diff --git a/test_runner/random_test_runner/include/random_test_runner/lanelet_utils.hpp b/test_runner/random_test_runner/include/random_test_runner/lanelet_utils.hpp
index 5203d1068cd..e5de867a84a 100644
--- a/test_runner/random_test_runner/include/random_test_runner/lanelet_utils.hpp
+++ b/test_runner/random_test_runner/include/random_test_runner/lanelet_utils.hpp
@@ -51,19 +51,19 @@ class LaneletUtils
 
   double computeDistance(
     const traffic_simulator_msgs::msg::LaneletPose & p1,
-    const traffic_simulator_msgs::msg::LaneletPose & p2);
+    const traffic_simulator_msgs::msg::LaneletPose & p2) const;
   std::optional<traffic_simulator_msgs::msg::LaneletPose> getOppositeLaneLet(
     const traffic_simulator_msgs::msg::LaneletPose & pose);
   std::vector<LaneletPart> getLanesWithinDistance(
     const traffic_simulator_msgs::msg::LaneletPose & pose, double min_distance,
     double max_distance);
 
-  std::vector<int64_t> getLaneletIds();
+  std::vector<int64_t> getLaneletIds() const;
   geometry_msgs::msg::PoseStamped toMapPose(
-    const traffic_simulator_msgs::msg::LaneletPose & lanelet_pose, const bool fill_pitch);
+    const traffic_simulator_msgs::msg::LaneletPose & lanelet_pose, const bool fill_pitch) const;
   std::vector<int64_t> getRoute(int64_t from_lanelet_id, int64_t to_lanelet_id);
-  double getLaneletLength(int64_t lanelet_id);
-  bool isInLanelet(int64_t lanelet_id, double s);
+  double getLaneletLength(int64_t lanelet_id) const;
+  bool isInLanelet(int64_t lanelet_id, double s) const;
 
 private:
   lanelet::LaneletMapPtr lanelet_map_ptr_;
diff --git a/test_runner/random_test_runner/src/lanelet_utils.cpp b/test_runner/random_test_runner/src/lanelet_utils.cpp
index dd462c9ff00..e228a0e7bb9 100644
--- a/test_runner/random_test_runner/src/lanelet_utils.cpp
+++ b/test_runner/random_test_runner/src/lanelet_utils.cpp
@@ -47,10 +47,13 @@ LaneletUtils::LaneletUtils(const boost::filesystem::path & filename)
     std::make_shared<hdmap_utils::HdMapUtils>(filename, geographic_msgs::msg::GeoPoint());
 }
 
-std::vector<int64_t> LaneletUtils::getLaneletIds() { return hdmap_utils_ptr_->getLaneletIds(); }
+std::vector<int64_t> LaneletUtils::getLaneletIds() const
+{
+  return hdmap_utils_ptr_->getLaneletIds();
+}
 
 geometry_msgs::msg::PoseStamped LaneletUtils::toMapPose(
-  const traffic_simulator_msgs::msg::LaneletPose & lanelet_pose, const bool fill_pitch)
+  const traffic_simulator_msgs::msg::LaneletPose & lanelet_pose, const bool fill_pitch) const
 {
   return hdmap_utils_ptr_->toMapPose(lanelet_pose, fill_pitch);
 }
@@ -60,14 +63,14 @@ std::vector<int64_t> LaneletUtils::getRoute(int64_t from_lanelet_id, int64_t to_
   return hdmap_utils_ptr_->getRoute(from_lanelet_id, to_lanelet_id);
 }
 
-double LaneletUtils::getLaneletLength(int64_t lanelet_id)
+double LaneletUtils::getLaneletLength(int64_t lanelet_id) const
 {
   return hdmap_utils_ptr_->getLaneletLength(lanelet_id);
 }
 
 double LaneletUtils::computeDistance(
   const traffic_simulator_msgs::msg::LaneletPose & p1,
-  const traffic_simulator_msgs::msg::LaneletPose & p2)
+  const traffic_simulator_msgs::msg::LaneletPose & p2) const
 {
   auto p1_g = hdmap_utils_ptr_->toMapPose(p1).pose.position;
   auto p2_g = hdmap_utils_ptr_->toMapPose(p2).pose.position;
@@ -78,7 +81,7 @@ double LaneletUtils::computeDistance(
   return std::sqrt(d.x * d.x + d.y * d.y + d.z * d.z);
 }
 
-bool LaneletUtils::isInLanelet(int64_t lanelet_id, double s)
+bool LaneletUtils::isInLanelet(int64_t lanelet_id, double s) const
 {
   return hdmap_utils_ptr_->isInLanelet(lanelet_id, s);
 }