This is due to the fact that the fundamental empirical features of traffic breakdown at highway bottlenecks have been understood only during last 20 years. In contrast, the generally accepted fundamentals and methodologies of traffic and transportation theory have been introduced in the 50s–60s. Examples of this classical traffic flow theories are the Lighthill–Whitham–Richards (LWR) model, General Motors (GM) traffic-flow model of Herman, Gazis, Montroll, Potts, and Rothery, as well as Wardrop’s principles for optimization of transportation networks. Thus the scientists whose ideas led to these classical fundamentals and methodologies of traffic and transportation theory could not know the nucleation nature of real traffic breakdown. Many of the diverse driver behavioral characteristics related to real traffic as well as some of the mathematical approaches to traffic flow modeling, which have been discovered in classical approaches to traffic flow theory, are also used in three-phase traffic theory and associated microscopic traffic flow models (for more details, see Sec. 11 of a review).