Pontiac 2003 Aztek Owner's Manual page 230

TRAF (Traffic): TRAF will appear on the display if the
tuned station broadcasts traffic announcements. To
receive the traffic announcement from the tuned station,
press this button. Brackets will be displayed around
TRAF and when a traffic announcement comes on the
tuned radio station you will hear it.
If the current tuned station does not broadcast traffic
announcements, press this button and the radio
will seek to a station that does. When the radio finds a
station that broadcasts traffic announcements, it will
stop. Brackets will be displayed around TRAF and when
a traffic announcement comes on the tuned radio
station you will hear it. If no station is found, NO
TRAFFIC will appear on the display.
For DAB (Canada only, if your radio is equipped with
DAB), when the TRAF button is pressed, DAB does not
seek to a station that broadcasts traffic. DAB only
checks the current frequency for traffic support.
Traffic Interrupt Feature: Your radio can interrupt the
play of a CD, or XMTM, or DAB station. Press the
TRAF button. The radio will seek to a station that
broaddcasts traffic announcements. When the radio
finds a station that broadcasts traffic announcements, it
will stop. Brackets around TRAF will appear on the
display. When a traffic announcement comes on
the station that was found, you will hear it. When the
traffic announcement is over, the radio will resume play
of the CD, or XMTM, or DAB station. If no station is
found, NO TRAFFC will appear on the display.
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