If a driver is making a lane change, what should they ensure before proceeding?

When making a lane change, it is crucial for a driver to ensure that no one is in their blind spot. The blind spot is the area around the vehicle that cannot be directly observed by the driver while looking through the mirrors. It is essential to check these areas to confirm that it is safe to change lanes and that other drivers, cyclists, or pedestrians are not in those areas. Failing to do so could result in a collision, as the driver may not be aware of other road users who might be close by.

While the other considerations, such as weather conditions, speed limits, and having windows open, can contribute to overall driving safety, they do not directly impact the immediate safety of performing a lane change. Clear weather can help visibility but is not a requirement for safely changing lanes if the blind spot is checked. Adhering to speed limits is important, but lane changes can still be made safely at various speeds as long as the blind spot is clear. Having windows open may improve visibility, but it is not a necessity and does not directly affect the safety of the lane change. Therefore, ensuring that there are no vehicles in the blind spot remains the primary concern when changing lanes.