Cadillac 2008 CTS Navigation System Owner's Manual page 53

Use Traffic Information for Guidance
Selecting Use Traffic Information for Guidance will
enable the system to show a pop-up screen notifying
you of a possible quicker route, when driving using
a planned route.
To turn this feature on:
1. Press the CONFIG hard key, then press the
CONFIG key repeatedly until Nav is selected
or press the Nav screen button.
2. Touch the Traffic Information button.
3. Touch the Use Traffic Information for Guidance
button. This button will be highlighted when it
is active.
Alternate Route
When the pop-up display "Detour Available" appears on
the screen to notify you that a possibly quicker route
is available, you can select an alternate route, to detour
around the traffic condition. Press the Yes screen
button and the system will automatically calculate a
new route. This option will only become available when
the traffic icon is red.
XM NavTraffic™ information may not be provided for
the alternate route, depending on what type of road the
system will have you traveling on.
2-37