CDL Doubles/Triples Endorsement Practice Exam

Observing the trailer’s movement in your mirrors is the best method for checking for trailer sway while driving. This visual assessment allows you to see how the trailer is tracking behind the vehicle. If the trailer begins to sway, it will become evident in the mirrors as the rear of the trailer moves side to side. Maintaining awareness of the trailer's behavior is crucial, especially at higher speeds or under conditions that might increase the risk of sway, such as strong winds or uneven road surfaces. By consistently checking the trailer’s position using the mirrors, the driver can identify any swaying issues early and take appropriate measures to correct the situation, such as reducing speed or adjusting the load. Listening for unusual sounds or feeling vibrations through the steering wheel, while they might provide cues about other issues, do not directly indicate whether the trailer is swaying. These methods are less effective for assessing sway compared to visually monitoring the trailer’s movement. Checking the trailer lights for malfunctioning can be important for safety compliance but does not relate to sway detection specifically.