According to the SMOG-C acronym, what is the first step when changing lanes?

The first step when changing lanes, as outlined by the SMOG-C acronym, is to signal. Signaling is crucial because it informs other drivers of your intention to change lanes, which enhances safety for both you and those around you. Using your turn signal lets nearby vehicles know to prepare for your movement, allowing them to react appropriately and helping to prevent potential collisions.

The other steps in SMOG-C, such as checking mirrors and looking over your shoulder, come after signaling, as they are part of the process that ensures the lane change can be performed safely. Signaling first initiates the communication about your intended action, thus establishing a clear intention before you proceed to check your surroundings or actually make the maneuver.