diff --git a/modules/prediction/common/prediction_map.cc b/modules/prediction/common/prediction_map.cc
index c7d7d3ce822e9a2b3d6d338be95d10eb3cc1c459..a45874273b62b2c30da94d9c44501b8c819353ba 100644
--- a/modules/prediction/common/prediction_map.cc
+++ b/modules/prediction/common/prediction_map.cc
@@ -80,13 +80,10 @@ double PredictionMap::LaneTotalWidth(
   return left + right;
 }
 
-std::shared_ptr<const LaneInfo> PredictionMap::LaneById(const Id& id) {
-  return HDMapUtil::instance()->BaseMapRef().get_lane_by_id(id);
-}
-
 std::shared_ptr<const LaneInfo> PredictionMap::LaneById(
     const std::string& str_id) {
-  return LaneById(apollo::hdmap::MakeMapId(str_id));
+  return HDMapUtil::instance()->BaseMapRef().get_lane_by_id(
+      apollo::hdmap::MakeMapId(str_id));
 }
 
 void PredictionMap::GetProjection(const Eigen::Vector2d& position,
@@ -162,16 +159,14 @@ void PredictionMap::OnLane(
 
 double PredictionMap::PathHeading(std::shared_ptr<const LaneInfo> lane_info,
                                   const apollo::common::PointENU& point) {
-  apollo::common::math::Vec2d vec_point;
-  vec_point.set_x(point.x());
-  vec_point.set_y(point.y());
+  apollo::common::math::Vec2d vec_point = {point.x(), point.y()};
   double s = -1.0;
   double l = 0.0;
   lane_info->get_projection(vec_point, &s, &l);
   return HeadingOnLane(lane_info, s);
 }
 
-int PredictionMap::SmoothPointFromLane(const apollo::hdmap::Id& id,
+int PredictionMap::SmoothPointFromLane(const std::string& id,
                                        const double s, const double l,
                                        Eigen::Vector2d* point,
                                        double* heading) {
@@ -203,10 +198,11 @@ void PredictionMap::NearbyLanesByCurrentLanes(
         continue;
       }
       for (auto& lane_id : lane_ptr->lane().left_neighbor_forward_lane_id()) {
-        if (lane_ids.find(lane_id.id()) != lane_ids.end()) {
+        const std::string& id = lane_id.id();
+        if (lane_ids.find(id) != lane_ids.end()) {
           continue;
         }
-        std::shared_ptr<const LaneInfo> nearby_lane = LaneById(lane_id);
+        std::shared_ptr<const LaneInfo> nearby_lane = LaneById(id);
         double s = -1.0;
         double l = 0.0;
         GetProjection(point, nearby_lane, &s, &l);
@@ -214,14 +210,15 @@ void PredictionMap::NearbyLanesByCurrentLanes(
             ::apollo::common::math::DoubleCompare(std::fabs(l), radius) > 0) {
           continue;
         }
-        lane_ids.insert(lane_id.id());
+        lane_ids.insert(id);
         nearby_lanes->push_back(nearby_lane);
       }
       for (auto& lane_id : lane_ptr->lane().right_neighbor_forward_lane_id()) {
-        if (lane_ids.find(lane_id.id()) != lane_ids.end()) {
+        const std::string& id = lane_id.id();
+        if (lane_ids.find(id) != lane_ids.end()) {
           continue;
         }
-        std::shared_ptr<const LaneInfo> nearby_lane = LaneById(lane_id);
+        std::shared_ptr<const LaneInfo> nearby_lane = LaneById(id);
         double s = -1.0;
         double l = 0.0;
         GetProjection(point, nearby_lane, &s, &l);
@@ -229,7 +226,7 @@ void PredictionMap::NearbyLanesByCurrentLanes(
             ::apollo::common::math::DoubleCompare(std::fabs(l), radius) > 0) {
           continue;
         }
-        lane_ids.insert(lane_id.id());
+        lane_ids.insert(id);
         nearby_lanes->push_back(nearby_lane);
       }
     }
@@ -246,7 +243,7 @@ bool PredictionMap::IsLeftNeighborLane(
     return false;
   }
   for (auto& left_lane_id : curr_lane->lane().left_neighbor_forward_lane_id()) {
-    if (id_string(left_lane) == left_lane_id.id()) {
+    if (left_lane->id().id() == left_lane_id.id()) {
       return true;
     }
   }
@@ -278,7 +275,7 @@ bool PredictionMap::IsRightNeighborLane(
   }
   for (auto& right_lane_id :
        curr_lane->lane().right_neighbor_forward_lane_id()) {
-    if (id_string(right_lane) == right_lane_id.id()) {
+    if (right_lane->id().id() == right_lane_id.id()) {
       return true;
     }
   }
@@ -309,7 +306,7 @@ bool PredictionMap::IsSuccessorLane(
     return false;
   }
   for (auto& successor_lane_id : curr_lane->lane().successor_id()) {
-    if (id_string(succ_lane) == successor_lane_id.id()) {
+    if (succ_lane->id().id() == successor_lane_id.id()) {
       return true;
     }
   }
@@ -340,7 +337,7 @@ bool PredictionMap::IsPredecessorLane(
     return false;
   }
   for (auto& predecessor_lane_id : curr_lane->lane().predecessor_id()) {
-    if (id_string(pred_lane) == predecessor_lane_id.id()) {
+    if (pred_lane->id().id() == predecessor_lane_id.id()) {
       return true;
     }
   }
@@ -367,7 +364,7 @@ bool PredictionMap::IsIdenticalLane(
   if (curr_lane == nullptr || other_lane == nullptr) {
     return true;
   }
-  return id_string(other_lane) == id_string(curr_lane);
+  return other_lane->id().id() == curr_lane->id().id();
 }
 
