Vehicle controller

1. A vehicle controller configured to control traveling of a vehicle, comprising:

a processor configured to execute:

a nearby-object detection module to detect a nearby object;

a first route computation module to compute a first target travel route specifying a route on which the vehicle is to travel and a speed at which the vehicle is to travel along the route;

a second route computation module to compute a second target travel route specifying a route on which the vehicle is to travel and a speed at which the vehicle is to travel along the route, so as to prompt the vehicle to avoid the detected nearby object; and

a control module to control at least one of a traveling speed and steering of the vehicle so as to prompt the vehicle to travel on one of the first target travel route and the second target travel route, wherein

the first route computation module computes the first target travel route so as to prompt the vehicle to travel with lower energy consumption,

the control module switches the target travel route to the second target travel route when the nearby object to be avoided is detected within a range at a certain distance from the vehicle, and

the second route computation module specifies a plurality of discrete speed limit distributions in which allowable discrete upper limits of a relative speed are designated to areas around the nearby object to be avoided detected by the nearby-object detection module, and computes the second target travel route conforming to the plurality of discrete speed limit distributions.

2. The vehicle controller according to claim 1 , wherein the second target travel route defines a travel route extending over a section shorter than the first target travel route.

3. The vehicle controller according to claim 2 , wherein

when the second route computation module determines that the vehicle traveling on the first target travel route computed by the first route computation module exceeds an allowable discrete upper limit in the first speed limit distribution, the second route computation module corrects the first target travel route for the computation of the second target travel route conforming to the first speed limit distribution, and

when the second route computation module determines that the vehicle traveling on the first target travel route computed by the first route computation module exceeds an allowable discrete upper limit in the second speed limit distribution, the second route computation module corrects the first target travel route for the computation of the second target travel route conforming to the second speed limit distribution.

4. The vehicle controller according to claim 1 , wherein

when the second route computation module determines that the vehicle traveling on the first target travel route computed by the first route computation module exceeds an allowable discrete upper limit in the first speed limit distribution, the second route computation module corrects the first target travel route for the computation of the second target travel route conforming to the first speed limit distribution, and

when the second route computation module determines that the vehicle traveling on the first target travel route computed by the first route computation module exceeds an allowable discrete upper limit in the second speed limit distribution, the second route computation module corrects the first target travel route for the computation of the second target travel route conforming to the second speed limit distribution.

5. The vehicle controller according to claim 4 , wherein the plurality of discrete speed limit distributions are configured so that the allowable discrete upper limits of the relative speed decrease as a lateral distance and a longitudinal distance from the nearby object decrease.

6. The vehicle controller according to claim 4 , wherein the first target travel route is configured so that a midsection of the vehicle in a width direction of the vehicle passes through a midsection in a width direction of lane edges detected by a camera, not using detection information from the nearby-object detection module indicating whether the nearby object is detected within the range at the certain distance from the vehicle.