Add car journeys to trips

tests/test_trip.py

@@ -1,5 +1,7 @@
 """Tests for trip map coordinate assembly."""
 
+import json
+import pathlib
 from datetime import date
 
 import agenda.trip
@@ -167,3 +169,72 @@ def test_get_trip_routes_assumes_unbooked_paris_trip_is_by_train(
             "geojson_filename": "train_routes/London_St_Pancras_to_Paris_Gare_du_Nord",
         }
     ]
+
+
+def test_load_cars_infers_route_labels_and_home_marker(tmp_path: pathlib.Path) -> None:
+    """Car journeys should load direct GeoJSON routes and endpoint markers."""
+    (tmp_path / "car_routes").mkdir()
+    (tmp_path / "car_journeys.yaml").write_text("""---
+- trip: 2026-07-16
+  depart: 2026-07-16
+  arrive: 2026-07-16
+  route: PCH_to_EMF.geojson
+""")
+    (tmp_path / "car_routes" / "PCH_to_EMF.geojson").write_text(
+        json.dumps(
+            {
+                "type": "Feature",
+                "properties": {},
+                "geometry": {
+                    "type": "LineString",
+                    "coordinates": [[-2.60283, 51.44083], [-1.2, 52.0]],
+                },
+            }
+        )
+    )
+
+    cars = agenda.trip.load_cars(str(tmp_path))
+
+    assert len(cars) == 1
+    assert cars[0]["type"] == "car"
+    assert cars[0]["from"] == "PCH"
+    assert cars[0]["to"] == "EMF"
+    assert cars[0]["geojson_filename"] == "PCH_to_EMF"
+    assert cars[0]["distance"] > 0
+    assert cars[0]["from_location"] == {
+        "name": "PCH",
+        "type": "home",
+        "latitude": 51.44083,
+        "longitude": -2.60283,
+    }
+    assert cars[0]["to_location"] == {
+        "name": "EMF",
+        "type": "car_stop",
+        "latitude": 52.0,
+        "longitude": -1.2,
+    }
+
+
+def test_get_trip_routes_includes_car_geojson() -> None:
+    """Car routes should render from the car_routes directory."""
+    trip = Trip(
+        start=date(2026, 7, 16),
+        travel=[
+            {
+                "type": "car",
+                "from": "PCH",
+                "to": "EMF",
+                "geojson_filename": "PCH_to_EMF",
+            }
+        ],
+    )
+
+    routes = agenda.trip.get_trip_routes(trip, "/tmp/personal-data")
+
+    assert routes == [
+        {
+            "type": "car",
+            "key": "car_PCH_EMF_PCH_to_EMF",
+            "geojson_filename": "car_routes/PCH_to_EMF",
+        }
+    ]