This　study　investigates　the　impact　of　Augmented　Reality　Head-Up　Display　(AR-HUD)　lane　enhancement　system　on　lateral　control　performance　in　fog　conditions.　Using　Unity-based　simulations,　a　controlled,　immersive　driving　scenario　in　fog　was　created　to　assess　the　impact　of　the　AR-HUD　system　on　lateral　control　performance.　Participants　drove　on　a　curved　road　in　a　foggy　environment　while　their　lateral　control　metrics,　specifically　steering　speed　(SS)　and　standard　deviation　of　lateral　position　(SDLP),　were　monitored.　The　results　showed　that　the　AR-HUD　system　significantly　reduced　SS　and　SDLP　in　all　driving　segments,　demonstrating　improved　steering　accuracy　and　stability.　Notably,　the　most　significant　improvements　were　observed　during　the　initial　phase　when　foggy　conditions　were　encountered,　i.e.,　the　Approach　Segment,　highlighting　the　utility　of　the　AR-HUD　when　transitioning　to　low　visibility　conditions.　©　2024　SPIE.