What type of signs warn you of hazards?

Answer: A — Warning signs

Warning signs warn you of hazards ahead. They are designed to grab attention with a bright color and a simple symbol so you get the message early enough to react. Most warning signs are yellow (often diamond-shaped) with black graphics that depict the upcoming danger, like a sharp curve, merging traffic, a pedestrian crossing, or a slippery surface. The goal is to give you time to slow down, adjust your speed, or change your lane to stay safe. Other types of signs do different jobs: regulatory signs tell you what you must or must not do (like speed limits or stop/yield rules); informational signs give general information (like services or road names); directional signs guide you on routes and distances.