Dashed lines are lines that consist of short segments separated by gaps. They are commonly used in various fields, including road design, graphic design, and mathematics. In road design, dashed lines often indicate lanes that can be crossed, while in graphic design, they can be used to create visual interest or guide the viewer's eye. In mathematics, dashed lines can represent different concepts, such as boundaries or limits in graphs. They help distinguish between solid lines, which typically indicate definite values or connections. Overall, dashed lines serve as a useful tool for conveying information clearly and effectively.