diff --git a/app/package-lock.json b/app/package-lock.json
index 060f545..001b2e9 100644
--- a/app/package-lock.json
+++ b/app/package-lock.json
@@ -14,7 +14,7 @@
         "@nestjs/platform-express": "^10.0.0",
         "@nestjs/platform-socket.io": "^10.4.7",
         "@nestjs/websockets": "^10.4.7",
-        "common_logic": "file:../common_logic",
+        "interface": "file:../interface",
         "reflect-metadata": "^0.2.0",
         "rxjs": "^7.8.1"
       },
@@ -42,7 +42,7 @@
         "typescript": "^5.1.3"
       }
     },
-    "../common_logic": {
+    "../interface": {
       "version": "1.0.0",
       "license": "ISC",
       "devDependencies": {
@@ -3549,10 +3549,6 @@
         "node": ">= 6"
       }
     },
-    "node_modules/common_logic": {
-      "resolved": "../common_logic",
-      "link": true
-    },
     "node_modules/component-emitter": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/component-emitter/-/component-emitter-1.3.1.tgz",
@@ -5284,6 +5280,10 @@
         "node": ">=12.0.0"
       }
     },
+    "node_modules/interface": {
+      "resolved": "../interface",
+      "link": true
+    },
     "node_modules/ipaddr.js": {
       "version": "1.9.1",
       "resolved": "https://registry.npmjs.org/ipaddr.js/-/ipaddr.js-1.9.1.tgz",
diff --git a/app/package.json b/app/package.json
index 9e197fc..c4cc9fd 100644
--- a/app/package.json
+++ b/app/package.json
@@ -24,7 +24,7 @@
     "@nestjs/platform-express": "^10.0.0",
     "@nestjs/platform-socket.io": "^10.4.7",
     "@nestjs/websockets": "^10.4.7",
-    "common_logic": "file:../common_logic",
+    "interface": "file:../interface",
     "reflect-metadata": "^0.2.0",
     "rxjs": "^7.8.1"
   },
diff --git a/app/src/main.ts b/app/src/main.ts
index 19a5915..5589d5f 100644
--- a/app/src/main.ts
+++ b/app/src/main.ts
@@ -1,11 +1,9 @@
 import { NestFactory } from '@nestjs/core';
 import { AppModule } from './app.module';
-import { printMsg } from 'common_logic';
 
 async function bootstrap() {
   const app = await NestFactory.create(AppModule);
   const port = process.env.PORT ?? 3010;
   await app.listen(port);
-  printMsg(`App listening on port ${port}`);
 }
 bootstrap();
diff --git a/common_logic/index.ts b/common_logic/index.ts
deleted file mode 100644
index 863d561..0000000
--- a/common_logic/index.ts
+++ /dev/null
@@ -1,3 +0,0 @@
-export  function printMsg(msg: string){
-    console.log(msg);
-}
\ No newline at end of file
diff --git a/interface/constants/TrackType.ts b/interface/constants/TrackType.ts
new file mode 100644
index 0000000..4e68f01
--- /dev/null
+++ b/interface/constants/TrackType.ts
@@ -0,0 +1,4 @@
+export enum TrackType {
+    RAIL = "RAIL",
+    ROAD = "ROAD"
+};
diff --git a/interface/index.ts b/interface/index.ts
new file mode 100644
index 0000000..f4c0cdf
--- /dev/null
+++ b/interface/index.ts
@@ -0,0 +1 @@
+export * from "./constants/TrackType"
\ No newline at end of file
diff --git a/common_logic/package-lock.json b/interface/package-lock.json
similarity index 100%
rename from common_logic/package-lock.json
rename to interface/package-lock.json
diff --git a/common_logic/package.json b/interface/package.json
similarity index 93%
rename from common_logic/package.json
rename to interface/package.json
index 596ad86..0233457 100644
--- a/common_logic/package.json
+++ b/interface/package.json
@@ -1,5 +1,5 @@
 {
-  "name": "common_logic",
+  "name": "interface",
   "version": "1.0.0",
   "description": "A collection of common functions for the trains and roads project.",
   "main": "dist/index.js",
diff --git a/common_logic/tsconfig.json b/interface/tsconfig.json
similarity index 100%
rename from common_logic/tsconfig.json
rename to interface/tsconfig.json
diff --git a/web/package-lock.json b/web/package-lock.json
index f6dd53e..c572af6 100644
--- a/web/package-lock.json
+++ b/web/package-lock.json
@@ -16,7 +16,7 @@
         "@types/node": "^16.18.119",
         "@types/react": "^18.3.12",
         "@types/react-dom": "^18.3.1",
-        "common_logic": "file:../common_logic",
+        "interface": "file:../interface",
         "react": "^18.3.1",
         "react-dom": "^18.3.1",
         "react-scripts": "5.0.1",
@@ -26,7 +26,7 @@
         "web-vitals": "^2.1.4"
       }
     },
-    "../common_logic": {
+    "../interface": {
       "version": "1.0.0",
       "license": "ISC",
       "devDependencies": {
@@ -6142,10 +6142,6 @@
         "node": ">= 12"
       }
     },
-    "node_modules/common_logic": {
-      "resolved": "../common_logic",
-      "link": true
-    },
     "node_modules/common-tags": {
       "version": "1.8.2",
       "resolved": "https://registry.npmjs.org/common-tags/-/common-tags-1.8.2.tgz",
@@ -9667,6 +9663,10 @@
       "integrity": "sha512-JV/yugV2uzW5iMRSiZAyDtQd+nxtUnjeLt0acNdw98kKLrvuRVyB80tsREOE7yvGVgalhZ6RNXCmEHkUKBKxew==",
       "license": "ISC"
     },
+    "node_modules/interface": {
+      "resolved": "../interface",
+      "link": true
+    },
     "node_modules/internal-slot": {
       "version": "1.0.7",
       "resolved": "https://registry.npmjs.org/internal-slot/-/internal-slot-1.0.7.tgz",
diff --git a/web/package.json b/web/package.json
index a0d6d26..6a469ba 100644
--- a/web/package.json
+++ b/web/package.json
@@ -11,7 +11,7 @@
     "@types/node": "^16.18.119",
     "@types/react": "^18.3.12",
     "@types/react-dom": "^18.3.1",
-    "common_logic": "file:../common_logic",
+    "interface": "file:../interface",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
     "react-scripts": "5.0.1",