The　ceiling　gas　temperature　is　an　important　evaluation　indicator　for　determining　tunnel　fire　hazards.　The　maximum　and　longitudinal　distributions　of　the　ceiling　gas　temperature　are　studied　numerically　with　consideration　of　the　effect　of　longitudinal　fire　locations,　fire　heat　release　rate,　tunnel　aspect　ratio,　and　total　length　of　the　tunnel.　Results　show　that　as　the　fire　moves　from　the　middle　of　the　tunnel　to　the　upstream　(left　opening),　the　flame　tilts　to　the　downstream　(right　opening)　due　to　the　induced　longitudinal　flow　inside　the　tunnel.　The　tilting　angle　increases　as　the　fire　approaching　the　tunnel　opening.　Correspondingly,　the　position　of　the　resulting　maximum　ceiling　gas　temperature　is　shifted　from　right　above　the　fire　source　to　the　downstream　side.　An　offset　distance　is　used　to　quantify　this　phenomenon　and　an　empirical　equation　is　proposed　to　calculate　this　distance.　Meanwhile,　the　resulting　maximum　ceiling　gas　temperature　decreases.　An　empirical　equation　is　also　proposed　to　predict　the　evolutionary　trend　of　maximum　ceiling　gas　temperature　under　the　effect　of　the　longitudinal　fire　locations.　In　addition,　asymmetric　longitudinal　distributions　of　ceiling　gas　temperature　were　observed　in　the　upstream　and　downstream　directions.　The　ceiling　gas　temperature　decays　exponentially　in　both　directions　with　a　lower　decay　rate　on　the　shorter　side　(the　side　with　a　shorter　distance　between　the　fire　and　the　nearest　opening).　Corresponding　correlations　for　related　parameters　are　proposed　for　the　shorter　and　longer　side,　respectively.　©　2022　Elsevier　Masson　SAS