Honda 2006 Civic Sedan Owner's Manual page 7

Verified streets (dark colored)
When These roads are found within metropolitan areas, and
displayed include interstate freeways and major roads
connecting cities.
Street color Shown on daytime map screen as black or red, such
as interstate freeways.
Map Quality The database vendor has verified these streets.
Information like turn restrictions, average speed, and
whether it is a one way street have been gathered and
used when creating your route to a destination.
Routing While driving to your destination, the displayed route
differences line is solid blue. The system provides voice and map
guidance to your destination.
Cautions There are no pop-up boxes urging extra caution
during a route. However, because roads constantly
change, you are urged to use common sense, and
always obey posted traffic restrictions.
Guidance Voice guidance issues maneuvers such as "In a half
voice mile make a right turn."
Time and The time and distance "to go," displayed while on
distance route to a destination, is based on the average speed
"to go" and distance for the roads used for your route.
Unverified streets (light colored)
These roads are found in rural areas, and typically include
residential streets away from the center of a town.
Shown on the daytime map screen as light brown.
These streets have not been verified by the database vendor. The
system does not contain information about one-way streets, turn
restrictions, or the road's average speed. They are shown on the
map for reference and can have errors in map location, naming,
and address range.
Your route line is either a blue dotted "vector line", or a dashed
pink/blue line. For information on selecting this option, and the
routing differences, see Unverified Area Routing on page 77.
Regardless of whether the user chooses route guidance, there
are cautionary screens before and during the route urging the
user to be extra cautious, and obey all traffic restrictions (see
Unverified Area Routing on page 77).
The suffix "if possible" is added to each guidance maneuver.
For example: "In a half mile make a right turn, if possible."
Because the average speed of these roads is not known, the time
and distance "to go" is based on a fixed average speed of
25 mph for these roads.
Introduction
Navigation System 7