diff --git a/src/main/java/com/wayble/server/ServerApplication.java b/src/main/java/com/wayble/server/ServerApplication.java
index 2729f1c1..9cb92d1f 100644
--- a/src/main/java/com/wayble/server/ServerApplication.java
+++ b/src/main/java/com/wayble/server/ServerApplication.java
@@ -1,6 +1,7 @@
 package com.wayble.server;
 
 import com.wayble.server.common.client.tmap.TMapProperties;
+import com.wayble.server.direction.external.kric.KricProperties;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.autoconfigure.data.elasticsearch.ReactiveElasticsearchRepositoriesAutoConfiguration;
@@ -15,10 +16,8 @@
 )
 @EnableJpaAuditing
 @EnableScheduling
-@EnableElasticsearchRepositories(basePackages = {
-		"com.wayble.server.explore.repository", "com.wayble.server.direction.repository", "com.wayble.server.logging.repository"
-})
-@EnableConfigurationProperties(TMapProperties.class)
+@EnableConfigurationProperties({TMapProperties.class, KricProperties.class})
+@EnableElasticsearchRepositories(basePackages = {"com.wayble.server.explore.repository", "com.wayble.server.logging.repository"})
 @EntityScan(basePackages = "com.wayble.server")
 public class ServerApplication {
 
diff --git a/src/main/java/com/wayble/server/common/config/RestTemplateConfig.java b/src/main/java/com/wayble/server/common/config/RestTemplateConfig.java
deleted file mode 100644
index ec2795b2..00000000
--- a/src/main/java/com/wayble/server/common/config/RestTemplateConfig.java
+++ /dev/null
@@ -1,14 +0,0 @@
-package com.wayble.server.common.config;
-
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
-import org.springframework.web.client.RestTemplate;
-
-@Configuration
-public class RestTemplateConfig {
-    
-    @Bean
-    public RestTemplate restTemplate() {
-        return new RestTemplate();
-    }
-}
\ No newline at end of file
diff --git a/src/main/java/com/wayble/server/common/config/SecurityConfig.java b/src/main/java/com/wayble/server/common/config/SecurityConfig.java
index 3ec980f2..2c96a974 100644
--- a/src/main/java/com/wayble/server/common/config/SecurityConfig.java
+++ b/src/main/java/com/wayble/server/common/config/SecurityConfig.java
@@ -45,7 +45,6 @@ public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Excepti
                                 "/api/v1/users/reissue",
                                 "/api/v1/users/logout",
                                 "/api/v1/auth/**",
-                                "/api/v1/directions/**",
                                 "/swagger-ui/**",
                                 "/v3/api-docs/**",
                                 "/",
diff --git a/src/main/java/com/wayble/server/common/config/WebClientConfig.java b/src/main/java/com/wayble/server/common/config/WebClientConfig.java
index db69178a..8a8d4380 100644
--- a/src/main/java/com/wayble/server/common/config/WebClientConfig.java
+++ b/src/main/java/com/wayble/server/common/config/WebClientConfig.java
@@ -1,6 +1,7 @@
 package com.wayble.server.common.config;
 
 import com.wayble.server.common.client.tmap.TMapProperties;
+import com.wayble.server.direction.external.kric.KricProperties;
 import lombok.RequiredArgsConstructor;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -11,6 +12,7 @@
 public class WebClientConfig {
 
     private final TMapProperties tMapProperties;
+    private final KricProperties kricProperties;
 
