diff --git a/apps/edr-freight-web/backoffice/src/components/trainScheduling/IntercityRideAlongPanel.tsx b/apps/edr-freight-web/backoffice/src/components/trainScheduling/IntercityRideAlongPanel.tsx
index 275e2d9c9..e4512e42a 100644
--- a/apps/edr-freight-web/backoffice/src/components/trainScheduling/IntercityRideAlongPanel.tsx
+++ b/apps/edr-freight-web/backoffice/src/components/trainScheduling/IntercityRideAlongPanel.tsx
@@ -29,7 +29,10 @@ const parseError = (error: unknown, fallback: string) => {
   return message || (error as Error)?.message || fallback;
 };
 
-function fmt(n: number): string {
+// A capacity axis can be null when the schedule's locomotive has no limit
+// configured for it — render "—" instead of crashing on toFixed.
+function fmt(n: number | null | undefined): string {
+  if (n == null) return "—";
   return Number.isInteger(n) ? String(n) : n.toFixed(1);
 }
 
@@ -43,13 +46,22 @@ function CapacityBadges({ capacity }: { capacity: IntercityCapacity | null }) {
   }
   return (
     <Group gap="xs">
-      <Badge variant="light" color={capacity.wagons > 0 ? "teal" : "red"}>
+      <Badge
+        variant="light"
+        color={capacity.wagons == null ? "gray" : capacity.wagons > 0 ? "teal" : "red"}
+      >
         {fmt(capacity.wagons)} wagons free
       </Badge>
-      <Badge variant="light" color={capacity.weightTons > 0 ? "teal" : "red"}>
+      <Badge
+        variant="light"
+        color={capacity.weightTons == null ? "gray" : capacity.weightTons > 0 ? "teal" : "red"}
+      >
         {fmt(capacity.weightTons)} t free
       </Badge>
-      <Badge variant="light" color={capacity.lengthMeters > 0 ? "teal" : "red"}>
+      <Badge
+        variant="light"
+        color={capacity.lengthMeters == null ? "gray" : capacity.lengthMeters > 0 ? "teal" : "red"}
+      >
         {fmt(capacity.lengthMeters)} m free
       </Badge>
     </Group>
diff --git a/apps/edr-freight-web/backoffice/src/types/trainScheduling.ts b/apps/edr-freight-web/backoffice/src/types/trainScheduling.ts
index 97f14f1d8..99cc613a1 100644
--- a/apps/edr-freight-web/backoffice/src/types/trainScheduling.ts
+++ b/apps/edr-freight-web/backoffice/src/types/trainScheduling.ts
@@ -879,9 +879,12 @@ export interface CompositionRemovalEntry {
 // the train's remaining wagon/weight/length capacity.
 
 export interface IntercityCapacity {
-  wagons: number;
-  weightTons: number;
-  lengthMeters: number;
+  // Each axis can be null when the schedule's train/locomotive has no limit
+  // configured for it (e.g. no max length on the loco) — the API passes the
+  // gap through rather than inventing a number.
+  wagons: number | null;
+  weightTons: number | null;
+  lengthMeters: number | null;
 }
 
 export interface IntercityBookingRow {