Which of the following is a high-risk situation where motorcycle crashes are most likely to occur?

Left turns are indeed a high-risk situation for motorcycle crashes. This is primarily due to the increased complexity and potential for conflicts with oncoming traffic. When making a left turn, a motorcyclist must judge the speed and distance of approaching vehicles, while also navigating their own path safely, which can be particularly challenging due to smaller visibility and misjudgment by other drivers.

Left turns often expose motorcycles to intersection-related hazards, where drivers in passenger vehicles may fail to see the motorcycle or misinterpret its speed, leading to collision risks. Additionally, the dynamics involved with leaning and maneuvering a motorcycle while turning add to the difficulty, as riders must balance their line of sight with appropriate speed and angle.

While other situations like right turns, roundabouts, and riding between lanes can also pose risks, they typically do not present the same combination of hazards found with left turns at intersections, making left turns particularly high-risk for motorcycle riders.