Cadillac 2007 XLR Owner's Manual page 295

If you are tuned to a station broadcasting RDS
information, the station's Program Service (PS)
and Program Type (PTY) will replace the station's
frequency on the status line at the top of the
display. After about five seconds, if available, the
PTY will be replaced on the display by the station's
PTY name. The PTY and PTY name may be the
same or different.
If the audio system is tuned to a station that is not
broadcasting RDS information, the station's
frequency will remain on the display. While RDS is
on, the audio system will search for a stronger
station in the network if a station gets too weak for
listening.
The RDS feature relies upon receiving specific
information from RDS stations. These features will
only work when RDS information is available.
TA (Traffic): Touch TA to receive traffic
announcements. The audio system will turn on the
TA display. TA will appear on the display if the
current station broadcasts traffic announcements.
You may also receive traffic announcements
from stations in the network related to the current
station. If the current station does not broadcast
traffic announcements, the audio system will seek
to a station which will. When the audio system
finds a station which broadcasts traffic
announcements, it will stop. If no station is found,
TA will turn off.
While a traffic announcement plays, the audio
system uses TA volume. To increase TA volume,
touch the VOL button on your steering wheel
or use the VOL up or down buttons during
the announcement. See "Voice Guidance Volume
Settings" under Setup Menu on page 243 for
more information.
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