Using a **mobile phone** while driving is one of the main causes of **distraction-related accidents**. This is because the driver pays more attention to the conversation than to the road, which can lead to **vehicle trajectory deviations**. These deviations include leaving the road or invading the opposite lane, as the driver is not fully focused on driving.

Additionally, holding the phone in the hand or on the shoulder makes it difficult to handle the steering wheel, increasing the risk of losing control of the vehicle. Although hands-free devices allow talking without touching the phone, they are also dangerous because the driver remains distracted by the conversation.

For these reasons, it is important to avoid using the phone while driving to prevent accidents caused by **trajectory deviations**.