diff --git a/modules/prediction/evaluator/evaluator_manager.cc b/modules/prediction/evaluator/evaluator_manager.cc
index 8ea902d94adef4154636d3280934e9f4bc06a9c3..6cb7843e89e482ea18009a177f38626fb7ba71c9 100644
--- a/modules/prediction/evaluator/evaluator_manager.cc
+++ b/modules/prediction/evaluator/evaluator_manager.cc
@@ -238,35 +238,40 @@ void EvaluatorManager::EvaluateObstacle(Obstacle* obstacle,
   // Select different evaluators depending on the obstacle's type.
   switch (obstacle->type()) {
     case PerceptionObstacle::VEHICLE: {
-      if (obstacle->HasJunctionFeatureWithExits() &&
-          !obstacle->IsCloseToJunctionExit()) {
-        if (obstacle->latest_feature().priority().priority() ==
-            ObstaclePriority::CAUTION) {
+      if (obstacle->latest_feature().priority().priority() ==
+          ObstaclePriority::CAUTION) {
+        if (obstacle->IsNearJunction()) {
           evaluator = GetEvaluator(vehicle_in_junction_caution_evaluator_);
-          CHECK_NOTNULL(evaluator);
-          if (evaluator->Evaluate(obstacle, obstacles_container)) {
-            break;
-          }
-        }
-        evaluator = GetEvaluator(vehicle_in_junction_evaluator_);
-        CHECK_NOTNULL(evaluator);
-        evaluator->Evaluate(obstacle, obstacles_container);
-      } else if (obstacle->IsOnLane()) {
-        if (obstacle->latest_feature().priority().priority() ==
-            ObstaclePriority::CAUTION) {
+        } else if (obstacle->IsOnLane()) {
           evaluator = GetEvaluator(vehicle_on_lane_caution_evaluator_);
         } else {
-          evaluator = GetEvaluator(vehicle_on_lane_evaluator_);
+          evaluator = GetEvaluator(vehicle_default_caution_evaluator_);
         }
         CHECK_NOTNULL(evaluator);
-        if (evaluator->GetName() == "LANE_SCANNING_EVALUATOR") {
-          evaluator->Evaluate(obstacle, obstacles_container, dynamic_env);
+        // Evaluate and break if success
+        if (evaluator->Evaluate(obstacle, obstacles_container)) {
+          break;
         } else {
-          evaluator->Evaluate(obstacle, obstacles_container);
+          AERROR << "Obstacle: " << obstacle->id()
+                 << " caution evaluator failed, downgrade to normal level!";
         }
+      }
+      // if obstacle is not caution or caution_evaluator run failed
+      if (obstacle->HasJunctionFeatureWithExits() &&
+          !obstacle->IsCloseToJunctionExit()) {
+        evaluator = GetEvaluator(vehicle_in_junction_evaluator_);
+      } else if (obstacle->IsOnLane()) {
+        evaluator = GetEvaluator(vehicle_on_lane_evaluator_);
       } else {
         ADEBUG << "Obstacle: " << obstacle->id()
                << " is neither on lane, nor in junction. Skip evaluating.";
+        break;
+      }
+      CHECK_NOTNULL(evaluator);
+      if (evaluator->GetName() == "LANE_SCANNING_EVALUATOR") {
+        evaluator->Evaluate(obstacle, obstacles_container, dynamic_env);
+      } else {
+        evaluator->Evaluate(obstacle, obstacles_container);
       }
       break;
     }
diff --git a/modules/prediction/evaluator/evaluator_manager.h b/modules/prediction/evaluator/evaluator_manager.h
index f338444681273c0e7cb8c4d1f4514846fea319e9..f6deadfa9d42ae1ce16d9b670aa4e487e7d12591 100644
--- a/modules/prediction/evaluator/evaluator_manager.h
+++ b/modules/prediction/evaluator/evaluator_manager.h
@@ -108,6 +108,9 @@ class EvaluatorManager {
   ObstacleConf::EvaluatorType vehicle_in_junction_caution_evaluator_ =
       ObstacleConf::JUNCTION_MAP_EVALUATOR;
 
+  ObstacleConf::EvaluatorType vehicle_default_caution_evaluator_ =
+      ObstacleConf::SEMANTIC_LSTM_EVALUATOR;
+
   ObstacleConf::EvaluatorType cyclist_on_lane_evaluator_ =
       ObstacleConf::CYCLIST_KEEP_LANE_EVALUATOR;