Vehicular navigation system
First Claim
1. A vehicular navigation system comprising:
- a branching point determining unit that determines that a branching point is present along a guidance route within a given distance from a guidance intersection;
a deviation determining unit that determines that approaching the branching point, which is determined to be present within the given distance, by using a natural exit lane results in entering a road that is not included in the guidance route, wherein the natural exit lane is included in an exit road exiting from the guidance intersection and exits naturally from the guidance intersection along the guidance route; and
a lane-change guiding unit that suggests before entering the guidance intersection that a lane change be required after passing through the guidance intersection, based on a result determined by the deviation determining unit.
1 Assignment
0 Petitions
Accused Products
Abstract
In a vehicular navigation system, it is determined that a branching point is present along a guidance route within a given distance from a guidance intersection. It is then determined that approaching the branching point by using a natural exit lane results in entering a road that is not included in the guidance route, wherein the natural exit lane is included in an exit road exiting from the guidance intersection and exits naturally from the guidance intersection along the guidance route. Before entering the guidance intersection, it is suggested that a lane change be required after passing through the guidance intersection. Thus, in a case that a lane change is needed just after passing through the guidance intersection, a driver can respond with a sufficient time period.
-
Citations
7 Claims
-
1. A vehicular navigation system comprising:
-
a branching point determining unit that determines that a branching point is present along a guidance route within a given distance from a guidance intersection;
a deviation determining unit that determines that approaching the branching point, which is determined to be present within the given distance, by using a natural exit lane results in entering a road that is not included in the guidance route, wherein the natural exit lane is included in an exit road exiting from the guidance intersection and exits naturally from the guidance intersection along the guidance route; and
a lane-change guiding unit that suggests before entering the guidance intersection that a lane change be required after passing through the guidance intersection, based on a result determined by the deviation determining unit. - View Dependent Claims (2, 3, 4)
-
-
5. A vehicular navigation system comprising:
-
a branching point determining unit that determines that a branching point is present along a guidance route within a given distance from a converging point;
a deviation determining unit that determines that approaching the branching point, which is determined to be present within the given distance, by using a natural exit lane results in entering a road that is not included in the guidance route, wherein the natural exit lane is included in an exit road exiting from the converging point and exits naturally from the converging point along the guidance route; and
a lane-change guiding unit that suggests before entering the converging point that a lane change be required after passing through the converging point, based on a result determined by the deviation determining unit.
-
-
6. A computer program product in a computer-readable medium for use in a vehicular navigation system, the product comprising:
-
instructions for determining that a branching point is present along a guidance route within a given distance from a guidance intersection;
instructions for determining that approaching the branching point by using a natural exit lane results in entering a road that is not included in the guidance route, wherein the natural exit lane is included in an exit road exiting from the guidance intersection and exits naturally from the guidance intersection along the guidance route; and
instructions for then suggesting, before entering the guidance intersection, that a lane change be required after passing through the converging point.
-
-
7. A computer program product in a computer-readable medium for use in a vehicular navigation system, the product comprising:
-
instructions for determining that a branching point is present along a guidance route within a given distance from a converging point;
instructions for determining that approaching the branching point by using a natural exit lane results in entering a road that is not included in the guidance route, wherein the natural exit lane is included in an exit road exiting from the converging point and exits naturally from the converging point along the guidance route; and
instructions for then suggesting, before entering the converging point, that a lane change be required after passing through the converging point.
-
Specification