 bool PredictionMap::IsIdenticalLane(
@@ -384,17 +381,13 @@ bool PredictionMap::IsIdenticalLane(
   return false;
 }
 
-int PredictionMap::LaneTurnType(const Id& id) {
-  std::shared_ptr<const LaneInfo> lane = LaneById(id);
+int PredictionMap::LaneTurnType(const std::string& lane_id) {
+  std::shared_ptr<const LaneInfo> lane = LaneById(lane_id);
   if (lane != nullptr) {
     return static_cast<int>(lane->lane().turn());
   }
   return 1;
 }
 
-int PredictionMap::LaneTurnType(const std::string& lane_id) {
-  return LaneTurnType(apollo::hdmap::MakeMapId(lane_id));
-}
-
 }  // namespace prediction
 }  // namespace apollo
diff --git a/modules/prediction/common/prediction_map.h b/modules/prediction/common/prediction_map.h
index db4caf49ff5fd53395e39792751956528db8dc09..1b8c56923b7e25f51a689c88ee5194ec0fc46431 100644
--- a/modules/prediction/common/prediction_map.h
+++ b/modules/prediction/common/prediction_map.h
@@ -63,21 +63,13 @@ class PredictionMap {
       std::shared_ptr<const apollo::hdmap::LaneInfo> lane_info,
       const double s);
 
-  /**
-   * @brief Get a shared pointer to a lane by lane ID.
-   * @param id The ID of the target lane ID.
-   * @return A shared pointer to the lane with the input lane ID.
-   */
-  std::shared_ptr<const apollo::hdmap::LaneInfo> LaneById(
-      const apollo::hdmap::Id& id);
-
   /**
    * @brief Get a shared pointer to a lane by lane ID.
    * @param id The ID of the target lane ID in the form of string.
    * @return A shared pointer to the lane with the input lane ID.
    */
   std::shared_ptr<const apollo::hdmap::LaneInfo> LaneById(
-      const std::string& str_id);
+      const std::string& id);
 
   /**
    * @brief Get the frenet coordinates (s, l) on a lane by a position.
@@ -139,7 +131,7 @@ class PredictionMap {
    * @return If the process is successful. 0: success, -1: failure.
    */
   int SmoothPointFromLane(
-      const apollo::hdmap::Id& id, const double s,
+      const std::string& id, const double s,
       const double l, Eigen::Vector2d* point,
       double* heading);
 
@@ -259,13 +251,6 @@ class PredictionMap {
       std::shared_ptr<const apollo::hdmap::LaneInfo> other_lane,
       const std::vector<std::shared_ptr<const apollo::hdmap::LaneInfo>>& lanes);
 
-  /**
-   * @brief Get lane turn type.
-   * @param id The lane ID.
-   * @return Integer corresponding to the lane turn type.
-   */
-  int LaneTurnType(const apollo::hdmap::Id& id);
-
   /**
    * @brief Get lane turn type.
    * @param lane_id The lane ID.
@@ -273,16 +258,6 @@ class PredictionMap {
    */
   int LaneTurnType(const std::string& lane_id);
 
-  /**
-   * @brief Get the ID in the form of string.
-   * @param info Map information.
-   * @return String of ID.
-   */
-  template <class MapInfo>
-  static std::string id_string(std::shared_ptr<const MapInfo> info) {
-    return info->id().id();
-  }
-
  private:
   DECLARE_SINGLETON(PredictionMap);
 };
diff --git a/modules/prediction/common/prediction_map_test.cc b/modules/prediction/common/prediction_map_test.cc
index 212bc60fabebc08271d7ae8fec915ac384295790..7b64cf3e413266890d7c1637789f3a056c4f8714 100644
--- a/modules/prediction/common/prediction_map_test.cc
+++ b/modules/prediction/common/prediction_map_test.cc
@@ -159,8 +159,7 @@ TEST_F(PredictionMapTest, get_path_heading) {
 }
 
