diff --git a/wien_talks/wien_talks_flutter/lib/widgets/ubahn_tape.dart b/wien_talks/wien_talks_flutter/lib/widgets/ubahn_tape.dart
new file mode 100644
index 0000000..66a4c4a
--- /dev/null
+++ b/wien_talks/wien_talks_flutter/lib/widgets/ubahn_tape.dart
@@ -0,0 +1,193 @@
+import 'dart:math' as math;
+
+import 'package:flutter/material.dart';
+
+class UbahnTape extends StatelessWidget {
+  const UbahnTape({
+    super.key,
+    this.lat,
+    this.lon,
+    this.rotationDeg = -6,
+    this.maxLinesShown = 1,
+    this.stations = kViennaStationsSample,
+  });
+
+  final double? lat;
+  final double? lon;
+  final double rotationDeg;
+  final int maxLinesShown;
+  final List<UbahnStation> stations;
+
+  @override
+  Widget build(BuildContext context) {
+    final lines = _resolveLines();
+    final primary = lines.isNotEmpty
+        ? (kUbahnLineColors[lines.first] ?? _kNeutral)
+        : _kNeutral;
+
+    final bg = primary.withValues(alpha: 0.30);
+
+    return Transform.rotate(
+      angle: rotationDeg * math.pi / 180,
+      child: Container(
+        padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
+        decoration: BoxDecoration(
+          color: bg,
+          borderRadius: BorderRadius.circular(3),
+          boxShadow: const [
+            BoxShadow(
+              color: Color(0x33000000),
+              blurRadius: 4,
+              offset: Offset(0, 2),
+            ),
+          ],
+          border: Border.all(
+            color: primary.withValues(alpha: 0.35),
+            width: 1,
+          ),
+        ),
+        child: Row(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            Container(
+              width: 14,
+              height: 14,
+              alignment: Alignment.center,
+              decoration: BoxDecoration(
+                color: _U_BLUE,
+                borderRadius: BorderRadius.circular(3),
+              ),
+              child: const Text(
+                'U',
+                style: TextStyle(
+                  fontWeight: FontWeight.w800,
+                  fontSize: 10,
+                  height: 1.0,
+                  color: Colors.white,
+                ),
+              ),
+            ),
+            const SizedBox(width: 6),
+            if (lines.isNotEmpty)
+              ...lines.take(maxLinesShown).expand((line) => [
+                    _LineChip(line: line),
+                    const SizedBox(width: 4),
+                  ]),
+          ],
+        ),
+      ),
+    );
+  }
+
+  List<String> _resolveLines() {
+    if (lat == null || lon == null) return const [];
+    final nearest = _nearestStation(stations, lat!, lon!);
+    return nearest?.lines ?? const [];
+  }
+}
+
+class _LineChip extends StatelessWidget {
+  const _LineChip({required this.line});
+  final String line;
+
+  @override
+  Widget build(BuildContext context) {
+    final color = kUbahnLineColors[line] ?? _kNeutral;
+    final on = _onColor(color);
+    return Container(
+      padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 2),
+      decoration: BoxDecoration(
+        color: color,
+        borderRadius: BorderRadius.circular(999),
+      ),
+      child: Text(
+        line,
+        style: TextStyle(
+          color: on,
+          fontSize: 10,
+          fontWeight: FontWeight.w700,
+          height: 1.0,
+          letterSpacing: 0.2,
+        ),
+      ),
+    );
+  }
+}
+
+Color _onColor(Color bg) {
+  return ThemeData.estimateBrightnessForColor(bg) == Brightness.dark
+      ? Colors.white
+      : const Color(0xFF111111);
+}
+
+const _U_BLUE = Color(0xFF1E88E5); // Vienna U sign-ish blue
+const _kNeutral = Color(0xFF9E9E9E);
+
+// Official-ish line colors
+const Map<String, Color> kUbahnLineColors = {
+  'U1': Color(0xFFE20613), // red
+  'U2': Color(0xFFA762A3), // purple
+  'U3': Color(0xFFF29400), // orange
+  'U4': Color(0xFF009640), // green
+  'U5': Color(0xFF63318F), // violet (future)
+  'U6': Color(0xFF8D5B2D), // brown
+};
+
+class UbahnStation {
+  const UbahnStation(this.name, this.lat, this.lon, this.lines);
+  final String name;
+  final double lat;
+  final double lon;
+  final List<String> lines; // e.g., ['U1','U3']
+}
+
+UbahnStation? _nearestStation(
+  List<UbahnStation> stations,
+  double lat,
+  double lon,
+) {
+  if (stations.isEmpty) return null;
+  UbahnStation best = stations.first;
+  double bestD = _haversine(best.lat, best.lon, lat, lon);
+  for (var i = 1; i < stations.length; i++) {
+    final s = stations[i];
+    final d = _haversine(s.lat, s.lon, lat, lon);
+    if (d < bestD) {
+      best = s;
+      bestD = d;
+    }
+  }
+  return best;
+}
+
+double _haversine(double lat1, double lon1, double lat2, double lon2) {
+  const R = 6371000.0;
+  final dLat = (lat2 - lat1) * (math.pi / 180.0);
+  final dLon = (lon2 - lon1) * (math.pi / 180.0);
+  final a = math.sin(dLat / 2) * math.sin(dLat / 2) +
+      math.cos(lat1 * (math.pi / 180.0)) *
+          math.cos(lat2 * (math.pi / 180.0)) *
+          math.sin(dLon / 2) *
+          math.sin(dLon / 2);
+  final c = 2 * math.atan2(math.sqrt(a), math.sqrt(1 - a));
+  return R * c;
+}
+
+// Compact central sample; swap in full dataset when ready
+const List<UbahnStation> kViennaStationsSample = [
+  UbahnStation('Stephansplatz', 48.2084, 16.3731, ['U1', 'U3']),
+  UbahnStation('Karlsplatz', 48.2000, 16.3690, ['U1', 'U2', 'U4']),
+  UbahnStation('Schwedenplatz', 48.2111, 16.3776, ['U1', 'U4']),
+  UbahnStation('Praterstern', 48.2169, 16.3909, ['U1', 'U2']),
+  UbahnStation('Schottenring', 48.2152, 16.3720, ['U2', 'U4']),
+  UbahnStation('Volkstheater', 48.2078, 16.3604, ['U2', 'U3']),
+  UbahnStation('Museumsquartier', 48.2026, 16.3614, ['U2']),
+  UbahnStation('Westbahnhof', 48.1967, 16.3378, ['U3', 'U6']),
+  UbahnStation('Wien Mitte/Landstraße', 48.2070, 16.3834, ['U3', 'U4']),
+  UbahnStation('Spittelau', 48.2409, 16.3585, ['U4', 'U6']),
+  UbahnStation('Längenfeldgasse', 48.1848, 16.3299, ['U4', 'U6']),
+  UbahnStation('Erdberg', 48.1907, 16.4196, ['U3']),
+  UbahnStation('Kaisermühlen VIC', 48.2348, 16.4130, ['U1']),
+  UbahnStation('Floridsdorf', 48.2570, 16.4030, ['U6']),
+  UbahnStation('Ottakring', 48.2120, 16.3080, ['U3']),
+];