diff --git a/autoware_launch/config/planning/scenario_planning/lane_driving/behavior_planning/behavior_velocity_planner/blind_spot.param.yaml b/autoware_launch/config/planning/scenario_planning/lane_driving/behavior_planning/behavior_velocity_planner/blind_spot.param.yaml
index 5af1c99f8a..7963766c03 100644
--- a/autoware_launch/config/planning/scenario_planning/lane_driving/behavior_planning/behavior_velocity_planner/blind_spot.param.yaml
+++ b/autoware_launch/config/planning/scenario_planning/lane_driving/behavior_planning/behavior_velocity_planner/blind_spot.param.yaml
@@ -3,7 +3,8 @@
     blind_spot:
       use_pass_judge_line: true
       stop_line_margin: 1.0 # [m]
-      backward_length: 15.0 # [m]
+      backward_length: 50.0 # [m]
       ignore_width_from_center_line: 0.7 # [m]
       max_future_movement_time: 10.0 # [second]
       threshold_yaw_diff: 0.523 # [rad]
+      adjacent_extend_width: 1.5 # [m]