     @Bean
     public WebClient webClient() {
@@ -24,4 +26,11 @@ public WebClient tMapWebClient() {
                 .baseUrl(tMapProperties.baseUrl())
                 .build();
     }
+
+    @Bean
+    public WebClient kricWebClient() {
+        return WebClient.builder()
+                .baseUrl(kricProperties.baseUrl())
+                .build();
+    }
 }
diff --git a/src/main/java/com/wayble/server/direction/controller/TransportationController.java b/src/main/java/com/wayble/server/direction/controller/TransportationController.java
index 97d662fb..d7a3f58c 100644
--- a/src/main/java/com/wayble/server/direction/controller/TransportationController.java
+++ b/src/main/java/com/wayble/server/direction/controller/TransportationController.java
@@ -10,7 +10,7 @@
 import io.swagger.v3.oas.annotations.responses.ApiResponse;
 import io.swagger.v3.oas.annotations.tags.Tag;
 import lombok.RequiredArgsConstructor;
-import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
@@ -51,8 +51,8 @@ public class TransportationController {
                     )
             }
     )
-    @GetMapping("/")
-    public CommonResponse<TransportationResponseDto> getDirections(
+    @PostMapping("/")
+    public CommonResponse<TransportationResponseDto> findDirections(
             @RequestBody TransportationRequestDto request
     ){
         TransportationResponseDto data = transportationService.findRoutes(request);
diff --git a/src/main/java/com/wayble/server/direction/dto/TransportationResponseDto.java b/src/main/java/com/wayble/server/direction/dto/TransportationResponseDto.java
index 02518eac..44255d4f 100644
--- a/src/main/java/com/wayble/server/direction/dto/TransportationResponseDto.java
+++ b/src/main/java/com/wayble/server/direction/dto/TransportationResponseDto.java
@@ -1,10 +1,9 @@
 package com.wayble.server.direction.dto;
 
 import com.wayble.server.direction.entity.DirectionType;
-import io.micrometer.common.lang.Nullable;
+import org.springframework.lang.Nullable;
 import io.swagger.v3.oas.annotations.media.Schema;
 
-import java.time.ZonedDateTime;
 import java.util.List;
 
 @Schema(description = "대중교통 길찾기 응답 DTO")
@@ -14,8 +13,8 @@ public record TransportationResponseDto(
 ) {
     public record Step(
             DirectionType mode, // 예: START, WALK, SUBWAY, BUS, FINISH
-            String routeName,// mode에 따라 null일 수 있음
-            NodeInfo information, // mode에 따라 null일 수 있음
+            @Nullable String routeName,
+            @Nullable NodeInfo information,
             String from,
             String to
     ) {}
@@ -33,6 +32,6 @@ public record NodeInfo(
 
     public record LocationInfo(
             Double latitude,
-            Double Longtitude
+            Double Longitude
     ) {}
 }
diff --git a/src/main/java/com/wayble/server/direction/entity/transportation/Edge.java b/src/main/java/com/wayble/server/direction/entity/transportation/Edge.java
index c9ca1b23..952d30d9 100644
--- a/src/main/java/com/wayble/server/direction/entity/transportation/Edge.java
+++ b/src/main/java/com/wayble/server/direction/entity/transportation/Edge.java
@@ -7,7 +7,7 @@
 
 @Entity
 @Getter
-@Builder(access = AccessLevel.PUBLIC)
+@Builder(access = AccessLevel.PRIVATE)
 @AllArgsConstructor(access = AccessLevel.PROTECTED)
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 @Table(name = "edge")
@@ -34,4 +34,14 @@ public class Edge {
     @ManyToOne
     @JoinColumn(name = "route_id")
     private Route route;
+
+    public static Edge createEdge(Long id, Node startNode, Node endNode, DirectionType edgeType) {
+        return Edge.builder()
+                .id(id)
+                .edgeType(edgeType)
+                .startNode(startNode)
+                .endNode(endNode)
+                .route(null)
+                .build();
+    }
 }
diff --git a/src/main/java/com/wayble/server/direction/entity/transportation/Node.java b/src/main/java/com/wayble/server/direction/entity/transportation/Node.java
index 9136df34..3b5029a6 100644
--- a/src/main/java/com/wayble/server/direction/entity/transportation/Node.java
+++ b/src/main/java/com/wayble/server/direction/entity/transportation/Node.java
@@ -49,9 +49,10 @@ public class Node {
     @OneToOne(mappedBy = "node")
     private Facility facility_id;
 
