What should you use as a guide when driving in reduced visibility?

• Street signs and billboards
• The center line of the road
• Road edge lines or the right side of the road
  Explanation:

  "When driving in reduced visibility situations, use the road edge lines or the right side of the road as a guide. You may not see highway signs until too late. Yellow pavement markings should never be on your right side but always on your left side. Yellow is used to divide opposing roadway traffic and indicate the left travel edge of the roadway. "
• The headlights of oncoming traffic