What does a solid white line on your left indicate?

A solid white line on your left indicates that you may not change lanes. This signal is designed to provide clear guidance to drivers about lane usage and road rules. The solid white line acts as a boundary that denotes that moving into another lane could be unsafe or against the regulations, helping to maintain traffic flow and safety. It alerts drivers that crossing this line is prohibited, which is particularly important in scenarios where lane changes might lead to conflicts with other vehicles or road users. Therefore, when you see a solid white line, it's essential to stay in your lane and avoid making any unauthorized lane changes.