Driving support apparatus

1. A driving support apparatus, comprising:

a detector configured to detect vehicle surroundings information containing information on an object present near a vehicle and a separation line near the vehicle by using one of light and a radio wave passing through a window section;

a steering support controller configured to execute steering support control of changing a steering angle of the vehicle based on the vehicle surroundings information; and

a cleaning apparatus configured to execute cleaning processing for cleaning the window section when a cleaning request is generated,

wherein the steering support controller is configured to prohibit the cleaning apparatus from executing the cleaning processing when the cleaning request is generated during execution of the steering support control and a predetermined cleaning prohibition condition is determined to be satisfied at least based on the vehicle surroundings information, the predetermined cleaning prohibition condition being satisfied when the vehicle is predicted to be likely to approach the detected object on an assumption that the cleaning processing is executed.

2. The driving support apparatus according to claim 1 , wherein the steering support controller is configured to:

select any one of at least two modes of a first mode and a second mode, based on the vehicle surroundings information, the first mode causing execution of first steering support control, which is one type of the steering support control and is based on an assumption that a driver is touching a steering wheel, the second mode causing execution of second steering support control, which is another type of the steering support control and is not based on the assumption that the driver is touching the steering wheel;

execute the steering support control in the selected one of the at least two modes; and

allow the cleaning apparatus to execute the cleaning processing when a mode of the steering support control is the first mode even in a case where the predetermined cleaning prohibition condition is determined to be satisfied at a time of generation of the cleaning request during execution of the steering support control.

3. The driving support apparatus according to claim 2 , wherein the steering support controller is configured to change the mode of the steering support control from the second mode to the first mode when the mode of the steering support control is the second mode in a case where the cleaning prohibition condition is determined to be satisfied at the time of generation of the cleaning request during execution of the steering support control.

4. The driving support apparatus according to claim 1 , further comprising a dirt detector configured to generate the cleaning request when dirt of the window section is detected,

wherein the dirt detector is configured to determine whether the dirt of the window section is at a predetermined first level representing that an influence on the steering support control is low or a predetermined second level representing that the influence on the steering support control is higher than the influence of the first level, and

wherein the steering support controller is configured to:

select any one of at least two modes of a first mode and a second mode, based on the vehicle surroundings information, the first mode causing execution of first steering support control, which is one type of the steering support control and is based on an assumption that a driver is touching a steering wheel, the second mode causing execution of second steering support control, which is another type of the steering support control and is not based on the assumption that the driver is touching the steering wheel;

execute the steering support control in the selected one of the at least two modes; and

when the cleaning request is generated during execution of the steering support control:

allow the cleaning apparatus to execute the cleaning processing when the predetermined cleaning prohibition condition is determined not to be satisfied in a case where the dirt of the window section is at the first level;

prohibit the cleaning apparatus from executing the cleaning processing when the cleaning prohibition condition is determined to be satisfied in the case where the dirt of the window section is at the first level;

allow the cleaning apparatus to execute the cleaning processing irrespective of whether the cleaning prohibition condition is satisfied when the dirt of the window section is at the second level and a mode of the steering support control is the first mode;

allow the cleaning apparatus to execute the cleaning processing when the cleaning prohibition condition is determined not to be satisfied in a case where the dirt of the window section is at the second level and the mode of the steering support control is the second mode; and

change the mode of the steering support control from the second mode to the first mode when the cleaning prohibition condition is determined to be satisfied in the case where the dirt of the window section is at the second level and the mode of the steering support control is the second mode.