ยง 1261. Traffic  laws apply to persons riding or leading horses. Every
  person riding or leading a horse upon a roadway  shall  be  granted  all
  rights  and  shall be subject to all the duties applicable to the driver
  of a vehicle by this title, except as to  special  regulations  in  this
  article  and  except as to those provisions of this title which by their
  nature can have no application.