When root pruning or trenching around a roadside tree, what is the maximum amount of root that may be cut without approval?

• A. 0.5 inch
• B. 1 inch
• C. 1.5 inches
• D. 2 inches

Answer: (B)

Root pruning near a roadside tree must be done with care because removing roots affects the tree’s stability and ability to take up water and nutrients. To protect trees, there’s a limit on how much root can be removed without getting a permit: you may cut up to one inch in diameter of roots without approval. If any roots larger than that must be removed, you need written authorization before proceeding. Keeping removals within this limit helps preserve the tree’s health and reduces the risk of failure, even as smaller reductions can be done without special approval.