What defines Time Mean Speed in traffic engineering?

Time Mean Speed in traffic engineering is specifically defined as the sum of the speeds of all vehicles observed over a specific time period, divided by the number of vehicles. This average incorporates all vehicles traveling through a particular point, providing a collective measure of the speed of traffic flow.

This measurement is particularly valuable because it reflects how traffic behaves at a specific location over time, accounting for variations in speed that occur due to different driving behaviors, road conditions, and other factors. Time Mean Speed can help traffic engineers understand congestion levels and optimize road design or traffic management strategies.

In contrast, the options regarding maximum speeds, specific distances, or the speed at which most vehicles travel focus on different criteria and do not accurately represent the essence of Time Mean Speed as defined in traffic engineering principles.