When driving on a road frequented by **pedestrians**, especially **children** or **elderly people**, it is crucial to **reduce speed** and even **stop** if necessary. This is due to several reasons:

- **Vulnerability of pedestrians**: Pedestrians, especially children and the elderly, are more likely to suffer **serious injuries** in the event of a collision. The severity of injuries increases on roads where vehicles travel at higher speeds.

- **Pedestrian preference**: Pedestrians have the right of way at pedestrian crossings, sidewalks, and other pedestrian areas. Additionally, drivers must yield to organized groups, such as school excursions, and to people getting on or off public transport.

- **Additional precautions**: In areas with pedestrians, it is essential to drive at a **moderate speed** and with **extra care** to avoid accidents. This includes paying attention to distracted pedestrians, such as those using mobile phones, and being cautious near stopped school buses.


For these reasons, the correct option is to **reduce speed and even stop** to ensure the safety of pedestrians.