-    public Node(Long id, String stationName, double latitude, double longitude) {
+    public Node(Long id, String stationName, DirectionType nodeType, double latitude, double longitude) {
         this.id = id;
         this.stationName = stationName;
+        this.nodeType = nodeType;
         this.latitude = latitude;
         this.longitude = longitude;
     }
diff --git a/src/main/java/com/wayble/server/direction/exception/DirectionErrorCase.java b/src/main/java/com/wayble/server/direction/exception/DirectionErrorCase.java
index bd5bdd2f..e7289c69 100644
--- a/src/main/java/com/wayble/server/direction/exception/DirectionErrorCase.java
+++ b/src/main/java/com/wayble/server/direction/exception/DirectionErrorCase.java
@@ -11,7 +11,8 @@ public enum DirectionErrorCase implements ErrorCase {
     PATH_NOT_FOUND(400, 4001, "해당하는 경로를 찾을 수 없습니다."),
     ES_INDEXING_FAILED(500, 4002, "ElasticSearch 인덱싱에 실패했습니다."),
     HISTORY_NOT_FOUND(400, 4004, "검색 기록이 없습니다."),
-    ;
+    DISTANCE_TOO_FAR(400, 4002, "거리가 30km 이상입니다."),
+    PATH_NOT_FOUND(400, 4001, "해당하는 경로를 찾을 수 없습니다.");
 
     private final Integer httpStatusCode;
     private final Integer errorCode;
diff --git a/src/main/java/com/wayble/server/direction/external/kric/KricProperties.java b/src/main/java/com/wayble/server/direction/external/kric/KricProperties.java
new file mode 100644
index 00000000..f716f287
--- /dev/null
+++ b/src/main/java/com/wayble/server/direction/external/kric/KricProperties.java
@@ -0,0 +1,10 @@
+package com.wayble.server.direction.external.kric;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+
+@ConfigurationProperties(prefix = "kric.api")
+public record KricProperties(
+        String key,
+        String baseUrl
+) {
+}
\ No newline at end of file
diff --git a/src/main/java/com/wayble/server/direction/dto/toilet/KricToiletRawBody.java b/src/main/java/com/wayble/server/direction/external/kric/dto/KricToiletRawBody.java
similarity index 64%
rename from src/main/java/com/wayble/server/direction/dto/toilet/KricToiletRawBody.java
rename to src/main/java/com/wayble/server/direction/external/kric/dto/KricToiletRawBody.java
index 2557887c..3af1db3f 100644
--- a/src/main/java/com/wayble/server/direction/dto/toilet/KricToiletRawBody.java
+++ b/src/main/java/com/wayble/server/direction/external/kric/dto/KricToiletRawBody.java
@@ -1,4 +1,4 @@
-package com.wayble.server.direction.dto.toilet;
+package com.wayble.server.direction.external.kric.dto;
 
 import java.util.List;
 
diff --git a/src/main/java/com/wayble/server/direction/dto/toilet/KricToiletRawItem.java b/src/main/java/com/wayble/server/direction/external/kric/dto/KricToiletRawItem.java
similarity index 66%
rename from src/main/java/com/wayble/server/direction/dto/toilet/KricToiletRawItem.java
rename to src/main/java/com/wayble/server/direction/external/kric/dto/KricToiletRawItem.java
index 77e5407d..ddd6f918 100644
--- a/src/main/java/com/wayble/server/direction/dto/toilet/KricToiletRawItem.java
+++ b/src/main/java/com/wayble/server/direction/external/kric/dto/KricToiletRawItem.java
@@ -1,4 +1,4 @@
-package com.wayble.server.direction.dto.toilet;
+package com.wayble.server.direction.external.kric.dto;
 
 import lombok.Getter;
 
diff --git a/src/main/java/com/wayble/server/direction/dto/toilet/KricToiletRawResponse.java b/src/main/java/com/wayble/server/direction/external/kric/dto/KricToiletRawResponse.java
similarity index 63%
rename from src/main/java/com/wayble/server/direction/dto/toilet/KricToiletRawResponse.java
rename to src/main/java/com/wayble/server/direction/external/kric/dto/KricToiletRawResponse.java
index 3fd3d6dd..b0b3faac 100644
--- a/src/main/java/com/wayble/server/direction/dto/toilet/KricToiletRawResponse.java
+++ b/src/main/java/com/wayble/server/direction/external/kric/dto/KricToiletRawResponse.java
@@ -1,4 +1,4 @@
-package com.wayble.server.direction.dto.toilet;
+package com.wayble.server.direction.external.kric.dto;
 
