Driving control method and driving control device

1. A driving control method comprising:

acquiring a destination of an autonomously driven vehicle;

referring to map information including a first map that includes identification information of a travel lane and a second map that does not include the identification information of the travel lane;

when calculating a route from a current position of the autonomously driven vehicle to the destination, calculating the route so as to achieve a predetermined relationship between a first travel cost for a first route that belongs to the first map and a second travel cost for a second route that belongs to the second map;

creating a driving plan for the autonomously driven vehicle to travel along the route;

transmitting a command to execute the driving plan to a controller of the autonomously driven vehicle; and

executing the driving plan by controlling the autonomously driven vehicle to travel along the route,

wherein, when traveling on the first route belonging to the first map, first driving control including lane change driving control is performed, and when traveling on the second route belonging to the second map, second driving control not including lane change driving control but including lane-keeping driving control is performed.

2. The driving control method according to claim 1 , wherein the first travel cost is based on a first distance of the first route and the second travel cost is based on a second distance of the second route.

3. The driving control method according to claim 1 , wherein the first travel cost is based on a first required time obtained from a first distance of the first route and a traveling speed along the first route and the second travel cost is based on a second required time obtained from a second distance of the second route and a traveling speed along the second route.

4. The driving control method according to claim 1 , wherein the route is calculated so that the first travel cost is higher than the second travel cost.

5. The driving control method according to claim 4 , further comprising:

referring to the map information to calculate a cost for a shortest route to the destination; and

when a cost for the calculated route as a whole is higher than the cost for the shortest route by more than a predetermined evaluation cost, reducing a ratio of the first travel cost to the second travel cost.

6. The driving control method according to claim 1 , further comprising:

referring to predefined first driving control that is executable using the first map and predefined second driving control that is executable using the second map; and

when intended driving control is included in the first driving control and is not included in the second driving control, setting a high ratio of the first travel cost to the second travel cost.

7. The driving control method according to claim 1 , wherein, when calculating the route from the current position, a plurality of route candidates to the destination are calculated, and a route candidate having a small number of contact points between the first route and the second route is selected as the route.

8. The driving control method according to claim 1 , wherein the predetermined relationship between the first travel cost and the second travel cost is determined based on a ratio of the first travel cost and the second travel cost set by a driver or passenger of the autonomously driven vehicle.

9. The driving control method according to claim 1 , wherein contact points between the first route and the second route along the route are presented using an output device.

10. The driving control method according to claim 1 , wherein the route is presented using an output device so that the first route and the second route along the route can be identified.

11. The driving control method according to claim 1 , further comprising:

acquiring weather information during travel; and

when the weather information represents a predetermined bad weather that increases a driving load, calculating the route so as to increase a ratio of the first travel cost to the second travel cost.

12. The driving control method according to claim 1 , further comprising:

acquiring traffic information of the route; and

when the traffic information represents a predetermined traffic disturbance that increase a driving load, calculating the route so as to increase a ratio of the first travel cost to the second travel cost.

13. The driving control method according to claim 1 , further comprising:

acquiring accident history information of the route; and

when the accident history information represents an accident history of a predetermined number of times or more, calculating the route so as to increase a ratio of the first travel cost to the second travel cost.

14. A driving control apparatus comprising a control device configured to cause a vehicle controller to execute a driving plan created, the control device being further configured to:

acquire a destination of an autonomously driven vehicle;

refer to map information including a first map that includes identification information of a travel lane and a second map that does not include the identification information of the travel lane, the identification information being stored in a readable manner;

when calculating a route from a current position of the autonomously driven vehicle to the destination, calculate the route so as to achieve a predetermined relationship between a first travel cost for traveling along a first route that belongs to the first map and a second travel cost for traveling along a second route that belongs to the second map;

create the driving plan for traveling along the route;

send a command to execute the driving plan to the autonomously driven vehicle controller; and

execute the driving plan by controlling the autonomously driven vehicle with the vehicle controller to travel along the route,

wherein, when traveling on the first route belonging to the first map, first driving control including lane change driving control is performed, and when traveling on the second route belonging to the second map, second driving control not including lane change driving control but including lane-keeping driving control is performed.