cars: test tertiary and residential vehicle layer in a local window

vendor/clouds3d.js

@@ -3028,6 +3028,7 @@ var CAR_MOTORWAY_RX = '^(motorway|motorway_link|trunk|trunk_link)$';
 // explode a single Overpass cell to several megabytes until the mirrors
 // timed out and the whole layer came back empty.
 var CAR_SECONDARY_RX = '^(primary|primary_link|secondary|secondary_link)$';
+var CAR_MINOR_RX = '^(tertiary|tertiary_link|unclassified|residential|living_street)$';
 // Side-road coverage follows the CONFIG location and matches the traffic
 // disc (rangeKm = 200 km ~ 1.8 deg latitude / 2.5 deg longitude at 48 deg N),
 // in cells small enough that no single query explodes.
@@ -3046,7 +3047,15 @@ var CAR_QUERIES = carCells('geo/mw11', CAR_MOTORWAY_RX, 46.8, 9.4, 50.1, 13.4, 1
     // Side roads around the configured location, in cells small enough that
     // no single query explodes (a 0.55 deg cell here cost 6.5 MB and the
     // mirrors answered 504).
-    carCells('geo/sec10', CAR_SECONDARY_RX, SEC_S, SEC_W, SEC_N, SEC_E, SEC_LAT_STEP, SEC_LON_STEP)
+    carCells('geo/sec10', CAR_SECONDARY_RX, SEC_S, SEC_W, SEC_N, SEC_E, SEC_LAT_STEP, SEC_LON_STEP),
+    // Test layer: tertiary/residential only in a small local window, with
+    // small cells so the public Overpass mirrors do not explode.
+    carCells('geo/minor10', CAR_MINOR_RX,
+        Math.max(45.8, Math.round((_baseLat - 0.6) * 100) / 100),
+        Math.max(7.5, Math.round((_baseLon - 0.8) * 100) / 100),
+        Math.min(51.5, Math.round((_baseLat + 0.6) * 100) / 100),
+        Math.min(18.5, Math.round((_baseLon + 0.8) * 100) / 100),
+        0.12, 0.14)
 );
 // Drop what can never be seen (the world disc is ~278 km across, so cells
 // far outside it cost quota and add no light), then fill it RING BY RING
@@ -3433,7 +3442,7 @@ function fetchMotorways() {
             if (el.type !== 'way' || !el.geometry || el.geometry.length < 2) return;
             var hw = (el.tags && el.tags.highway) || '';
             var key = /^(motorway|trunk)/.test(hw) ? 'motorway'
-                : (/^(primary|secondary)/.test(hw) ? 'secondary' : null);
+                : (/^(primary|secondary|tertiary|tertiary_link|unclassified|residential|living_street)/.test(hw) ? 'secondary' : null);
             if (!key) return;
 
             var pts = el.geometry.map(function (g) {