 import java.util.List;
 
diff --git a/src/main/java/com/wayble/server/direction/repository/FacilityRepository.java b/src/main/java/com/wayble/server/direction/repository/FacilityRepository.java
index ebee3aa2..7fe4a12d 100644
--- a/src/main/java/com/wayble/server/direction/repository/FacilityRepository.java
+++ b/src/main/java/com/wayble/server/direction/repository/FacilityRepository.java
@@ -1,9 +1,12 @@
 package com.wayble.server.direction.repository;
 
 import com.wayble.server.direction.entity.transportation.Facility;
-import org.springframework.data.jpa.repository.JpaRepository;
 
-public interface FacilityRepository extends JpaRepository<Facility, Long> {
+import java.util.List;
+import java.util.Optional;
 
+import org.springframework.data.jpa.repository.JpaRepository;
 
+public interface FacilityRepository extends JpaRepository<Facility, Long> {
+    Optional<Facility> findByNodeId(Long nodeId);
 }
diff --git a/src/main/java/com/wayble/server/direction/service/EdgeService.java b/src/main/java/com/wayble/server/direction/service/EdgeService.java
deleted file mode 100644
index 1421555a..00000000
--- a/src/main/java/com/wayble/server/direction/service/EdgeService.java
+++ /dev/null
@@ -1,21 +0,0 @@
-package com.wayble.server.direction.service;
-
-import com.wayble.server.direction.entity.DirectionType;
-import com.wayble.server.direction.entity.transportation.*;
-import org.springframework.stereotype.Service;
-
-@Service
-public class EdgeService {
-    public Edge createEdge(Long id, Node startNode, Node endNode, DirectionType edgeType) {
-
-        Edge edge = Edge.builder()
-                .id(id)
-                .edgeType(edgeType)
-                .startNode(startNode)
-                .endNode(endNode)
-                .route(null)
-                .build();
-
-        return edge;
-    }
-}
diff --git a/src/main/java/com/wayble/server/direction/service/FacilityService.java b/src/main/java/com/wayble/server/direction/service/FacilityService.java
index a43e6ec9..834f7907 100644
--- a/src/main/java/com/wayble/server/direction/service/FacilityService.java
+++ b/src/main/java/com/wayble/server/direction/service/FacilityService.java
@@ -1,18 +1,17 @@
 package com.wayble.server.direction.service;
 
 import com.wayble.server.direction.dto.TransportationResponseDto;
-import com.wayble.server.direction.dto.toilet.KricToiletRawItem;
-import com.wayble.server.direction.dto.toilet.KricToiletRawResponse;
 import com.wayble.server.direction.entity.transportation.Facility;
+import com.wayble.server.direction.external.kric.dto.KricToiletRawItem;
+import com.wayble.server.direction.external.kric.dto.KricToiletRawResponse;
 import com.wayble.server.direction.repository.FacilityRepository;
 import lombok.RequiredArgsConstructor;
-import org.springframework.beans.factory.annotation.Value;
-import org.springframework.core.ParameterizedTypeReference;
-import org.springframework.http.HttpMethod;
-import org.springframework.http.ResponseEntity;
+import lombok.extern.slf4j.Slf4j;
+
 import org.springframework.stereotype.Service;
-import org.springframework.web.client.RestTemplate;
+import org.springframework.web.reactive.function.client.WebClient;
 import org.springframework.web.util.UriComponentsBuilder;
+import com.wayble.server.direction.external.kric.KricProperties;
 
 import java.util.ArrayList;
 import java.util.HashMap;
@@ -20,17 +19,17 @@
 import java.util.Map;
 import java.util.stream.Collectors;
 
