diff --git a/src/document/paths.ts b/src/document/paths.ts
index 9ddd375d..1f77144e 100644
--- a/src/document/paths.ts
+++ b/src/document/paths.ts
@@ -11,6 +11,21 @@ export interface ScenePathPoint {
 }
 
 export type ScenePathCurveMode = "linear" | "catmullRom";
+export type ScenePathRoadEdgeKind = "curb" | "softShoulder" | "bank" | "ditch";
+export type ScenePathRoadEdgeSide = "left" | "right";
+
+export interface ScenePathRoadEdgeSettings {
+  enabled: boolean;
+  kind: ScenePathRoadEdgeKind;
+  width: number;
+  height: number;
+  materialId: string | null;
+}
+
+export interface ScenePathRoadEdgesSettings {
+  left: ScenePathRoadEdgeSettings;
+  right: ScenePathRoadEdgeSettings;
+}
 
 export interface ScenePathRoadSettings {
   enabled: boolean;
@@ -20,6 +35,7 @@ export interface ScenePathRoadSettings {
   heightOffset: number;
   terrainConform: boolean;
   materialId: string | null;
+  edges: ScenePathRoadEdgesSettings;
 }
 
 export interface ScenePath {
@@ -156,12 +172,28 @@ export const DEFAULT_SCENE_PATH_ROAD_FALLOFF = 0.5;
 export const DEFAULT_SCENE_PATH_ROAD_HEIGHT_OFFSET = 0.03;
 export const DEFAULT_SCENE_PATH_ROAD_TERRAIN_CONFORM = true;
 export const DEFAULT_SCENE_PATH_ROAD_MATERIAL_ID = null;
+export const SCENE_PATH_ROAD_EDGE_KINDS = [
+  "curb",
+  "softShoulder",
+  "bank",
+  "ditch"
+] as const satisfies readonly ScenePathRoadEdgeKind[];
+export const DEFAULT_SCENE_PATH_ROAD_EDGE_ENABLED = false;
+export const DEFAULT_SCENE_PATH_ROAD_EDGE_KIND: ScenePathRoadEdgeKind =
+  "softShoulder";
+export const DEFAULT_SCENE_PATH_ROAD_EDGE_WIDTH = 0.35;
+export const DEFAULT_SCENE_PATH_ROAD_EDGE_HEIGHT = 0.12;
+export const DEFAULT_SCENE_PATH_ROAD_EDGE_MATERIAL_ID = null;
 export const MIN_SCENE_PATH_ROAD_WIDTH = 0.1;
 export const MAX_SCENE_PATH_ROAD_WIDTH = 100;
 export const MIN_SCENE_PATH_ROAD_SHOULDER_WIDTH = 0;
 export const MAX_SCENE_PATH_ROAD_SHOULDER_WIDTH = 100;
 export const MIN_SCENE_PATH_ROAD_FALLOFF = 0;
 export const MAX_SCENE_PATH_ROAD_FALLOFF = 1;
+export const MIN_SCENE_PATH_ROAD_EDGE_WIDTH = 0.01;
+export const MAX_SCENE_PATH_ROAD_EDGE_WIDTH = 50;
+export const MIN_SCENE_PATH_ROAD_EDGE_HEIGHT = 0;
+export const MAX_SCENE_PATH_ROAD_EDGE_HEIGHT = 20;
 export const MIN_SCENE_PATH_SAMPLED_RESOLUTION = 1;
 export const MAX_SCENE_PATH_SAMPLED_RESOLUTION = 64;
 export const MIN_SCENE_PATH_POINT_COUNT = 2;