A right read (also known as right hand read) is the side of the out-of-home (OOH) sign that is seen on the right-hand side of the street, while the left-hand read (also known as cross read) is the side that is always seen on the other side of the road, beyond the lane carrying traffic the other direction. In almost all cases, the right-hand read of a billboard or outdoor advertising sign is considered the more desirable side.
Click here to browse the full billboard terminology glossary