Vehicle Stop Position Control Near Exits While Following Traffic
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Solution Overview
Problem
Vehicles occasionally block the passage of following vehicles at exits like intersections without traffic lights or shop entrances, even when there are no right-turn oncoming vehicles, due to stopping after passing through the exit.
Innovation Solution
A driving assist device that uses map information and recognition sensors to predict the stop position of a leading vehicle and adjust the following vehicle's stop position based on the predicted stop position, considering distance and exit width to prevent blocking the passage of following vehicles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle stops after passing through an exit, then the vehicle can maintain its following distance from the leading vehicle, but it blocks the passage of the following vehicle that wants to enter the exit
Solution Approach 1:
The driving assist device predicts the stop position of the leading vehicle in advance before the own vehicle reaches the exit. Based on this prediction, it determines whether to stop before or after the exit, preventing the blocking of following vehicles before the situation arises. This preliminary prediction and decision-making resolves the contradiction by avoiding the harmful blocking effect while maintaining reliable passage.
2Object-generated harmful factors
If the vehicle stops before the exit, then the passage of following vehicles is maintained, but the vehicle may unnecessarily interrupt its own flow and reduce productivity
Solution Approach 1:
The system dynamically changes the stop position parameter based on predicted conditions. When the leading vehicle is likely to stop far from the exit, the own vehicle stops after the exit to maintain flow efficiency. When the leading vehicle is likely to stop close to the exit, the own vehicle stops before the exit to avoid blocking following vehicles. This parameter adjustment resolves the contradiction between preventing blocking and maintaining productivity.
3Device complexity
If the vehicle relies solely on map information to detect exits, then the system is simple, but it lacks precision in determining exact exit positions and widths
Solution Approach 1:
The driving assist device merges multiple information sources: map information for basic exit detection, recognition sensors for verifying exit positions and detecting widths, and recognition results for identifying exit types (e.g., intersections, parking entrances). This combination resolves the contradiction by achieving high measurement precision while keeping the system integrated and manageable rather than overly complex.
4Measurement precision
If the vehicle uses multiple sensors and map information to accurately detect exits, then exit detection precision is improved, but the device complexity increases
Solution Approach 1:
The recognition sensor serves multiple functions: detecting exit positions, measuring exit widths, identifying exit types, and providing verification data for map information. This multi-functionality resolves the contradiction by achieving high detection precision through a single versatile sensor system rather than requiring multiple specialized sensors, thereby reducing overall system complexity while maintaining accuracy.
Data Source
AI summary
A driving assist device for a vehicle includes: a storage device that stores map information; and a processor that executes a process of following up a leading vehicle. In the process of following up the leading vehicle, the processor detects an exit of a traveling road, based on at least one of the map information and a recognition sensor equipped in the vehicle, the exit being positioned forward of the vehicle on the traveling road, and decides a vehicle stop position of the vehicle at the vicinity of the exit, based on a predicted vehicle stop position of the leading vehicle, when an intention to enter the exit is detected from a following vehicle behind the vehicle, the predicted vehicle stop position of the leading vehicle being estimated short of the exit.