Roundabout Driving Assist Entrance Positioning
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Solution Overview
Problem
Existing driving assist methods fail to consider the widthwise position of a host vehicle when entering a circulatory roadway in a roundabout, leading to a risk of lane changes that can obstruct other vehicles.
Innovation Solution
A driving assist method and device that assesses whether a roundabout has three or more radial roadways and sets the entrance position of the host vehicle based on the positional relationship between the entrance and exit, minimizing lane changes by calculating a target route and executing driving assist control to optimize the vehicle's position within the circulatory roadway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the host vehicle enters the circulatory roadway without considering widthwise position, then the vehicle can enter the roundabout, but lane changing may be required which obstructs other vehicles
Solution Approach 1:
The system performs preliminary assessment of the widthwise position of the host vehicle in the entrance before entering the circulatory roadway. By evaluating the positional relationship between the entrance and exit in advance, the controller determines the appropriate lane or position to enter, thereby preventing the need for lane changing later and avoiding obstruction to other vehicles.
2Productivity
If the host vehicle changes lanes in the circulatory roadway, then the vehicle can reach the exit, but other vehicles are obstructed
Solution Approach 1:
The controller assesses the widthwise position and positional relationship between entrance and exit before the host vehicle enters the circulatory roadway. This preliminary action enables the vehicle to select the appropriate lane at the entrance, ensuring it can reach the exit without needing to change lanes later, thus avoiding traffic obstruction.
3Device complexity
If the host vehicle does not set entrance position based on exit position, then the control system is simple, but lane changing incidence increases
Solution Approach 1:
The system implements feedback by continuously monitoring the widthwise position of the host vehicle in the entrance and the positional relationship between the entrance and exit. Based on this feedback information, the controller determines the appropriate entrance position and provides guidance to the driver or executes automatic positioning, thereby reducing lane changing incidence while maintaining reasonable system complexity.
Data Source
AI summary
A driving assist method minimizes an incidence of lane changing within a circulatory roadway. In this driving assist method, a recognition assessment processor assesses the travel of a host vehicle, calculates a travel route over which the host vehicle is to travel, and executes a driving assist control based on the travel route. The recognition assessment processor further assesses whether the host vehicle has arrived at a roundabout having a circulatory roadway to which three or more radial roadways are connected. When an assessment has been made that the host vehicle has arrived at the roundabout, a position of a host vehicle entrance and a position of a host vehicle exit are specified. Furthermore, an entrance position is set based on a positional relationship between the host vehicle entrance and the host vehicle exit.