diff --git a/examples/transportation/segment/road/road-indoors.yaml b/examples/transportation/segment/road/road-indoors.yaml
new file mode 100644
index 00000000..f3b7522b
--- /dev/null
+++ b/examples/transportation/segment/road/road-indoors.yaml
@@ -0,0 +1,17 @@
+---
+id: overture:transportation:segment:example:indoors
+type: Feature
+geometry:
+  type: LineString
+  coordinates: [[0, 0], [1, 1]]
+properties:
+  # Overture properties
+  theme: transportation
+  type: segment
+  version: 1
+  subtype: road
+  class: tertiary
+  road_surface:
+    - value: unknown
+  road_flags:
+    - values: [is_indoors]
diff --git a/schema/transportation/segment.yaml b/schema/transportation/segment.yaml
index c04785c9..ad5ca34c 100644
--- a/schema/transportation/segment.yaml
+++ b/schema/transportation/segment.yaml
@@ -217,6 +217,7 @@ properties:
         - is_under_construction
         - is_abandoned
         - is_covered
+        - is_indoors
     roadSurface:
       description: Physical surface of the road
       type: string