Can you tell which dots are perfectly centered within these 10 shapes and which are slightly off? Business Insider Subscribe Newsletters ...

Simple shapes, like a rectangle on a street sign, ... The DOT has standardized signs. A yellow diamond shape almost always indicates a warning like merging traffic ahead or an added lane.

Horizontal rectangular shape. These signs provide general information to the driver. From them, you can learn the location of the nearest stops or gas stations, roadside attractions, and places to eat ...