**Elderly people** and **children** are the population groups with the highest percentage of traffic accidents. This is because both groups are considered **risk groups**.

- **Elderly people**: Drivers over 65 years old have a higher risk of having accidents. This may be due to factors such as decreased reflexes and motor skills with age.

- **Children**: As pedestrians, children are also in a high-risk group. Their lack of experience and lower ability to assess dangerous situations contribute to their vulnerability in traffic.

In summary, both elderly people and children are more prone to traffic accidents, whether as drivers or pedestrians, due to their specific characteristics that make them more vulnerable on public roads.