Final answer:
Typically, the speed limit in residential or school zones is around 30 mph or approximately 50 km/h, which reflects a balance between traffic flow and the safety of pedestrians in these areas.
Step-by-step explanation:
The speed limit in a residential or school zone typically varies depending on the country and the specific regulations of that area. Nevertheless, it is not uncommon for the speed limit in these zones to be set around 30 miles per hour (mph) or approximately 50 kilometers per hour (km/h).
This speed is intended to enhance safety in areas where children and families are likely to be present. The de jure speed limit is the legally posted speed, while the de facto speed limit might consider a small buffer over which the police may enforce the limit more strictly.
It's essential to be aware that many vehicles speed through intersections without regard to the posted speed limit, but traffic signals and law enforcement practices are in place to encourage adherence to these limits for the safety of the community.