Driving assistance device

A driving assistance device that assists vehicle deceleration driving, comprising:

• a target deceleration pattern generating unit configured to generate a target deceleration pattern for the deceleration driving;
• a signal information acquiring unit configured to acquire the information about a time for changing of a traffic signal on a road on which the vehicle travels;
• and
• a start position determining unit configured to determine a deceleration start point where the deceleration driving starts on the basis of the target deceleration pattern,
• wherein the target deceleration pattern generating unit selects a position corresponding to the traffic signal which changes to a stop signal before the vehicle passes through as a target stop position, on the basis of the information about the time for changing of the traffic signal,
• the target deceleration pattern generating unit generates the target deceleration pattern including a first deceleration pattern in which deceleration in a section from a predetermined position to the target stop position is set and a second deceleration pattern in which deceleration in a section to the predetermined position is set to be more than the deceleration in the first deceleration pattern,
• the target deceleration pattern generating unit changes the predetermined position so as to be away from the target stop position when it is determined that the traffic signal corresponding to the target stop position is green at a time when the vehicle reaches the deceleration start point, on the basis of the information about the time for changing of the traffic signal corresponding to the target stop position, and changes the target deceleration pattern on the basis of the changed predetermined position, and
• the start position determining unit changes the deceleration start point on the basis of the changed target deceleration pattern.

A driving assistance device that assists vehicle deceleration driving, comprising:

• a target deceleration pattern generating unit configured to generate a target deceleration pattern for the deceleration driving;
• a start position determining unit configured to determine a deceleration start point where the deceleration driving starts on the basis of the target deceleration pattern;
• and
• a driving force control unit configured to control driving force of the vehicle,
• wherein the target deceleration pattern generating unit generates the target deceleration pattern including a first deceleration pattern in which deceleration in a section from a predetermined position to a target stop position is set and a second deceleration pattern in which deceleration in a section to the predetermined position is set to be more than the deceleration in the first deceleration pattern, and changes the predetermined position on the basis of the number of times the driving force control is cancelled.