Acura 2011 MDX Navigation System Owner's Manual page 107

Unverified Area Routing
When driving to your destination, you
have the choice of using or not using
"unverified" roads. You make this
choice in the SETUP screen. The next
few pages contain an example of a route
to a destination in an unverified area
explaining the routing differences found
in unverified areas.
With Unverified Area Routing OFF,
the system tries to use verified roads
whenever possible. In this example,
since only verified streets are used, it
created a longer route than necessary.
With Unverified Area Routing ON,
the route is shorter, but consists of
unverified (purple) streets that may not
be accurate. Because the streets are
unverified, there may be errors in street
location, name, or address range.
Additional caution is recommended in
these areas. Always obey posted traffic
restrictions.
Because both routes bypass or use
unverified streets, it is recommended
that you stop and review the map.
Unverified Area Routing "OFF"
2011 MDX
System Setup
Unverified Area Routing "ON"
NOTE:
Unverified roads are shown only when
viewing the map in the 1/20, 1/8, 1/4
mile map scales.
Navigation System 107