What shape are guide signs usually?

Guide signs are typically rectangular in shape. This shape has been standardized because it allows for clear communication of information necessary for drivers, such as directional guidance and distance to various destinations. The rectangular design provides a large enough area for text and symbols, ensuring that important information can be easily read from a distance. This shape is intuitive for drivers, as it denotes information that may be helpful for navigation without indicating any particular warning or restriction, which are often presented in other shapes.