Units of speed are always a unit of length per unit of time. Different units of length and time may be chosen depending on the situation. This makes it easier to read the measurements. For example, ...

For most healthy adults, the average walking speed is about 3 miles per hour (mph). However, a person’s walking speed can vary, based on factors such as age, overall fitness level, and more. The above ...

Average speed cameras are becoming a more common sight on roads. (PA) Motoring experts have suggested that drivers should expect to see more average speed cameras on the roads in the years ahead.