What type of sign is rectangular in shape?

Rectangular signs are typically used for information or direction. These signs provide important guidance to drivers regarding the rules of the road, directions to particular locations, and other essential pieces of information. The rectangular shape is easily recognizable and indicates informational content, helping to ensure that drivers can quickly understand the message being conveyed.

While warning signs, yield signs, and no passing signs serve their respective purposes, they utilize different shapes. For example, warning signs are usually diamond-shaped to alert drivers to potential hazards, while yield signs are triangular to indicate the need to give way to other vehicles. No passing signs generally take on a circular shape. Therefore, the rectangular shape is specifically associated with informational and directional signage, making it the correct choice in this context.