diff --git a/app/views/layouts/site.html.erb b/app/views/layouts/site.html.erb
index 65a8da7ec..8b2299c17 100644
--- a/app/views/layouts/site.html.erb
+++ b/app/views/layouts/site.html.erb
@@ -104,6 +104,10 @@
       </div>
       <% end %>
 
+      <div class="sidebar-notice">
+        Scheduled service notice: OpenStreetMap database will be in read-only mode from April 1st to April 4th <a href='http://blog.osmfoundation.org/2012/03/27/service-schedule-march-april-2012/comment-page-1/'>[more]</a>
+      </div>
+
       <div id="left_menu" class="left_menu">
         <ul>
           <%= yield :left_menu %>