Tram testing at Animal Kingdom

Indigo at www.TheDisneyBlog.com reports on a new tram PA system testing at Animal Kingdom:

I encountered a 'test' tram at Disney's Animal Kingdom this weekend. Instead of the old hand-held microphone and PA system, the new tram has a radio linked hands-free headset and extra speakers that project to the loading side of the tram. This allows the RT (rear tram position) to speak over the system even while he is walking through the loading zone. Before he would have had to be standing on the back of the tram to use the speakers. The new side mounted speakers also project the RT's announcements to any gathered crowds so it's more likely that they'll hear the 'final boarding' call and safety messages.