 TEST_F(PredictionMapTest, get_smooth_point_from_lane) {
-  Id id;
-  id.set_id("l20");
+  const std::string id = "l20";
   double s = 10.0;
   double l = 0.0;
   double heading = M_PI;
diff --git a/modules/prediction/common/road_graph.cc b/modules/prediction/common/road_graph.cc
index a5042dce9b6fdc228af85f0a834ec5cf786af5f5..23a3ae65a8abcf8e565997c036ac518ed8bf1712 100644
--- a/modules/prediction/common/road_graph.cc
+++ b/modules/prediction/common/road_graph.cc
@@ -71,7 +71,7 @@ void RoadGraph::ComputeLaneSequence(
   LaneSegment lane_segment;
   lane_segment.set_lane_id(lane_info_ptr->id().id());
   lane_segment.set_start_s(start_s);
-  lane_segment.set_lane_turn_type(map->LaneTurnType(lane_info_ptr->id()));
+  lane_segment.set_lane_turn_type(map->LaneTurnType(lane_info_ptr->id().id()));
   if (accumulated_s + lane_info_ptr->total_length() - start_s >= length_) {
     lane_segment.set_end_s(length_ - accumulated_s + start_s);
   } else {
@@ -90,8 +90,7 @@ void RoadGraph::ComputeLaneSequence(
     const double successor_accumulated_s =
         accumulated_s + lane_info_ptr->total_length() - start_s;
     for (const auto& successor_lane_id : lane_info_ptr->lane().successor_id()) {
-      std::shared_ptr<const LaneInfo> successor_lane =
-          map->LaneById(successor_lane_id);
+      auto successor_lane = map->LaneById(successor_lane_id.id());
       ComputeLaneSequence(successor_accumulated_s, 0.0, successor_lane,
                           lane_segments, lane_graph_ptr);
     }
diff --git a/modules/prediction/container/obstacles/obstacle.cc b/modules/prediction/container/obstacles/obstacle.cc
index 428d4227b13492cd5d33cbbf8217e395405a18c6..89290487666f8df7f8c5e290a2a215ed3fc7b6a7 100644
--- a/modules/prediction/container/obstacles/obstacle.cc
+++ b/modules/prediction/container/obstacles/obstacle.cc
@@ -772,7 +772,7 @@ void Obstacle::SetCurrentLanes(Feature* feature) {
   }
   double min_heading_diff = std::numeric_limits<double>::infinity();
   for (std::shared_ptr<const LaneInfo> current_lane : current_lanes) {
-    int turn_type = map->LaneTurnType(current_lane->id());
+    int turn_type = map->LaneTurnType(current_lane->id().id());
     std::string lane_id = current_lane->id().id();
     double s = 0.0;
     double l = 0.0;
@@ -843,7 +843,7 @@ void Obstacle::SetNearbyLanes(Feature* feature) {
     if (s < 0.0 || s >= nearby_lane->total_length()) {
       continue;
     }
-    int turn_type = map->LaneTurnType(nearby_lane->id());
+    int turn_type = map->LaneTurnType(nearby_lane->id().id());
     double heading = feature->theta();
     if (FLAGS_enable_kf_tracking) {
       heading = feature->t_velocity_heading();
diff --git a/modules/prediction/predictor/vehicle/lane_sequence_predictor.cc b/modules/prediction/predictor/vehicle/lane_sequence_predictor.cc
index 9fdcd10bdaff911494e7bbfc28cbb0660abc722a..08c7f60de180b393aaadb573e2131ed22959fe61 100644
--- a/modules/prediction/predictor/vehicle/lane_sequence_predictor.cc
+++ b/modules/prediction/predictor/vehicle/lane_sequence_predictor.cc
@@ -180,7 +180,7 @@ void LaneSequencePredictor::DrawLaneSequenceTrajectoryPoints(
   for (size_t i = 0; i < static_cast<size_t>(total_time / freq); ++i) {
     Eigen::Vector2d point;
     double theta = M_PI;
-    if (map->SmoothPointFromLane(apollo::hdmap::MakeMapId(lane_id),
+    if (map->SmoothPointFromLane(lane_id,
                                  lane_s, lane_l, &point, &theta) != 0) {
       AERROR << "Unable to get smooth point from lane [" << lane_id
              << "] with s [" << lane_s << "] and l [" << lane_l