. The qualification is delivered as a training course followed by an assessment, and ISA lists scheduled offerings such as a TRAQ 3.0 session on 11–13 November 2026 at Oakland Community College in Auburn Hills, Michigan. Preparation means working through the ISA Tree Risk Assessment Manual and its field forms, practicing the risk rating matrices on real trees, and rehearsing written report language. Because ISA does not enumerate TRAQ domains, weighting, item counts, time limits, fees, or pass marks on its public credential pages, this page leaves those blank rather than guess; confirm current details with ISA directly before you register or budget. Topics on this exam: Tree Risk Assessment (domain structure not enumerated in source). The ISA TRAQ study guide has 1 section and about 399 words.
01Tree Risk Assessment
The Tree Risk Assessment domain tests whether you can inspect a tree, identify and rate defects, decide whether a target is present, and convert those findings into a defensible risk rating and mitigation recommendation. TRAQ separates the likelihood that a tree or part fails from the likelihood that it strikes something - candidates lose marks when they collapse the two. Risk = likelihood of failure × likelihood of impact × consequences. A tree with an imminent defect but no target is not a high-risk tree in TRAQ terms; conversely a sound tree over a busy playground can warrant a moderate rating.
399 words, about 2 minMore study resources for ISA TRAQ
- Practice questionsIn the ISA Tree Risk Assessment Qualification framework, a risk rating combines which two components?
- FlashcardsDefinition of tree risk. Tree risk is the combination of the likelihood of failure, the likelihood of impact on a target, and the consequences of that impact.
- Cheat sheetRisk is defined as the combination of likelihood of failure, likelihood of impact, and consequences of the failure; all three components must be evaluated, not failure likelihood alone.
- Key termsTree Risk Assessment. A structured process for identifying, analyzing, and evaluating the likelihood and consequences of a tree or tree part failing and causing harm to people, property, or targets of value.
- Study planDefine the three components of risk (likelihood of failure, likelihood of impact, consequences) and state how they combine into an overall risk rating.
- Common mistakesCandidates carry over informal arborist intuition ('that limb looks sketchy') and skip the two-axis structure the method requires, so the final rating reflects gut feel rather than the matrix cell.
- Exam-day guideBring the same ID you used for registration, with a signature and photo.