Which of the following is essential for effective communication with other drivers?

Using turn signals is essential for effective communication with other drivers because they serve as a visual indicator of your intentions on the road. When you use turn signals, you convey to other drivers that you plan to make a turn or change lanes, which allows them to anticipate your actions and respond appropriately. This reduces the likelihood of confusion and potential accidents, as all drivers can better understand and coordinate their movements based on the signals you provide.

Maintaining silence, driving at a constant speed, and keeping windows rolled up do not contribute to communication between drivers. Silence may prevent verbal communication, but it does not hinder the critical need for visual signaling. Driving consistently helps with overall safety but does not inform others of your specific intentions. Finally, keeping windows rolled up limits hand signals and may affect one's ability to hear other vehicles, but again, it does not fulfill the vital role that turn signals play in ensuring clarity and safety on the road.