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Defensive driving requires that you anticipate the possible moves of the traffic around you. Anticipating the actions of other motorists is doable because you’re a motorist yourself. However, doing the same for semi-trucks is more difficult because their handling and maneuvering capabilities are radically different from any vehicle you are used to driving. It’s especially important to watch for dangerous maneuvers that some less-than-professional truck drivers might try. Here are three such maneuvers to watch for: Quick Lane Switching A semi-truck has big blind spots on its left and right.