diff --git a/rpi/main.py b/rpi/main.py
index 5613e4a..95401d4 100644
--- a/rpi/main.py
+++ b/rpi/main.py
@@ -308,9 +308,13 @@ def handle_program1():
         if scroll_node_active:
             bottom_text_iteration_count += 1
             scroll_node_active = False
-            if s['program_vehicles_enabled'] and bottom_text_iteration_count >= config.PROGRAM2_TEXT_ITERATIONS:
-                bottom_text_iteration_count = 0
-                if random.randint(0, 99) < config.PROGRAM2_TRIGGER_CHANCE:
+            force = s.get('force_vehicles', False)
+            if force:
+                with server._lock:
+                    server.state['force_vehicles'] = False
+            if s['program_vehicles_enabled'] and (force or bottom_text_iteration_count >= config.PROGRAM2_TEXT_ITERATIONS):
+                if force or random.randint(0, 99) < config.PROGRAM2_TRIGGER_CHANCE:
+                    bottom_text_iteration_count = 0
                     program2_active = True
                     reset_program2()
                     low_level.fill_pixels(0, 9, config.DISPLAY_MAX_X, config.DISPLAY_MAX_Y, 0, 0, 0)
diff --git a/rpi/server.py b/rpi/server.py
index 9b13244..6663c4f 100644
--- a/rpi/server.py
+++ b/rpi/server.py
@@ -13,6 +13,7 @@ state = {
     'program_top_text_enabled': True,
     'program_bottom_text_enabled': True,
     'program_vehicles_enabled': True,
+    'force_vehicles': False,
 }
 _lock = threading.Lock()
 
@@ -46,6 +47,11 @@ INDEX_HTML = """<!DOCTYPE HTML><html>
     .brightness-row { display: flex; align-items: center; gap: 12px; }
     .brightness-row input[type=range] { flex: 1; accent-color: #4CAF50; }
     .brightness-row span { min-width: 32px; text-align: right; }
+    .btn { display: block; width: 100%; padding: 14px; border: none; border-radius: 12px;
+           font-size: 1em; cursor: pointer; margin-bottom: 12px; transition: 0.2s; }
+    .btn-vehicles { background: #2a4a7f; color: #eee; }
+    .btn-vehicles:hover { background: #3a5a9f; }
+    .btn-vehicles:active { background: #1a3a6f; }
   </style>
 </head>
 <body>
@@ -74,6 +80,7 @@ INDEX_HTML = """<!DOCTYPE HTML><html>
           <span id="brightnessValue">100</span>
         </div>
       </div>
+      <button class="btn btn-vehicles" onclick="forceVehicles()">Force Vehicles Next Cycle</button>
     </div>
   </div>
   <script>
@@ -110,6 +117,12 @@ INDEX_HTML = """<!DOCTYPE HTML><html>
     }
     setInterval(pollDisplay, 100);
 
+    function forceVehicles() {
+      var xhr = new XMLHttpRequest();
+      xhr.open("POST", "/force-vehicles", true);
+      xhr.send();
+    }
+
     function toggle(program, enabled) {
       var xhr = new XMLHttpRequest();
       xhr.open("POST", "/toggle-program", true);
@@ -191,6 +204,13 @@ def handle_toggle():
     return 'OK'
 
 
+@app.route('/force-vehicles', methods=['POST'])
+def handle_force_vehicles():
+    with _lock:
+        state['force_vehicles'] = True
+    return 'OK'
+
+
 @app.route('/program-status', methods=['GET'])
 def handle_status():
     with _lock:
