Road signs are grouped into a few main categories, and recognizing the category helps you react faster.
Regulatory signs (usually red or black) tell you what you must or must not do — stop, yield, speed limits.
Warning signs (typically yellow, diamond-shaped) alert you to hazards ahead, like curves, pedestrian crossings, or merging traffic.
Guide signs (usually green or blue) give you directions, distances, and information about services.
Spend a little time reviewing your local driver’s handbook — sign recognition is one of the easiest things to study ahead of your test, and it becomes second nature quickly once you’re driving regularly.