Final answer:
To prevent highway hypnosis, a driver should avoid focusing on any single object for too long and should keep their attention moving.
Step-by-step explanation:
To avoid highway hypnosis when driving on an expressway, it is a good practice to avoid looking at any one thing for more than a few seconds. This strategy helps because it keeps your attention active and prevents the mind from becoming too relaxed or zoning out. Alternating your gaze between the road ahead, your mirrors, and the surrounding traffic helps maintain a high level of alertness. Additionally, taking breaks if you are feeling fatigued, staying hydrated, and ensuring that you are well-rested before driving can help prevent highway hypnosis.