What is the safest method for changing lanes in a truck?

The safest method for changing lanes in a truck involves signaling your intention, checking mirrors, and then making the lane change. This method ensures that other drivers are aware of your intention to move, which is crucial given the size and visibility challenges associated with large trucks.

By signaling, you communicate your next action to other road users, thereby minimizing the risk of collisions. Checking your mirrors helps in assessing the position of vehicles in your vicinity, and it's essential for understanding the traffic dynamics around you. Finally, while changing lanes, you should also perform a visual check of your blind spots to ensure that no vehicles are present in areas that are not visible in your mirrors.

This comprehensive approach reduces the likelihood of accidents and enhances safety on the road, especially given that trucks have larger blind spots than smaller vehicles. The other methods mentioned do not promote the safety standards required for lane changes.