diff --git a/apps/state/lib/state/vehicle.ex b/apps/state/lib/state/vehicle.ex
index 52d96fe0..345855a8 100644
--- a/apps/state/lib/state/vehicle.ex
+++ b/apps/state/lib/state/vehicle.ex
@@ -49,8 +49,7 @@ defmodule State.Vehicle do
   defp has_invalid_dir(vehicle) do
     not_shuttle = vehicle.route_id != nil and not String.contains?(vehicle.route_id, "Shuttle")
 
-    invalid_dir =
-      vehicle.direction_id == nil or vehicle.direction_id > 1 or vehicle.direction_id < 0
+    invalid_dir = vehicle.direction_id not in [0, 1]
 
     not_shuttle and invalid_dir
   end