Every once and a while I re-arrange websites. Inserting new load balancers, adding a new layer to the inbound traffic stack, different web servers, whatever.
Sometimes I need to do the simple thing and force a client to go to a different web page due to infrastructure changes. This is the easiest way I have found to get that done.
<meta http-equiv="refresh" content="0; URL='http://new-site.com/location/'" />