baliza

noun
  1. A buoy or marker used in maritime navigation to indicate hazards, channels, or mooring locations. noun
    The ship's captain carefully navigated the channel using the baliza as a guide.
    Divers placed a baliza near the coral reef to warn boats of the shallow waters.
  2. A traffic cone or similar device used to guide or warn drivers on the road. noun
    The construction crew set up a series of balizas to redirect traffic away from the work zone.
    During the marathon, balizas were used to mark the route for the runners.