What term refers to the phenomenon of speeding without realizing it?

The term that refers to the phenomenon of speeding without realizing it is "Velocitation." This occurs when a driver becomes so accustomed to the speed in which they are traveling, often on highways or open roads, that they fail to notice they are exceeding the speed limit. It highlights the importance of remaining vigilant about speed, even when driving feels routine or comfortable.

In contrast to the other terms, "Hyperspeed" is not commonly used in traffic contexts and does not specifically relate to driving speeds. "Acceleration" refers to the increase in speed of a vehicle and does not imply any unaware action. "Overdrive" generally refers to a mechanism in a vehicle that allows it to run more efficiently at higher speeds, but does not denote the experience of unintentionally speeding. Thus, "Velocitation" is the most accurate term for this phenomenon.