+
 @Service
+@Slf4j
 @RequiredArgsConstructor
 public class FacilityService {
     private final FacilityRepository facilityRepository;
-    private final RestTemplate restTemplate;
+    private final WebClient kricWebClient;
+    private final KricProperties kricProperties;
 
-    @Value("${kric.api.key}")
-    private String kricApiKey;
-
-    public TransportationResponseDto.NodeInfo getNodeInfo(Long NodeId){
-        Facility facility = facilityRepository.findById(NodeId).orElse(null);
+    public TransportationResponseDto.NodeInfo getNodeInfo(Long nodeId){
+        Facility facility = facilityRepository.findByNodeId(nodeId).orElse(null);
         List<TransportationResponseDto.LocationInfo> wheelchair = new ArrayList<>();
         List<TransportationResponseDto.LocationInfo> elevator = new ArrayList<>();
         Boolean accessibleRestroom = false;
@@ -68,21 +67,29 @@ public TransportationResponseDto.NodeInfo getNodeInfo(Long NodeId){
     }
 
     private Map<String, Boolean> getToiletInfo(Facility facility){
-        String url = UriComponentsBuilder.fromHttpUrl("https://data.kric.go.kr/api/vulnerableUserInfo/stationDisabledToilet")
-                .queryParam("serviceKey", kricApiKey)
+        String uri = UriComponentsBuilder.fromPath("/api/vulnerableUserInfo/stationDisabledToilet")
+                .queryParam("serviceKey", kricProperties.key())
                 .queryParam("format", "json")
-                .queryParam("railOprIsttCd", facility.getRailOprLsttCd())
+                .queryParam("railOprLsttCd", facility.getRailOprLsttCd())
                 .queryParam("lnCd", facility.getLnCd())
                 .queryParam("stinCd", facility.getStinCd())
                 .toUriString();
-        ResponseEntity<KricToiletRawResponse> response = restTemplate.exchange(
-                url,
-                HttpMethod.GET,
-                null,
-                new ParameterizedTypeReference<KricToiletRawResponse>() {}
-        );
+        
+        List<KricToiletRawItem> items;
+        try{
+            KricToiletRawResponse response = kricWebClient
+                    .get()
+                    .uri(uri)
+                    .retrieve()
+                    .bodyToMono(KricToiletRawResponse.class)
+                    .block();
 
-        List<KricToiletRawItem> items = response.getBody().body().item();
+            items = response.body().item();
+
+        } catch(Exception e){
+            log.info("역사 화장실 api 호출 중 에러 발생: {}: {}", uri, e.getCause());
+            return new HashMap<>();
+        }
 
         // 역별로 화장실 존재 여부 추출 (중복 제거)
         Map<String, Boolean> stationToiletMap = new HashMap<>();
@@ -91,7 +98,9 @@ private Map<String, Boolean> getToiletInfo(Facility facility){
             int toiletCount = 0;
             try {
                 toiletCount = Integer.parseInt(item.toltNum());
-            } catch (NumberFormatException ignored) {}
+            } catch (NumberFormatException e) {
+                log.warn("지하철 역 토이렛 개수 파싱 실패. 지하철역 번호 {}: {}", stinCd, item.toltNum(), e);
+            }
             stationToiletMap.put(stinCd, stationToiletMap.getOrDefault(stinCd, false) || toiletCount > 0);
         }
 
diff --git a/src/main/java/com/wayble/server/direction/service/TransportationService.java b/src/main/java/com/wayble/server/direction/service/TransportationService.java
index 205f5696..fa19da79 100644
--- a/src/main/java/com/wayble/server/direction/service/TransportationService.java
+++ b/src/main/java/com/wayble/server/direction/service/TransportationService.java
@@ -13,31 +13,43 @@
 import org.springframework.stereotype.Service;
 
 import java.util.*;
-import java.util.Objects;
 
 import static com.wayble.server.direction.exception.DirectionErrorCase.PATH_NOT_FOUND;
+import static com.wayble.server.direction.exception.DirectionErrorCase.DISTANCE_TOO_FAR;
+import lombok.extern.slf4j.Slf4j;
 
