How can a driver properly check their blind spots?

Using mirrors and turning the head to look over the shoulder is the best method for a driver to properly check their blind spots. This technique ensures that the driver is aware of all areas around the vehicle that are not visible through the rearview or side mirrors. While mirrors provide a general view of the surroundings, they may not capture everything, particularly in areas directly adjacent to the vehicle.

By turning their head, the driver can get a clearer view of any vehicles or obstacles that may be in these critical blind spots, enhancing safety when changing lanes or making turns. This practice is vital for avoiding collisions and ensuring that the driver has a complete understanding of their environment before making any maneuvers.

The other options do not provide a comprehensive method for blind spot checks. Relying solely on rearview mirrors can lead to missing important visual information, checking mirrors every 10 seconds may not necessarily cover blind spots effectively, and adjusting the seat position before driving is important for comfort and control but does not relate to the checking of blind spots directly.