diff --git a/README.md b/README.md
index 2ebcc1d..30bb0c3 100644
--- a/README.md
+++ b/README.md
@@ -222,42 +222,53 @@ The matcher:
   matches still hit (e.g. `philbrick` finds `Philbrook`).
 - Ranks name matches above address matches above description matches.
 
-## Preferences & Units
+## Preferences
 
-Click **⚙ Preferences** in the top bar to choose the **unit system** — **Metric**
-or **Imperial**. The choice is saved to `localStorage`, so it persists across
-reloads and is shared by the Directions panel.
+Click **⚙ Preferences** in the top bar:
 
-Units are auto-selected within the chosen system: **m/ft under a kilometer/mile,
-otherwise km/mi** (e.g. `820 m`, `1.9 km`; `900 ft`, `1.2 mi`).
+- **Unit system** — **Metric** or **Imperial** (saved to `localStorage`). Units
+  are auto-selected within the chosen system: **m/ft under a kilometer/mile,
+  otherwise km/mi** (e.g. `820 m`, `1.9 km`; `900 ft`, `1.2 mi`).
+- **Saved Points** — **Export / Import** your browser-local saved points as a
+  JSON file (see below). Imported points are **merged** (deduplicated by id);
+  existing points are kept.
 
 ## Directions & Routing
 
-When a dump layer is present (it carries the routable graph), a **Directions**
-button appears in the top bar. Opening it lets you:
+The flow is: pick an **origin**, open **Directions**, pick a **destination**,
+then **Calculate**.
 
-- **Set start (A)** and **end (B)** by clicking the map.
-- **Avoid certain POI categories** along the route (schools, fire stations,
-  fuel stations, parking, restaurants, …).
-- **Compute** a route and **draw it** on the map.
-- Choose a **unit system** (Metric or Imperial; distances auto-switch between
-  m/ft and km/mi at the km/mile boundary), plus a **travel mode** (Drive or
-  Walk).
-- See the route's **distance** and an **estimated travel time** (computed from
-  the mode's average speed).
-- **Turn-by-turn directions** (*Head north*, *Turn right*, *Arrive at destination*,
-  …) are generated for **Drive** mode and listed beneath the result; a live
-  progress bar shows while the route computes.
-- **Robustness:** if A/B are far from the routable road network, or the destination
-  is disconnected / fully blocked by avoided categories, the app reports *why* and
-  still draws the **closest reachable** portion of a route (flagged as a partial
-  path) instead of failing silently.
+1. **Pick the origin (start point)** — select any POI from **search**, or click
+   directly on the map. (Clicking empty space creates a browser-local *Saved
+   Point* and uses it as the origin.)
+2. The **Directions** button in the top bar is enabled only when an origin is
+   selected.
+3. In the dialog, pick a **destination** — by clicking the map, **searching** a
+   POI (local or online via Nominatim), or choosing a **Saved Point**.
+4. **Calculate route** enables once both points are set. The computation runs in
+   a **Web Worker** (off the UI thread) with a live **progress bar**.
+5. On completion the panel shows the **turn-by-turn** directions (*Head north*,
+   *Turn right*, *Arrive at destination*, …) for **Drive** mode, plus distance,
+   estimated travel time, and the drawn route.
 
-Routing is done **entirely in the browser** (`src/lib/routing.ts`): an
-A*-search over the graph built from the OSM dump. Point A/B are snapped to the
-nearest graph node. When you enable a category to avoid, edges within a radius
-of POIs in that category are heavily penalized (or blocked) so the route routes
-around them.
+Other behaviors:
+
+- **Route options** (collapsed): **avoid certain POI categories** (schools, fire
+  stations, fuel stations, parking, restaurants, …) and choose the **travel
+  mode** (Drive / Walk).
+- **Robustness:** if the origin/destination are far from the routable road
+  network, or the destination is disconnected / fully blocked by avoided
+  categories, the app reports *why* and still draws the **closest reachable**
+  portion of a route (flagged as a partial path) instead of failing silently.
+- **On-demand layer loading:** if the road-data layer needed for routing isn't
+  loaded, the dialog prompts you to load it ("Road data layer needed for route
+  computation") rather than silently disabling.
+
+Routing is done **entirely in the browser** (`src/lib/routing.ts`, invoked from
+`src/lib/routing.worker.ts`): an A*-search over the graph built from the OSM
+dump. Points are snapped to the nearest graph node. When you enable a category
+to avoid, edges within a radius of POIs in that category are heavily penalized
+(or blocked) so the route routes around them.
 
 ```ts
 import { route } from '$lib/routing';
@@ -271,6 +282,17 @@ const r = route(graph, [latA, lonB], [latB, lonB], pois, [
 // r.turns (turn-by-turn steps for driving mode)
 ```
 
+## Saved Points (browser-local)
+
+Clicking an empty spot on the map creates a **Saved Point** — a location you
+want to remember. Saved points are stored only in your browser's `localStorage`
+and shown as a toggleable **"Saved Points"** layer in the legend, with a
+distinct purple pin. They can be used as route origins or destinations.
+
+Because they live only in the browser, **Export / Import** (in ⚙ Preferences)
+lets you back them up as a JSON file and restore them (merged, deduplicated by
+id).
+
 ## Deployment
 
 The `build/` directory is entirely static. Serve it directly:
diff --git a/scripts/test.mjs b/scripts/test.mjs
index 2a43998..3ce40cf 100644
--- a/scripts/test.mjs
+++ b/scripts/test.mjs
@@ -162,6 +162,52 @@ async function run() {
 	t.expect('claremore', 'claremore');
 	t.expectNone('zzzzqqqq');                                      // gibberish yields nothing
 
+	// 4. Routing: turn-by-turn generation + partial/robustness behavior.
+	{
+		const { buildTurnInstructions } = await import(resolve(__dirname, '..', 'src', 'lib', 'routing.ts'));
+		// Straight north, then a 90° right turn east.
+		const path = [];
+		for (let i = 0; i <= 10; i++) path.push([36.1 + i * 0.000017, -95.9]); // north
+		for (let i = 1; i <= 20; i++) path.push([36.10017, -95.9 + i * 0.000017]); // east
+		const turns = buildTurnInstructions(path);
+		check(turns.length >= 3, `buildTurnInstructions emits head + turn + arrive (got ${turns.length})`);
+		check(turns.some((t) => t.instruction.toLowerCase().includes('head')), 'has a "Head …" first step');
+		check(turns.some((t) => t.instruction.toLowerCase().includes('turn right')), 'has a "Turn right" maneuver for 90° turn');
+		check(turns[turns.length - 1].instruction === 'Arrive at destination', 'last step is "Arrive at destination"');
+
+		const { route } = await import(resolve(__dirname, '..', 'src', 'lib', 'routing.ts'));
+		// Disconnected destination -> partial path.
+		const g2 = {
+			meta: { nodeCount: 3, edgeCount: 1 },
+			coords: [[36.1, -95.9], [36.1005, -95.9], [36.2, -95.8]],
+			adj: [[[1, 55]], [[0, 55]], []]
+		};
+		const rp = route(g2, [36.1, -95.9], [36.2, -95.8]);
+		check(rp.found === false, 'disconnected destination -> found=false');
+		check(rp.partial === true, 'disconnected destination -> partial=true');
+		check(rp.path.length >= 2, 'partial path reaches the closest reachable node');
+		check(!!rp.reason, 'partial route has a human-readable reason');
+
+		// Empty graph -> clear "no road network" message, no crash.
+		const rg = route({ meta: { nodeCount: 0, edgeCount: 0 }, coords: [], adj: [] }, [36.1, -95.9], [36.2, -95.8]);
+		check(rg.found === false && !!rg.reason, 'empty graph -> found=false with reason');
+	}
+
+	// 5. Saved Points: import merge + dedupe by id.
+	{
+		const { addSavedPoint, clearSavedPoints, importSavedPoints, exportSavedPoints } =
+			await import(resolve(__dirname, '..', 'src', 'lib', 'savedPoints.ts'));
+		clearSavedPoints();
+		addSavedPoint({ lat: 1, lon: 2, label: 'A' });
+		const existing = JSON.parse(exportSavedPoints());
+		const newPoint = { id: 'B', lat: 5, lon: 6, label: 'B' };
+		const res = importSavedPoints(JSON.stringify({ type: 'navigator.savedPoints', version: 1, points: [...existing.points, newPoint] }));
+		check(res.added === 1 && res.skipped === 1, `import merges + dedupes by id (added=${res.added}, skipped=${res.skipped})`);
+		try { importSavedPoints('not json'); check(false, 'invalid json rejected'); }
+		catch { check(true, 'invalid json rejected'); }
+		clearSavedPoints();
+	}
+
 	console.log(`\n${checks - failures}/${checks} checks passed`);
 	if (failures > 0) {
 		console.error(`${failures} check(s) FAILED`);