-
+@Slf4j
 @Service
 @RequiredArgsConstructor
 public class TransportationService {
     private final NodeRepository nodeRepository;
     private final EdgeRepository edgeRepository;
-    private final EdgeService edgeService;
     private final FacilityService facilityService;
 
     private List<Node> nodes;
     private List<Edge> edges;
 
+    private static final int TRANSFER_PENALTY = 2000;
+    private static final int STEP_PENALTY = 500;
+    private static final int METER_CONVERSION = 1000;
+    private static final double DISTANCE_CONSTRAINT = 30;
+
     public TransportationResponseDto findRoutes(TransportationRequestDto request){
 
         TransportationRequestDto.Location origin = request.origin();
         TransportationRequestDto.Location destination = request.destination();
 
-        Node start = new Node(-1L, origin.name(), origin.latitude(), origin.longitude());
-        Node end = new Node(-2L, destination.name(), destination.latitude(), destination.longitude());
+        // 거리 검증 (30km 제한)
+        double distance = haversine(origin.latitude(), origin.longitude(), 
+                                  destination.latitude(), destination.longitude());
+        if (distance >= DISTANCE_CONSTRAINT) {
+            throw new ApplicationException(DISTANCE_TOO_FAR);
+        }
+
+        Node start = new Node(-1L, origin.name(), DirectionType.FROM_WAYPOINT ,origin.latitude(), origin.longitude());
+        Node end = new Node(-2L, destination.name(), DirectionType.TO_WAYPOINT,destination.latitude(), destination.longitude());
 
-        List<TransportationResponseDto.Step> steps = returnDijstra(start, end);
+        List<TransportationResponseDto.Step> steps = returnDijkstra(start, end);
 
 
         int startIndex = (request.cursor() != null) ? request.cursor() : 0;
@@ -56,7 +68,7 @@ public TransportationResponseDto findRoutes(TransportationRequestDto request){
     }
 
 
-    private List<TransportationResponseDto.Step> returnDijstra(Node startTmp, Node endTmp){
+    private List<TransportationResponseDto.Step> returnDijkstra(Node startTmp, Node endTmp){
 
         // 실제 노드·엣지 조회 및 컬렉션 복제
         nodes = new ArrayList<>(nodeRepository.findAll());
@@ -85,11 +97,11 @@ private List<TransportationResponseDto.Step> returnDijstra(Node startTmp, Node e
         Map<Pair<Long,Long>, Integer> weightMap = new HashMap<>();
 
         // 출발지 -> 가장 가까운 정류장 (도보)
-        Edge startToStation = edgeService.createEdge(-1L, startTmp, nearestToStart, DirectionType.WALK);
+        Edge startToStation = Edge.createEdge(-1L, startTmp, nearestToStart, DirectionType.WALK);
         edges.add(startToStation);
 
         // 가장 가까운 정류장 -> 도착지 (도보)
-        Edge stationToEnd = edgeService.createEdge(-2L, nearestToEnd, endTmp, DirectionType.WALK);
+        Edge stationToEnd = Edge.createEdge(-2L, nearestToEnd, endTmp, DirectionType.WALK);
         edges.add(stationToEnd);
 
         // 모든 엣지의 가중치 계산
@@ -106,19 +118,19 @@ private List<TransportationResponseDto.Step> returnDijstra(Node startTmp, Node e
             int weight = (int)(haversine(
                     from.getLatitude(), from.getLongitude(),
                     to.getLatitude(), to.getLongitude()
-            ) * 1000);
+            ) * METER_CONVERSION);
 
             weightMap.put(Pair.of(from.getId(), to.getId()), weight);
         }
 
         // 그래프 빌드 및 Dijkstra 호출
         Map<Long, List<Edge>> graph = buildGraph(nodes, edges);
-        List<TransportationResponseDto.Step> result = runDijstra(graph, startTmp, endTmp, weightMap);
+        List<TransportationResponseDto.Step> result = runDijkstra(graph, startTmp, endTmp, weightMap);
 
         return result;
     }
 
-    private List<TransportationResponseDto.Step> runDijstra(
+    private List<TransportationResponseDto.Step> runDijkstra(
             Map<Long, List<Edge>> graph, Node start, Node end,
             Map<Pair<Long, Long>, Integer> weightMap
     ){
@@ -167,7 +179,7 @@ private List<TransportationResponseDto.Step> runDijstra(
                         (int)(haversine(
                                 edge.getStartNode().getLatitude(), edge.getStartNode().getLongitude(),
                                 edge.getEndNode().getLatitude(), edge.getEndNode().getLongitude()
-                        ) * 1000)
+                        ) * METER_CONVERSION)
                 );
 
