Which of the following is NOT a common cause of motorist-related bicycle crashes?

The correct answer identifies a situation that is less frequently a direct cause of bicycle crashes compared to the other options listed. While running red lights can indeed lead to dangerous situations for all road users, it is more commonly associated with crashes involving other vehicles rather than specifically with bicycles.

Motorists failing to yield, turning right across bicycle traffic, and turning left in front of bicycles are all more prevalent causes of crashes involving cyclists. These scenarios often occur in common traffic situations where cyclists are using designated bike lanes or riding in traffic, and they directly involve the cyclist being at risk due to the motorist's actions.

Understanding the dynamics of these interactions emphasizes the importance of awareness and caution among motorists when navigating near bicycles. It's crucial for drivers to be particularly attentive to yielding to cyclists, recognizing their presence when turning, and ensuring safe crossing behaviors to prevent collisions.