You want to overtake on a tree-lined avenue. What special aspect should you bear in mind?

Your answer is completely correct. When overtaking on a tree-lined avenue, you need to be especially cautious for several reasons. First, drivers often misjudge the side clearance because the road is narrower due to the trees, which increases the risk of sideswiping. Second, vehicles with high bodies, such as trucks or buses, sometimes need to move unexpectedly to the left to avoid low-hanging branches, which can bring them into your path. Third, tree-lined roads have a higher risk of severe accidents, because collisions with trees at the roadside are particularly dangerous. Always overtake with extra care, ensure plenty of clearance, and be prepared for unexpected movements from other vehicles.