diff --git a/lib/models/environment.py b/lib/models/environment.py
index 8374cf7..ee86ece 100644
--- a/lib/models/environment.py
+++ b/lib/models/environment.py
@@ -5,7 +5,6 @@
 class Env(BaseModel, frozen=True):
     latitude: float = 0
     longitude: float = 0
-    rail_length: Optional[float] = 5.2
     elevation: Optional[int] = 1400
     atmospheric_model_type: Optional[str] = 'standard_atmosphere'
     atmospheric_model_file: Optional[str] = 'GFS'