Final answer:
The typical speed limit within city limits is 50 kph or about 31 mi/h, facilitating safe road crossings and urban traffic flow.
Step-by-step explanation:
The speed limit within city limits, unless otherwise posted, is typically 50 kilometers per hour (50 kph). This is a common speed limit for residential areas in cities, which helps to ensure the safety of pedestrians and drivers alike. For instance, when crossing the road, a person should be able to walk at least 4 meters, which is 2 meters more than the width of an average car, before the car reaches them if it's traveling at the city speed limit. On interstate highways, the speed limits are often higher, with some set around 100 kilometers per hour (100 kph). The conversion for speeds from km/h to miles per hour (mi/h) is useful for understanding speed limits in different units; for example, 50 kph is approximately 31 mi/h.