There are many examples of transportation facilities being outdated from their very first day of service. In fact, it is observed that travel times can increase on supposedly new, improved facilities. Discuss this phenomenon with reference to the following figure. a$)$ Identify by number the functions that represent the old highway, the new $($improved$)$ highway, the old activity system, and the new activity system: b$)$ Describe the relative magnitudes of the equilibrium volumes and travel times for the old and new highways: