diff --git a/docs/CONSUMER-INTEGRATION.md b/docs/CONSUMER-INTEGRATION.md
index b941104..87d88be 100644
--- a/docs/CONSUMER-INTEGRATION.md
+++ b/docs/CONSUMER-INTEGRATION.md
@@ -132,6 +132,7 @@ Central's archive.
 | `CENTRAL_DISASTER` | `central.disaster.>` | 7 | 1 GiB | ✓ | ✓ |
 | `CENTRAL_HYDRO` | `central.hydro.>` | 7 | 1 GiB | ✓ | ✓ |
 | `CENTRAL_TRAFFIC` | `central.traffic.>` | 7 | 1 GiB | ✓ | ✓ |
+| `CENTRAL_TRAFFIC_FLOW` | `central.traffic_flow.>` | 7 | 1 GiB | ✓ | ✓ |
 | `CENTRAL_META` | `central.meta.>` | 1 | 1 GiB | — | ✓ |
 
 Retention and storage caps are migration-seeded defaults visible in `config.streams`;
@@ -1517,6 +1518,40 @@ road name, description, county, severity). Verified for Idaho only.
 - **Removal semantics:** none in v1. Events age out of the upstream feed; the
   14-day dedup sweep expires stale ids.
 
+### tomtom_flow — TomTom Orbis vector flow tiles (per-segment speed, telemetry)
+
+Per-road-segment traffic speed from TomTom Orbis **vector** flow tiles, polled for
+a configured tile coverage set (Idaho metros at z=10). Each segment is one
+telemetry Event carrying a LineString/MultiLineString geometry (drawn as a
+colored polyline on the `/telemetry` map) — green free-flowing, red jammed.
+
+- **Stream:** `CENTRAL_TRAFFIC_FLOW` (telemetry; `/telemetry` tab).
+- **Subject pattern:** `central.traffic_flow.{z}.{x}.{y}` — tile-routable (segments
+  carry no state). Distinct token from `central.traffic.>` (no overlap).
+- **GUI event_type:** `flow` (from `category = "flow.tomtom_flow"`).
+- **Cadence default:** 300s (5 min). **Retention:** 7 days (high-volume telemetry).
+- **Dedup key shape:** `{z}/{x}/{y}:{segment_index}:{minute}` — minute-bucketed so
+  an adapter poll and an on-demand passthrough fetch of the same tile in the same
+  minute don't double-store (TomTom advertises a 60s tile TTL).
+- **Event.data fields:**
+
+  | key | type | nullable | description |
+  |---|---|---|---|
+  | `relative_speed` | float | yes | 0-1 ratio of current to free-flow speed (drives severity + color) |
+  | `road_category` | str | yes | `motorway` / `trunk` / `primary` / `secondary` |
+  | `tile_z` / `tile_x` / `tile_y` | int | no | Source slippy tile |
+  | `segment_index` | int | no | Index within the tile's "Traffic flow" layer |
+  | `tier` | str | no | `orbis` |
+  | `fetched_at` | str (ISO 8601 UTC) | no | Poll timestamp |
+
+  Geometry (the road polyline) is on `geo.geometry`, persisted to the PostGIS
+  `geom` column and returned by the map as GeoJSON.
+- **Severity:** from `relative_speed` — `>=0.75`=1 (free), `0.5-0.75`=2, `0.25-0.5`=3,
+  `<0.25`=4 (jam).
+- **Decipherable as-is:** yes — speed ratio + road class + geometry are self-contained.
+- **Removal semantics:** none; time-series telemetry, one snapshot per poll, swept
+  by the 7-day retention.
+
 ### wzdx — FHWA Work Zone Data Exchange (state-DOT work zones)
 
 Active road work zones discovered from the federal WZDx Feed Registry and each
diff --git a/docs/PRODUCER-INTEGRATION.md b/docs/PRODUCER-INTEGRATION.md
index 026bc82..6276df4 100644
--- a/docs/PRODUCER-INTEGRATION.md
+++ b/docs/PRODUCER-INTEGRATION.md
@@ -362,7 +362,7 @@ central.<domain>.<subtype>[.<dimensions>...]
 ```
 
 - `<domain>` is one of `wx`, `fire`, `quake`, `space`, `disaster`, `hydro`,
-  `traffic`, `meta` (the current set — see [§8](#8-the-streamentry-registry) for adding
+  `traffic`, `traffic_flow`, `meta` (the current set — see [§8](#8-the-streamentry-registry) for adding
   one). Operators MUST be able to subscribe to all of one domain with
   `central.<domain>.>`.
 - `<subtype>` is adapter-driven and identifies the event category within the
@@ -551,6 +551,7 @@ STREAMS: list[StreamEntry] = [
     StreamEntry("CENTRAL_DISASTER", "central.disaster.>"),
     StreamEntry("CENTRAL_HYDRO",    "central.hydro.>"),
     StreamEntry("CENTRAL_TRAFFIC",  "central.traffic.>"),
+    StreamEntry("CENTRAL_TRAFFIC_FLOW", "central.traffic_flow.>"),
     StreamEntry("CENTRAL_META",     "central.meta.>", event_bearing=False),
 ]
 ```
diff --git a/pyproject.toml b/pyproject.toml
index 2922e9f..9dd4745 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,6 +12,8 @@ license = {text = "MIT"}
 authors = [{name = "Matt Johnson"}]
 dependencies = [
     "aiohttp>=3.13.5",
+    "mapbox-vector-tile>=2.0",
+    "itsdangerous>=2.2",  # used by gui/csrf.py + gui/wizard.py (was an undeclared transitive)
     "argon2-cffi>=25.1.0",
     "asyncpg>=0.31.0",
     "cloudevents>=2.0.0",
diff --git a/sql/migrations/027_add_tomtom_flow_adapter_and_flow_stream.sql b/sql/migrations/027_add_tomtom_flow_adapter_and_flow_stream.sql
new file mode 100644
index 0000000..a256c2b
--- /dev/null
+++ b/sql/migrations/027_add_tomtom_flow_adapter_and_flow_stream.sql
@@ -0,0 +1,20 @@
+-- Migration: 027_add_tomtom_flow_adapter_and_flow_stream
+-- Adds the CENTRAL_TRAFFIC_FLOW JetStream stream (telemetry; central.traffic_flow.>,
+-- non-overlapping with CENTRAL_TRAFFIC's central.traffic.>) AND the tomtom_flow
+-- adapter row. NEW event-bearing stream -> central-archive restart required at deploy
+-- (feedback_new_stream_needs_archive_restart). 7-day retention (high-volume telemetry).
+-- Ships disabled; operator adds a "tomtom" api_key + enables. Idaho metros at z=10.
+-- Additive-only: idempotent via ON CONFLICT DO NOTHING.
+
+INSERT INTO config.streams (name, max_age_s, max_bytes)
+VALUES ('CENTRAL_TRAFFIC_FLOW', 604800, 1073741824)
+ON CONFLICT (name) DO NOTHING;
+
+INSERT INTO config.adapters (name, enabled, cadence_s, settings)
+VALUES (
+    'tomtom_flow',
+    false,
+    300,
+    '{"api_key_alias": "tomtom", "tiles": [{"z":10,"x":181,"y":373},{"z":10,"x":180,"y":374},{"z":10,"x":179,"y":357},{"z":10,"x":193,"y":374},{"z":10,"x":192,"y":376},{"z":10,"x":186,"y":377},{"z":10,"x":179,"y":362},{"z":10,"x":181,"y":374},{"z":10,"x":182,"y":373},{"z":10,"x":182,"y":374}]}'::jsonb
+)
+ON CONFLICT (name) DO NOTHING;
diff --git a/src/central/adapters/tomtom_flow.py b/src/central/adapters/tomtom_flow.py
new file mode 100644
index 0000000..81ab5c1
--- /dev/null
+++ b/src/central/adapters/tomtom_flow.py
@@ -0,0 +1,179 @@
+"""TomTom Orbis vector flow-tile polling adapter (telemetry).
+
+Polls a configured set of slippy tiles (Idaho metros at z=10), fetches each
+Orbis vector flow tile, decodes per-segment relative_speed + geometry via
+``tomtom_flow_parse``, and emits one telemetry Event per road segment per poll
+to CENTRAL_TRAFFIC_FLOW (subject ``central.traffic_flow.{z}.{x}.{y}``). The
+v0.9.4 on-demand passthrough route reuses the same decode helper.
+
+Dedup is inherited from SourceAdapter; ids are minute-bucketed so an adapter
+poll and a passthrough fetch of the same tile in the same minute don't double
+store (TomTom advertises a 60s tile TTL).
+"""
+
+import asyncio
+import logging
+import sqlite3
+from collections.abc import AsyncIterator
+from datetime import datetime, timezone
+from pathlib import Path
+
+import aiohttp
+from pydantic import BaseModel
+from tenacity import (
+    retry,
+    retry_if_exception_type,
+    stop_after_attempt,
+    wait_exponential_jitter,
+)
+
+from central.adapter import SourceAdapter
+from central.config_models import AdapterConfig
+from central.config_store import ConfigStore
+from central.models import Event
+from central.tomtom_flow_parse import decode_flow_tile
+
+logger = logging.getLogger(__name__)
+
+_ORBIS_FLOW_URL = "https://api.tomtom.com/maps/orbis/traffic/tile/flow/{z}/{x}/{y}.pbf?key={key}&apiVersion=1"
+_FETCH_CONCURRENCY = 4
+_FETCH_TIMEOUT_S = 30
+
+_DEDUP_DDL = (
+    "CREATE TABLE IF NOT EXISTS published_ids ("
+    "adapter TEXT NOT NULL, event_id TEXT NOT NULL, "
+    "first_seen TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, "
+    "last_seen TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, "
+    "PRIMARY KEY (adapter, event_id))"
+)
+
+
+class TileCoord(BaseModel):
+    z: int
+    x: int
+    y: int
+
+
+class TomTomFlowSettings(BaseModel):
+    """tiles: slippy coordinates to poll. api_key_alias: config.api_keys entry."""
+
+    tiles: list[TileCoord] = []
+    api_key_alias: str = "tomtom"
+
+
+class TomTomFlowAdapter(SourceAdapter):
+    """TomTom Orbis vector flow-tile telemetry adapter."""
+
+    name = "tomtom_flow"
+    display_name = "TomTom Traffic Flow"
+    description = (
+        "Per-road-segment traffic speed (relative_speed) from TomTom Orbis vector "
+        "flow tiles, for a configured tile coverage set. Telemetry; renders as "
+        "colored polylines on the map."
+    )
+    settings_schema = TomTomFlowSettings
+    requires_api_key = "tomtom"
+    api_key_field = "api_key_alias"
+    wizard_order = None  # Ships disabled
+    default_cadence_s = 300
+    data_class = "telemetry"
+    enrichment_locations = []  # segments carry their own geometry; no point geocode
+
+    def __init__(
+        self,
+        config: AdapterConfig,
+        config_store: ConfigStore,
+        cursor_db_path: Path,
+    ) -> None:
+        self._config_store = config_store
+        self._cursor_db_path = cursor_db_path
+        self._session: aiohttp.ClientSession | None = None
+        self._db: sqlite3.Connection | None = None
+        self._tiles: list[TileCoord] = self._read_tiles(config)
+        self._api_key_alias: str = config.settings.get("api_key_alias", "tomtom")
+        self._api_key: str | None = None
+
+    @staticmethod
+    def _read_tiles(config: AdapterConfig) -> list[TileCoord]:
+        return [TileCoord(**t) for t in (config.settings.get("tiles") or [])]
+
+    def _redact(self, text: str) -> str:
+        return text.replace(self._api_key, "<KEY>") if self._api_key else text
+
+    async def startup(self) -> None:
+        self._session = aiohttp.ClientSession(
+            timeout=aiohttp.ClientTimeout(total=_FETCH_TIMEOUT_S),
+            headers={"User-Agent": "Central/0.9 (+tomtom_flow)"},
+        )
+        self._db = sqlite3.connect(self._cursor_db_path)
+        self._db.execute(_DEDUP_DDL)
+        self._db.execute("CREATE INDEX IF NOT EXISTS published_ids_last_seen ON published_ids (last_seen)")
+        self._db.commit()
+        self._api_key = await self._config_store.get_api_key(self._api_key_alias)
+        logger.info("tomtom_flow adapter started",
+                    extra={"tiles": len(self._tiles), "api_key_present": bool(self._api_key)})
+
+    async def shutdown(self) -> None:
+        if self._session:
+            await self._session.close()
+            self._session = None
+        if self._db:
+            self._db.close()
+            self._db = None
+
+    async def apply_config(self, new_config: AdapterConfig) -> None:
+        self._tiles = self._read_tiles(new_config)
+        self._api_key_alias = new_config.settings.get("api_key_alias", "tomtom")
+        self._api_key = await self._config_store.get_api_key(self._api_key_alias)
+        logger.info("tomtom_flow config updated",
+                    extra={"tiles": len(self._tiles), "api_key_present": bool(self._api_key)})
+
+    @retry(
+        stop=stop_after_attempt(3),
+        wait=wait_exponential_jitter(initial=1, max=30),
+        retry=retry_if_exception_type((aiohttp.ClientError, TimeoutError)),
+    )
+    async def _fetch_tile(self, z: int, x: int, y: int) -> bytes:
+        assert self._session is not None
+        url = _ORBIS_FLOW_URL.format(z=z, x=x, y=y, key=self._api_key)
+        async with self._session.get(url) as resp:
+            resp.raise_for_status()
+            return await resp.read()
+
+    async def poll(self) -> AsyncIterator[Event]:
+        if not self._session:
+            raise RuntimeError("Session not initialized")
+        if not self._api_key:
+            logger.warning("tomtom_flow: no API key for alias; skipping poll",
+                           extra={"alias": self._api_key_alias})
+            return
+        now = datetime.now(timezone.utc)
+        sem = asyncio.Semaphore(_FETCH_CONCURRENCY)
+
+        async def _one(tile: TileCoord) -> list[Event]:
+            async with sem:
+                try:
+                    pbf = await self._fetch_tile(tile.z, tile.x, tile.y)
+                except (aiohttp.ClientError, TimeoutError) as exc:
+                    logger.warning("tomtom_flow tile fetch failed",
+                                   extra={"tile": [tile.z, tile.x, tile.y], "error": self._redact(str(exc))})
+                    return []
+                try:
+                    return decode_flow_tile(pbf, tile.z, tile.x, tile.y, now)
+                except Exception:
+                    logger.exception("tomtom_flow decode failed", extra={"tile": [tile.z, tile.x, tile.y]})
+                    return []
+
+        results = await asyncio.gather(*[_one(t) for t in self._tiles])
+        yielded = 0
+        for evs in results:
+            for ev in evs:
+                yield ev
+                yielded += 1
+
+        self.sweep_old_ids()
+        logger.info("tomtom_flow poll completed", extra={"events_yielded": yielded, "tiles": len(self._tiles)})
+
+    def subject_for(self, event: Event) -> str:
+        d = event.data
+        return f"central.traffic_flow.{d.get('tile_z')}.{d.get('tile_x')}.{d.get('tile_y')}"
diff --git a/src/central/archive.py b/src/central/archive.py
index dfa5475..f26a104 100644
--- a/src/central/archive.py
+++ b/src/central/archive.py
@@ -75,6 +75,13 @@ def _build_geom_sql(geo_data: dict[str, Any] | None) -> str | None:
     if not geo_data:
         return None
 
+    # A full GeoJSON geometry (e.g. flow-segment LineString) wins over the
+    # bbox/centroid fallbacks so the map renders the real shape. Inert for
+    # adapters that don't set geo.geometry.
+    geometry = geo_data.get("geometry")
+    if geometry:
+        return json.dumps(geometry)
+
     bbox = geo_data.get("bbox")
     centroid = geo_data.get("centroid")
 
diff --git a/src/central/gui/routes.py b/src/central/gui/routes.py
index e87e25a..9466c0d 100644
--- a/src/central/gui/routes.py
+++ b/src/central/gui/routes.py
@@ -2651,7 +2651,7 @@ ADAPTER_GROUPS = {
     "Space": ["swpc_alerts", "swpc_kindex", "swpc_protons"],
     "Geophysical": ["usgs_quake", "nwis"],
     "Earth Observation": ["eonet"],
-    "Transportation": ["wzdx", "state_511_atis"],
+    "Transportation": ["wzdx", "state_511_atis", "tomtom_flow"],
 }
 # Same palette the map legend uses, indexed by sorted-adapter position.
 EVENTS_PALETTE = [
diff --git a/src/central/gui/templates/_event_rows/tomtom_flow.html b/src/central/gui/templates/_event_rows/tomtom_flow.html
new file mode 100644
index 0000000..07672e1
--- /dev/null
+++ b/src/central/gui/templates/_event_rows/tomtom_flow.html
@@ -0,0 +1,6 @@
+{# TomTom flow segment detail rows. Fields from payload->data->data. #}
+{% set d = (event.data.get('data') or {}).get('data') or {} %}
+{% if d.get('road_category') %}<dt>Road class</dt><dd>{{ d.road_category }}</dd>{% endif %}
+{% if d.get('relative_speed') is not none %}<dt>Relative speed</dt><dd>{{ (d.relative_speed * 100) | round | int }}% of free-flow</dd>{% endif %}
+{% if d.get('tile_z') is not none %}<dt>Tile</dt><dd>{{ d.tile_z }}/{{ d.tile_x }}/{{ d.tile_y }} (segment {{ d.segment_index }})</dd>{% endif %}
+{% if d.get('fetched_at') %}<dt>Fetched</dt><dd>{{ d.fetched_at }}</dd>{% endif %}
diff --git a/src/central/gui/templates/_event_summaries/tomtom_flow.html b/src/central/gui/templates/_event_summaries/tomtom_flow.html
new file mode 100644
index 0000000..7146512
--- /dev/null
+++ b/src/central/gui/templates/_event_summaries/tomtom_flow.html
@@ -0,0 +1,5 @@
+{# TomTom flow segment one-line subject. relative_speed -> % of free-flow.
+   Fields from payload->data->data. #}
+{% set d = (event.data.get('data') or {}).get('data') or {} %}
+{%- set rs = d.get('relative_speed') -%}
+Traffic flow{% if d.get('road_category') %} ({{ d.road_category }}){% endif %}{% if rs is not none %} — {{ (rs * 100) | round | int }}% of free-flow{% endif %}
diff --git a/src/central/gui/templates/events_list.html b/src/central/gui/templates/events_list.html
index df9d54a..73bcf1e 100644
--- a/src/central/gui/templates/events_list.html
+++ b/src/central/gui/templates/events_list.html
@@ -136,6 +136,11 @@
         return ADAPTER_COLORS[adapter] || "#3388ff";
     }
 
+    // tomtom_flow segments color by severity (relative_speed band): green=free
+    // flowing, red=jammed. Mirrors the green/yellow/red flow overlay.
+    var FLOW_COLOR = { "1": "#2ecc71", "2": "#f1c40f", "3": "#e67e22", "4": "#e74c3c" };
+    function flowColor(sev) { return FLOW_COLOR[sev] || "#7f8c8d"; }
+
     // Flatten arbitrarily-nested GeoJSON coordinates into a flat [lng, lat] list.
     function flattenCoords(coords, out) {
         if (coords.length && typeof coords[0] === "number") {
@@ -301,7 +306,7 @@
                 if (!geom) return;
 
                 var adapter = row.dataset.adapter || "";
-                var color = getAdapterColor(adapter);
+                var color = adapter === "tomtom_flow" ? flowColor(row.dataset.severity) : getAdapterColor(adapter);
                 var op = severityOpacity(row);
 
                 // Point-like geometries (Points + zero-extent polygons from
diff --git a/src/central/models.py b/src/central/models.py
index c7a2159..4407405 100644
--- a/src/central/models.py
+++ b/src/central/models.py
@@ -15,6 +15,7 @@ class Geo(BaseModel):
     bbox: tuple[float, float, float, float] | None = None  # (minLon, minLat, maxLon, maxLat)
     regions: list[str] = []  # ["US-ID-Ada", "US-ID-Z033", ...]
     primary_region: str | None = None  # alphabetically first region, used for subject
+    geometry: dict[str, Any] | None = None  # full GeoJSON geometry; preferred by the archive over bbox/centroid for the map geom column
 
 
 class Event(BaseModel):
diff --git a/src/central/streams.py b/src/central/streams.py
index cc940d8..98af7d4 100644
--- a/src/central/streams.py
+++ b/src/central/streams.py
@@ -30,5 +30,6 @@ STREAMS: list[StreamEntry] = [
     StreamEntry("CENTRAL_DISASTER", "central.disaster.>"),
     StreamEntry("CENTRAL_HYDRO",    "central.hydro.>"),
     StreamEntry("CENTRAL_TRAFFIC",  "central.traffic.>"),
+    StreamEntry("CENTRAL_TRAFFIC_FLOW", "central.traffic_flow.>"),
     StreamEntry("CENTRAL_META",     "central.meta.>", event_bearing=False),
 ]
diff --git a/src/central/tomtom_flow_parse.py b/src/central/tomtom_flow_parse.py
new file mode 100644
index 0000000..09c5c01
--- /dev/null
+++ b/src/central/tomtom_flow_parse.py
@@ -0,0 +1,113 @@
+"""Decode TomTom Orbis vector flow tiles into per-segment telemetry Events.
+
+Shared by the ``tomtom_flow`` polling adapter and (v0.9.4) the on-demand
+passthrough route. A vector flow tile's ``"Traffic flow"`` layer carries one
+feature per road segment with ``relative_speed`` (0-1 current/free-flow ratio)
+and ``road_category``, in tile-local MVT coordinates (extent 4096, y-up). We
+georeference each vertex to lon/lat via the slippy-tile + Web-Mercator inverse
+and emit one telemetry Event per segment, carrying the LineString geometry (so
+the map draws a colored polyline) and a severity derived from relative_speed.
+"""
+
+import math
+from datetime import datetime
+from typing import Any
+
+import mapbox_vector_tile
+
+from central.models import Event, Geo
+
+FLOW_LAYER = "Traffic flow"
+ADAPTER_NAME = "tomtom_flow"
+
+
+def severity_from_relative_speed(rs: float | None) -> int:
+    """relative_speed (0-1, current/free-flow) -> severity; lower speed = worse."""
+    if rs is None:
+        return 1
+    if rs >= 0.75:
+        return 1
+    if rs >= 0.5:
+        return 2
+    if rs >= 0.25:
+        return 3
+    return 4
+
+
+def _merc_y_to_lat(t: float) -> float:
+    """Normalized web-mercator row (0=north world edge .. 1=south) -> latitude deg."""
+    return math.degrees(math.atan(math.sinh(math.pi * (1 - 2 * t))))
+
+
+def _local_to_lonlat(lx: float, ly: float, z: int, x: int, y: int, extent: int) -> list[float]:
+    """MVT tile-local (lx, ly) [y-up, 0..extent] -> [lon, lat] degrees."""
+    n = 2 ** z
+    lon_left = x / n * 360.0 - 180.0
+    lon_right = (x + 1) / n * 360.0 - 180.0
+    fx = lx / extent
+    fy = ly / extent  # mapbox_vector_tile default orientation is y-up (0 = tile bottom)
+    lon = lon_left + fx * (lon_right - lon_left)
+    lat = _merc_y_to_lat((y + (1 - fy)) / n)  # fy=1 (top)->y/n ; fy=0 (bottom)->(y+1)/n
+    return [round(lon, 6), round(lat, 6)]
+
+
+def _transform_coords(coords: Any, z: int, x: int, y: int, extent: int) -> Any:
+    """Recursively georeference nested MVT coordinate arrays to lon/lat."""
+    if coords and isinstance(coords[0], (int, float)):
+        return _local_to_lonlat(coords[0], coords[1], z, x, y, extent)
+    return [_transform_coords(c, z, x, y, extent) for c in coords]
+
+
+def _midpoint(coordinates: Any) -> tuple[float, float] | None:
+    """Mean (lon, lat) over all vertices — the clustering centroid."""
+    pts: list[list[float]] = []
+
+    def walk(c: Any) -> None:
+        if c and isinstance(c[0], (int, float)):
+            pts.append(c)
+        else:
+            for sub in c:
+                walk(sub)
+
+    walk(coordinates or [])
+    if not pts:
+        return None
+    return (sum(p[0] for p in pts) / len(pts), sum(p[1] for p in pts) / len(pts))
+
+
+def decode_flow_tile(pbf: bytes, z: int, x: int, y: int, fetched_at: datetime) -> list[Event]:
+    """Decode one Orbis vector flow tile into per-segment telemetry Events."""
+    decoded = mapbox_vector_tile.decode(pbf)
+    layer = decoded.get(FLOW_LAYER)
+    if not layer:
+        return []
+    extent = layer.get("extent", 4096)
+    minute = fetched_at.strftime("%Y-%m-%dT%H:%M")
+    events: list[Event] = []
+    for idx, feat in enumerate(layer.get("features", [])):
+        props = feat.get("properties") or {}
+        geom = feat.get("geometry") or {}
+        coords = _transform_coords(geom.get("coordinates") or [], z, x, y, extent)
+        gj = {"type": geom.get("type"), "coordinates": coords}
+        rs = props.get("relative_speed")
+        events.append(
+            Event(
+                id=f"{z}/{x}/{y}:{idx}:{minute}",
+                adapter=ADAPTER_NAME,
+                category="flow.tomtom_flow",
+                time=fetched_at,
+                severity=severity_from_relative_speed(rs),
+                geo=Geo(centroid=_midpoint(coords), geometry=gj, regions=[], primary_region=None),
+                data={
+                    "relative_speed": rs,
+                    "road_category": props.get("road_category"),
+                    "tile_z": z,
+                    "tile_x": x,
+                    "tile_y": y,
+                    "segment_index": idx,
+                    "tier": "orbis",
+                    "fetched_at": fetched_at.isoformat(),
+                },
+            )
+        )
+    return events
diff --git a/tests/fixtures/tomtom_flow_orbis.pbf b/tests/fixtures/tomtom_flow_orbis.pbf
new file mode 100644
index 0000000..4b37ebc
Binary files /dev/null and b/tests/fixtures/tomtom_flow_orbis.pbf differ
diff --git a/tests/test_events_feed_frontend.py b/tests/test_events_feed_frontend.py
index 142f0c7..cf41ddb 100644
--- a/tests/test_events_feed_frontend.py
+++ b/tests/test_events_feed_frontend.py
@@ -1144,6 +1144,7 @@ _SAMPLE_INNER = {
     "wfigs_perimeters": {"county": "Carbon", "state": "MT"},
     "wzdx": {"road_names": ["I-80"], "direction": "eastbound"},
     "state_511_atis": {"layer": "Incidents", "roadway_name": "US-95", "location_description": "Ponderosa Mobile Home Park"},
+    "tomtom_flow": {"road_category": "primary", "relative_speed": 0.11},
 }
 
 # Exact expected subjects for the deterministic adapters. swpc_alerts is omitted
@@ -1163,6 +1164,7 @@ _EXPECTED_SUBJECT = {
     "wfigs_incidents": "Wildfire incident — Montezuma, CO",
     "wfigs_perimeters": "Wildfire perimeter — Carbon, MT",
     "wzdx": "Work zone on I-80 eastbound",
+    "tomtom_flow": "Traffic flow (primary) — 11% of free-flow",
 }
 
 
diff --git a/tests/test_telemetry_separation.py b/tests/test_telemetry_separation.py
index 6d0d97a..137d71a 100644
--- a/tests/test_telemetry_separation.py
+++ b/tests/test_telemetry_separation.py
@@ -10,6 +10,9 @@ from central.adapter import SourceAdapter
 from central.adapter_discovery import discover_adapters
 from central.gui import routes
 
+# Adapters with data_class="telemetry" (the pinned split; grow as telemetry adapters land).
+_TELEMETRY = ["nwis", "tomtom_flow"]
+
 
 # --- data_class defaults / registry split -----------------------------------
 
@@ -22,15 +25,15 @@ def test_registry_split_11_event_1_telemetry():
     by_class = {}
     for name, cls in reg.items():
         by_class.setdefault(getattr(cls, "data_class", "event"), []).append(name)
-    assert by_class.get("telemetry") == ["nwis"]
+    assert sorted(by_class.get("telemetry", [])) == _TELEMETRY
     # Everything else is event-class; the split must cover the whole registry.
-    assert sorted(by_class.get("event", [])) == sorted(n for n in reg if n != "nwis")
-    assert len(by_class.get("event", [])) == len(reg) - 1
+    assert sorted(by_class.get("event", [])) == sorted(n for n in reg if n not in _TELEMETRY)
+    assert len(by_class.get("event", [])) == len(reg) - len(_TELEMETRY)
 
 
 def test_class_adapter_names():
     assert "nwis" not in routes._class_adapter_names("event")
-    assert routes._class_adapter_names("telemetry") == ["nwis"]
+    assert sorted(routes._class_adapter_names("telemetry")) == _TELEMETRY
     assert "usgs_quake" in routes._class_adapter_names("event")
 
 
@@ -40,16 +43,16 @@ def test_event_options_exclude_nwis():
     flat, grouped = routes._adapter_filter_options("event")
     names = {a["name"] for a in flat}
     assert "nwis" not in names
-    assert len(flat) == len(discover_adapters()) - 1
+    assert len(flat) == len(discover_adapters()) - len(_TELEMETRY)
     grouped_values = {opt["value"] for _, items in grouped for opt in items}
     assert "nwis" not in grouped_values
 
 
 def test_telemetry_options_only_nwis():
     flat, grouped = routes._adapter_filter_options("telemetry")
-    assert [a["name"] for a in flat] == ["nwis"]
+    assert sorted(a["name"] for a in flat) == _TELEMETRY
     grouped_values = [opt["value"] for _, items in grouped for opt in items]
-    assert grouped_values == ["nwis"]
+    assert sorted(grouped_values) == _TELEMETRY
 
 
 def test_colors_stable_across_classes():
diff --git a/tests/test_tomtom_flow.py b/tests/test_tomtom_flow.py
new file mode 100644
index 0000000..957fe07
--- /dev/null
+++ b/tests/test_tomtom_flow.py
@@ -0,0 +1,128 @@
+"""Tests for the tomtom_flow adapter + shared decode module (v0.9.3).
+
+Fixture is a real Orbis vector flow tile (Boise z10/181/374):
+  tests/fixtures/tomtom_flow_orbis.pbf
+  -- curl 'https://api.tomtom.com/maps/orbis/traffic/tile/flow/10/181/374.pbf?key=…&apiVersion=1'
+
+No tests/conftest isolation entry: dedup uses the supervisor-injected cursors.db
+(inherited mixin); polling is stateless.
+"""
+
+import json
+from datetime import datetime, timezone
+from pathlib import Path
+from unittest.mock import AsyncMock, MagicMock
+
+import pytest
+
+from central.adapter import SourceAdapter
+from central.adapters.tomtom_flow import TomTomFlowAdapter
+from central.archive import _build_geom_sql
+from central.config_models import AdapterConfig
+from central.tomtom_flow_parse import (
+    _local_to_lonlat,
+    decode_flow_tile,
+    severity_from_relative_speed,
+)
+
+FIX = Path(__file__).parent / "fixtures" / "tomtom_flow_orbis.pbf"
+PBF = FIX.read_bytes()
+AT = datetime(2026, 5, 25, 22, 3, tzinfo=timezone.utc)
+
+
+def _cfg(tiles=None):
+    return AdapterConfig(
+        name="tomtom_flow", enabled=True, cadence_s=300,
+        settings={"api_key_alias": "tomtom", "tiles": tiles or [{"z": 10, "x": 181, "y": 374}]},
+        updated_at=datetime.now(timezone.utc),
+    )
+
+
+@pytest.mark.parametrize("rs,sev", [
+    (1.0, 1), (0.75, 1), (0.74, 2), (0.5, 2), (0.49, 3), (0.25, 3), (0.24, 4), (0.0, 4), (None, 1),
+])
+def test_severity_from_relative_speed(rs, sev):
+    assert severity_from_relative_speed(rs) == sev
+
+
+def test_local_to_lonlat_boise_tile():
+    # tile z10/181/374; local (0,0)=bottom-left -> SW corner ~ Boise area
+    lon, lat = _local_to_lonlat(2048, 2048, 10, 181, 374, 4096)  # tile center
+    assert -116.4 < lon < -116.0 and 43.4 < lat < 43.8
+
+
+def test_decode_flow_tile_real_fixture():
+    evs = decode_flow_tile(PBF, 10, 181, 374, AT)
+    assert len(evs) > 50
+    e = evs[0]
+    assert e.category == "flow.tomtom_flow"
+    assert e.adapter == "tomtom_flow"
+    assert e.geo.geometry["type"] in ("LineString", "MultiLineString")
+    assert e.data["road_category"] in ("motorway", "trunk", "primary", "secondary")
+    assert e.data["tile_z"] == 10 and e.data["tile_x"] == 181 and e.data["tile_y"] == 374
+    # vertices georeferenced near Boise
+    v = e.geo.geometry["coordinates"]
+    while isinstance(v[0], list):
+        v = v[0]
+    assert -117 < v[0] < -116 and 43 < v[1] < 44
+
+
+def test_dedup_key_minute_bucketed():
+    evs = decode_flow_tile(PBF, 10, 181, 374, AT)
+    assert evs[0].id == "10/181/374:0:2026-05-25T22:03"
+    later = decode_flow_tile(PBF, 10, 181, 374, datetime(2026, 5, 25, 22, 4, tzinfo=timezone.utc))
+    assert later[0].id != evs[0].id  # different minute -> different id
+
+
+def test_subject_for():
+    adapter = TomTomFlowAdapter(_cfg(), MagicMock(), Path("/tmp/unused.db"))
+    e = decode_flow_tile(PBF, 10, 181, 374, AT)[0]
+    assert adapter.subject_for(e) == "central.traffic_flow.10.181.374"
+
+
+def test_archive_prefers_geo_geometry():
+    line = {"type": "LineString", "coordinates": [[-116.2, 43.6], [-116.1, 43.7]]}
+    # geometry present -> returned verbatim (not bbox/centroid)
+    out = _build_geom_sql({"geometry": line, "centroid": [-116.2, 43.6], "bbox": [-116.3, 43.5, -116.0, 43.8]})
+    assert json.loads(out) == line
+    # no geometry -> falls back to centroid Point (regression guard)
+    out2 = _build_geom_sql({"centroid": [-116.2, 43.6]})
+    assert json.loads(out2)["type"] == "Point"
+
+
+@pytest.mark.asyncio
+async def test_poll_yields_segments(tmp_path):
+    cs = MagicMock()
+    cs.get_api_key = AsyncMock(return_value="testkey")
+    adapter = TomTomFlowAdapter(_cfg(), cs, tmp_path / "cursors.db")
+    await adapter.startup()
+    adapter._fetch_tile = AsyncMock(return_value=PBF)  # bypass retry + network
+    events = [e async for e in adapter.poll()]
+    await adapter.shutdown()
+    assert len(events) > 50
+    assert all(e.adapter == "tomtom_flow" for e in events)
+    assert all(e.category == "flow.tomtom_flow" for e in events)
+
+
+@pytest.mark.asyncio
+async def test_poll_skips_without_key(tmp_path):
+    cs = MagicMock()
+    cs.get_api_key = AsyncMock(return_value=None)
+    adapter = TomTomFlowAdapter(_cfg(), cs, tmp_path / "cursors.db")
+    await adapter.startup()
+    events = [e async for e in adapter.poll()]
+    await adapter.shutdown()
+    assert events == []  # no key -> no fetch, clean skip
+
+
+def test_summary_partial_renders():
+    from central.gui.routes import _derive_subject
+    inner = {"road_category": "primary", "relative_speed": 0.11}
+    row = {"adapter": "tomtom_flow", "data": {"data": {"data": inner}}}
+    assert _derive_subject(row) == "Traffic flow (primary) — 11% of free-flow"
+
+
+def test_inherits_dedup_mixin():
+    for m in ("is_published", "mark_published", "sweep_old_ids"):
+        assert m not in TomTomFlowAdapter.__dict__, f"redefines {m}"
+        assert getattr(TomTomFlowAdapter, m) is getattr(SourceAdapter, m)
diff --git a/uv.lock b/uv.lock
index ee8cabc..15c7f7f 100644
--- a/uv.lock
+++ b/uv.lock
@@ -172,7 +172,7 @@ wheels = [
 
