What defines blind spots in relation to driving?

Blind spots refer to specific areas around a vehicle that are not visible to the driver through the mirrors. This can create hazardous situations while driving, as objects or other vehicles located in these areas may remain unseen until it’s too late to react properly.

In terms of driving safety, understanding the concept of blind spots is crucial. All vehicles have blind spots, typically areas to the left, right, and directly behind, depending on the design of the vehicle and its mirrors. This is why drivers are advised to physically turn their heads to check these areas before making lane changes or backing up, as relying solely on mirrors can lead to accidents.

The other options provided do not correctly describe the concept of blind spots. Transitioning into a tunnel does not pertain to the notion of visibility around a vehicle. Temporary blindness from alcohol is related to impairment rather than the physical layout of the vehicle's visibility. Areas off to the side when backing may refer to blind spots, but it is a more limited definition and does not encompass the full range of blind spots around the vehicle.