Railroad crossing signs/signals: Don’t cross tracks if a train is approaching.Keep Right/Keep Left/Divided Highway Begins signs: Avoid the obstacle.Do Not Enter, Wrong Way, and One-Way signs: Don’t ignore them and end up traveling in the wrong direction.Work zone signs, Detour signs, Flagger signs, and work zones: Watch for workers, sudden changes of direction, merging lanes, etc.Pedestrians in the street: Watch for pedestrians (or animals) that may suddenly dart out into your path.Crosswalks: You must yield to pedestrians in crosswalks.Stop (or Yield) to Pedestrians: You must do so.Also, if it’s the vehicles on the cross or merging road that encounter the yield sign, you must watch for vehicles that ignore the yield sign and fail to yield to you. Yield signs: If you encounter a yield sign, you must yield to approaching vehicles.