Mike's Railroad Crossing Forum

a siren site has been made already.

As in like an archive/database? There already is, it's called The Siren Archive and it ain't been updated in years, last I checked:
http://www.jmarcoz.com/sirens/sirenarchive.htm
Probably the closest equivalent would be the various siren maps people've made and maintain, like the Alabama Siren Map (ran by yours truly), for example. Similar/newer attempts at making "siren archives" have largely been unsuccessful, though many sirens can easily be seen on street view and unless there's been massive modifications to 'em, they're generally very easy to tell what they are.

In terms of forums, that's already covered by The Siren Board over on airraidsirens.net.

Alright. Just thought it was a little odd that I could not find a siren site. But I guess I didn’t look hard enough