Which of the following is a crucial step before changing lanes?

Timing your lane change appropriately is a crucial step because it involves ensuring that it is safe to make the maneuver without endangering yourself or other road users. This means you need to assess the speed of vehicles in adjacent lanes, their distance from your vehicle, and any potential obstacles or hazards. Proper timing allows you to execute the lane change smoothly and without causing disruptions in traffic.

Neglecting to check mirrors or signaling properly can create dangerous situations, as not being aware of your surroundings would inhibit safe lane changes. Additionally, only checking one mirror provides an incomplete view of the road and could lead to missing critical information that could affect your decision to change lanes. Therefore, effectively timing your lane change is essential for maintaining safety on the road.