What is the appropriate response if you see a car making a left turn in front of you?

The appropriate response when you see a car making a left turn in front of you is to be ready to stop or change lanes if necessary. This is crucial for your safety and the safety of others on the road. When a vehicle is turning left, it may not have clear visibility of oncoming traffic or might misjudge the speed of approaching vehicles, including motorcycles. By being prepared to stop or change lanes, you maintain control and can react appropriately to avoid a collision.

This approach allows for proactive safety measures; if the turning car fails to yield the right-of-way, being ready to stop can prevent an accident. Additionally, if it becomes apparent that stopping isn't enough to avoid danger, changing lanes could provide a safe escape route.

The other options do not adequately prioritize safety. Speeding up could increase the risk of a collision, assuming the driver sees you ignores the reality that not all motorists are vigilant, and swerving without assessing the situation could lead to losing control or colliding with other vehicles or obstacles. Being prepared to stop or change lanes encompasses a defensive riding strategy that prioritizes awareness and caution.