diff --git a/planning/behavior_path_planner/src/planner_manager.cpp b/planning/behavior_path_planner/src/planner_manager.cpp
index 608e8c45b2c04..4fb36a413bba4 100644
--- a/planning/behavior_path_planner/src/planner_manager.cpp
+++ b/planning/behavior_path_planner/src/planner_manager.cpp
@@ -141,17 +141,17 @@ void PlannerManager::generateCombinedDrivableArea(
   const auto & di = output.drivable_area_info;
   constexpr double epsilon = 1e-3;
 
+  const auto is_driving_forward_opt = motion_utils::isDrivingForward(output.path->points);
+  const bool is_driving_forward = is_driving_forward_opt ? *is_driving_forward_opt : true;
+
   if (epsilon < std::abs(di.drivable_margin)) {
     // for single free space pull over
-    const auto is_driving_forward_opt = motion_utils::isDrivingForward(output.path->points);
-    const bool is_driving_forward = is_driving_forward_opt ? *is_driving_forward_opt : true;
-
     utils::generateDrivableArea(
       *output.path, data->parameters.vehicle_length, di.drivable_margin, is_driving_forward);
   } else if (di.is_already_expanded) {
     // for single side shift
     utils::generateDrivableArea(
-      *output.path, di.drivable_lanes, false, data->parameters.vehicle_length, data);
+      *output.path, di.drivable_lanes, false, data->parameters.vehicle_length, data, is_driving_forward);
   } else {
     const auto shorten_lanes = utils::cutOverlappedLanes(*output.path, di.drivable_lanes);
 
@@ -163,7 +163,7 @@ void PlannerManager::generateCombinedDrivableArea(
     // for other modules where multiple modules may be launched
     utils::generateDrivableArea(
       *output.path, expanded_lanes, di.enable_expanding_hatched_road_markings,
-      data->parameters.vehicle_length, data);
+      data->parameters.vehicle_length, data, is_driving_forward);
   }
 
   // extract obstacles from drivable area