**Neurological disorders** and **mental illnesses** increase the risk of traffic accidents. This is because these conditions can affect a person's **attention capacity** and **reaction time**, which are crucial for responding adequately to unforeseen situations on the road.

For example, people over 65 years old, who often experience a decline in these abilities, have a higher risk of accidents. This is because they may have **less capacity to pay attention** and **need more time to react** to an unexpected event. Additionally, they may be affected by medications that alter their ability to drive safely.

In contrast, **dermatological** and **respiratory** diseases do not directly affect the cognitive or reaction skills necessary for driving, so they do not represent as high a risk of traffic accidents as neurological disorders and mental illnesses.