To reduce the risk of pedestrian accidents, it is essential for drivers to **moderate their speed in areas where there may be crowds of people**. This is due to several reasons:

- **Higher risk in urban areas**: Pedestrian accidents are more common in areas where drivers cannot see well due to obstacles. In these zones, it is crucial for drivers to reduce their speed to have more reaction time to any unforeseen events, such as a pedestrian crossing unexpectedly.

- **Defensive driving**: This driving style involves always being attentive to what other road users might do, including pedestrians. By moderating speed, drivers can react more appropriately to unexpected situations, such as a child running towards the road.

- **Prevention of serious accidents**: When a vehicle hits a pedestrian, the consequences are usually very serious, especially if the vehicle is traveling at high speed. Reducing speed decreases the severity of injuries in the event of an accident.

- **Attention to unsafe areas**: These are areas where unforeseen events may arise, such as pedestrians suddenly crossing. Driving at a moderate speed allows drivers to be better prepared to stop or maneuver if necessary.

In summary, moderating speed in areas with potential crowds of people is a key measure to protect pedestrians and avoid serious accidents.