Alpine X209D Quick Reference Manual page 239

4.3.7 Traffic
You can modify the following settings:
Button Function
Enable or disable the Traffic reception that can receive real-time traffic information.
The rest of the buttons below are all related to the Traffic function and are available
only if the receiver is enabled.
Tap it if you want to use online traffic information to avoid road blocks or
unexpected traffic jams.
If you want to see traffic events (for example closures, accidents, lane restrictions)
on the map, you can choose to show the events with a different color or to display
an icon too. This feature can also be disabled.
Receive information about normal traffic as well, not just special conditions or
events.
Enable or disable historical traffic data and traffic patterns. This locally stored
information can be very useful in normal circumstances but for example on public
vacations it may be better to turn it off in order not to take account of normal
weekday traffic jams.
Set the minimum amount of time that you think is worth saving at the cost of making
a detour.
For example, in the figure below, the orange route shows a traffic event that causes
a 30-minute delay. The blue route is a detour that is 15 minutes longer than the
original route (not counting the traffic jam). If you set the Offer detour feature to 10
minutes, Alpine Navigation System recalculates the route because it saves 15
minutes, which is more than the 10 minutes you set. If you set it to 20 minutes, the
original route is kept because the detour would save you only 15 minutes.
Calculations are based on information received about traffic events.
Enable or disable the manual confirmation of every recalculation due to traffic
events.
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