Answer:
Drivers who value speed and convenice more than hose in the stop and go lanes and are willing to pay additional express pass fees for the option of avoiding traffic jams.
Explanation:
In this scenario the driver's Choi's to buy the express pass expresses their preference for fast and convinient commute. They are willing to pay for access to the express way to get it.
Those that still use the highway and endure the the stop and go traffic value the money they will pay for a pass above the speed and convinience of using the express way.