diff --git a/autoware_launch/config/planning/scenario_planning/lane_driving/motion_planning/obstacle_avoidance_planner/obstacle_avoidance_planner.param.yaml b/autoware_launch/config/planning/scenario_planning/lane_driving/motion_planning/obstacle_avoidance_planner/obstacle_avoidance_planner.param.yaml
index 6fc770d548..3f4655b782 100644
--- a/autoware_launch/config/planning/scenario_planning/lane_driving/motion_planning/obstacle_avoidance_planner/obstacle_avoidance_planner.param.yaml
+++ b/autoware_launch/config/planning/scenario_planning/lane_driving/motion_planning/obstacle_avoidance_planner/obstacle_avoidance_planner.param.yaml
@@ -110,7 +110,7 @@
         avoidance_cost_margin: 0.0                       # [m]
         avoidance_cost_band_length: 5.0                  # [m]
         avoidance_cost_decrease_rate: 0.05               # decreased cost per point interval
-        min_drivable_width: 0.2 # [m] The vehicle width and this parameter is supposed to be kept in the optimization's constraint
+        min_drivable_width: 0.2                          # [m] The vehicle width and this parameter is guaranteed to keep for collision free constraint.
 
         weight:
           lat_error_weight: 0.0     # weight for lateral error