diff --git a/autoware_launch/config/planning/scenario_planning/lane_driving/behavior_planning/behavior_path_planner/behavior_path_planner.param.yaml b/autoware_launch/config/planning/scenario_planning/lane_driving/behavior_planning/behavior_path_planner/behavior_path_planner.param.yaml
index 7a6bd05976..3e70681dbd 100644
--- a/autoware_launch/config/planning/scenario_planning/lane_driving/behavior_planning/behavior_path_planner/behavior_path_planner.param.yaml
+++ b/autoware_launch/config/planning/scenario_planning/lane_driving/behavior_planning/behavior_path_planner/behavior_path_planner.param.yaml
@@ -31,4 +31,4 @@
     expected_rear_deceleration_for_abort: -2.0
 
     rear_vehicle_reaction_time: 2.0
-    rear_vehicle_safety_time_margin: 2.0
+    rear_vehicle_safety_time_margin: 1.0
diff --git a/autoware_launch/config/planning/scenario_planning/lane_driving/behavior_planning/behavior_path_planner/lane_change/lane_change.param.yaml b/autoware_launch/config/planning/scenario_planning/lane_driving/behavior_planning/behavior_path_planner/lane_change/lane_change.param.yaml
index 41de868418..48eee8cbab 100644
--- a/autoware_launch/config/planning/scenario_planning/lane_driving/behavior_planning/behavior_path_planner/lane_change/lane_change.param.yaml
+++ b/autoware_launch/config/planning/scenario_planning/lane_driving/behavior_planning/behavior_path_planner/lane_change/lane_change.param.yaml
@@ -18,9 +18,9 @@
       lane_change_sampling_num: 10
 
       # collision check
-      enable_collision_check_at_prepare_phase: true
+      enable_collision_check_at_prepare_phase: false
       prepare_phase_ignore_target_speed_thresh: 0.1 # [m/s]
-      use_predicted_path_outside_lanelet: true
+      use_predicted_path_outside_lanelet: false
       use_all_predicted_path: false
 
       # abort