                 // 간단한 경로 선호를 위한 가중치 조정
@@ -179,11 +191,11 @@ private List<TransportationResponseDto.Step> runDijstra(
                         prevEdgeForCurr.getEdgeType() != edge.getEdgeType() &&
                         prevEdgeForCurr.getEdgeType() != DirectionType.WALK &&
                         edge.getEdgeType() != DirectionType.WALK) {
-                    weight += 2000; // 환승 패널티 대폭 증가
+                    weight += TRANSFER_PENALTY; // 환승 패널티 대폭 증가
                 }
 
                 // 단계 수 패널티 (경로 단계가 많을수록 불이익)
-                weight += 500; // 각 단계마다 추가 비용 대폭 증가
+                weight += STEP_PENALTY; // 각 단계마다 추가 비용 대폭 증가
 
                 int alt = distance.get(curr.getId()) + weight;
                 if (alt < distance.get(neighbor.getId())) {
@@ -201,7 +213,7 @@ private List<TransportationResponseDto.Step> runDijstra(
         Set<Long> backtrackVisited = new HashSet<>();
 
         if (distance.get(end.getId()) == Integer.MAX_VALUE) {
-            System.out.println("⚠️ 경로를 찾을 수 없음: 도착지에 도달할 수 없음");
+            log.warn("경로를 찾을 수 없음: 도착지에 도달할 수 없음");
             return steps; // 빈 리스트 반환
         }
 
@@ -209,14 +221,12 @@ private List<TransportationResponseDto.Step> runDijstra(
         List<Edge> pathEdges = new ArrayList<>();
         while (current != null && !current.equals(start)) {
             if (backtrackVisited.contains(current.getId())) {
-                System.out.println("⚠️ 순환 감지: " + current.getStationName());
                 break;
             }
             backtrackVisited.add(current.getId());
 
             Edge edge = prevEdge.get(current.getId());
             if (edge == null) {
-                System.out.println("⚠️ 이전 엣지가 null: " + current.getStationName());
                 break;
             }
             pathEdges.add(0, edge);
@@ -247,8 +257,10 @@ private List<TransportationResponseDto.Step> mergeConsecutiveRoutes(List<Edge> p
 
             
             // 시작 노드
-            String fromName = (currentEdge.getStartNode() != null) ? currentEdge.getStartNode().getStationName() : "Unknown";
-            String toName = (currentEdge.getEndNode() != null) ? currentEdge.getEndNode().getStationName() : "Unknown";
+            String fromName = (currentEdge.getStartNode() != null && currentEdge.getStartNode().getStationName() != null) 
+                ? currentEdge.getStartNode().getStationName() : "Unknown";
+            String toName = (currentEdge.getEndNode() != null && currentEdge.getEndNode().getStationName() != null) 
+                ? currentEdge.getEndNode().getStationName() : "Unknown";
             
             // 도보인 경우 또는 연속된 같은 노선이 없는 경우 그대로 추가
             if (currentType == DirectionType.WALK || currentRouteName == null) {
@@ -304,7 +316,7 @@ private Map<Long, List<Edge>> buildGraph(List<Node> nodes, List<Edge> edges) {
             if (nodeId != null) {
                 graph.put(nodeId, new ArrayList<>());
             } else {
-                System.out.println("❗ ID가 null인 node 발견: " + node.getStationName());
+                log.warn("ID가 null인 node 발견: " + node.getStationName());
             }
         }
         for (Edge edge : edges) {