 [[package]]
 name = "central"
-version = "0.1.0"
+version = "0.3.0"
 source = { editable = "." }
 dependencies = [
     { name = "aiohttp" },
@@ -181,8 +181,9 @@ dependencies = [
     { name = "cloudevents" },
     { name = "cryptography" },
     { name = "fastapi" },
-    { name = "fastapi-csrf-protect" },
+    { name = "itsdangerous" },
     { name = "jinja2" },
+    { name = "mapbox-vector-tile" },
     { name = "nats-py" },
     { name = "pydantic" },
     { name = "pydantic-settings" },
@@ -209,8 +210,9 @@ requires-dist = [
     { name = "cloudevents", specifier = ">=2.0.0" },
     { name = "cryptography", specifier = ">=44.0.0" },
     { name = "fastapi", specifier = ">=0.115.0" },
-    { name = "fastapi-csrf-protect", specifier = ">=0.4.0" },
+    { name = "itsdangerous", specifier = ">=2.2" },
     { name = "jinja2", specifier = ">=3.1.6" },
+    { name = "mapbox-vector-tile", specifier = ">=2.0" },
     { name = "nats-py", specifier = ">=2.14.0" },
     { name = "pydantic", specifier = ">=2,<3" },
     { name = "pydantic-settings", specifier = ">=2.7.0" },
@@ -362,21 +364,6 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/5a/ff/2e4eca3ade2c22fe1dea7043b8ee9dabe47753349eb1b56a202de8af6349/fastapi-0.136.1-py3-none-any.whl", hash = "sha256:a6e9d7eeada96c93a4d69cb03836b44fa34e2854accb7244a1ece36cd4781c3f", size = 117683, upload-time = "2026-04-23T16:49:42.437Z" },
 ]
 
-[[package]]
-name = "fastapi-csrf-protect"
-version = "1.0.7"
-source = { registry = "https://pypi.org/simple" }
-dependencies = [
-    { name = "itsdangerous" },
-    { name = "pydantic" },
-    { name = "pydantic-settings" },
-    { name = "starlette" },
-]
-sdist = { url = "https://files.pythonhosted.org/packages/f6/1a/fedbcb4aba24ccc8abfb5d30e08112073c6a9f20b8d88adbdd3051ceedac/fastapi_csrf_protect-1.0.7.tar.gz", hash = "sha256:888b15b232625aae5b997fbcf81ef45633a7694f0312a054f1eec6d132b295fb", size = 207326, upload-time = "2025-09-16T07:06:08.586Z" }
-wheels = [
-    { url = "https://files.pythonhosted.org/packages/bf/10/f248aab919678444723d557da918088e5c737b44e03e3aa4a0ad7afc7dae/fastapi_csrf_protect-1.0.7-py3-none-any.whl", hash = "sha256:ca3c5b50564af932ac4ed3d06caeed61bf16eed13a31cfe2bdfc3f7c1e8612a3", size = 18412, upload-time = "2025-09-16T07:06:05.926Z" },
-]
-
 [[package]]
 name = "frozenlist"
 version = "1.8.0"
@@ -514,6 +501,20 @@ wheels = [
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 ]
 
+[[package]]
+name = "mapbox-vector-tile"
+version = "2.2.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "protobuf" },
+    { name = "pyclipper" },
+    { name = "shapely" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/e9/e0/b511bd7433105d363f37bb83f00a6e15502b04ebcec68c25e3da630d2b53/mapbox_vector_tile-2.2.0.tar.gz", hash = "sha256:9fbf2e94890429ccdaf8e047019dccadd9deb03f5b2ae9b5c5561d27a20a0eb3", size = 26038, upload-time = "2025-07-08T02:20:09.532Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/50/79/cb2a50533c9c3b545eace2deffba0d002b56713c68b26b6ac1e53a4c1d18/mapbox_vector_tile-2.2.0-py3-none-any.whl", hash = "sha256:d26ad320ade60cc6c0b66edc6ee4b6f53663aedf0b444b115c6ba68e9ba1e6d1", size = 23986, upload-time = "2025-07-08T02:20:08.415Z" },
+]
+
 [[package]]
 name = "markupsafe"
 version = "3.0.3"
@@ -673,6 +674,35 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/3a/ed/1cdcab6ba3d6ab7feca11fc14f0eeea80755bb53ef4e892079f31b10a25f/propcache-0.5.2-py3-none-any.whl", hash = "sha256:be1ddfcbb376e3de5d2e2db1d58d6d67463e6b4f9f040c000de8e300295465fe", size = 14036, upload-time = "2026-05-08T21:02:10.673Z" },
 ]
 
+[[package]]
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+version = "6.33.6"
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+wheels = [
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