BullpenAl/ShutterstockDriving means constantly passing different road signs of various shapes and colors, each indicating a unique piece of vital information. One of the more common road sign shapes around is a diamond. Typically these diamond signs are yellow and mostly feature either a black symbol or black text. Diamond-shaped road signs are there to signal some kind of warning to drivers, and the spectrum of warnings of which they encompass are vast.The most common — or at least the kind with most variations — show you what to expect on the road ahead of you. These put a black arrow on the sign to indicate an upcoming curve, a sharp turn, merging traffic, and more. There are also versions with solid lines instead of arrows, which show the driver the design of an upcoming intersection to know where other cars are coming from. Sometimes the arrows are accompanied by other symbols, such as the image of a white speed limit sign or a stoplight. These let the driver know of other important upcoming road signs they need to prepare for.Other yellow diamond signs don't feature arrows at all and instead use symbols. For instance, you can see one of these signs with the silhouette of an animal, such as a deer or a cow, to telegraph that these animals may be crossing the road at any point. There are versions of this with vehicle silhouettes too, like tractors or firetrucks, to warn of their possible crossing as well. By making all of these a standardized yellow diamond, you easily communicate to drivers to stay alert for something important.Non-yellow diamond-shaped road signsSEEphotos7171/ShutterstockYellow diamond-shaped road signs are easily the most common, but they can be other colors too. These signs still serve as warnings for drivers, but they're for more specific circumstances.Orange diamond-shaped signs are used in and around road construction sites and are for temporary use until construction has been completed. If there's text on the sign, it will typically be telling drivers that either work is being done ahead or a certain section of the road is closed. If there's a symbol on them, it could be a general warning of workers being ahead or that there's a flagger on the road who's directing traffic. Obviously, it's important to be extra mindful when actual people are on the road and not just machines.Fluorescent yellow-green (FYG) diamond-shaped signs first emerged in the early 1990s and are used in school zones. They can indicate pedestrian crossings, bicycle crossings, handicapped crossings, forthcoming playgrounds, or any other important warning. You may occasionally see FYG signs outside of school zones, but some states reserve them strictly for these areas. This is where you'll also see the pentagon-shaped school pedestrian crossing signs too. These signs were originally the standard yellow, but they were changed to this brighter color to put further emphasis on safety in an area with many children. This has been the required color across the United States since 2009, though it's still inconclusive as to whether this new color has meaningfully improved school zone safety.
