Autonomous Vehicle Stop Gap Control at Crossing Lanes
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Solution Overview
Problem
Existing autonomous driving control methods may leave other vehicles stranded in intersections, particularly when stopping at crossing lanes, due to fixed inter-vehicle distance settings that do not account for varying stop positions relative to the intersection.
Innovation Solution
An autonomous driving control method that dynamically adjusts the inter-vehicle distance by executing first stop control to shorten the distance when the stop position is ahead of a crossing lane and second stop control to lengthen it when behind, using a vehicle control system with sensors and navigation to determine the optimal stop position and prevent vehicles from being left in the intersection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed basic at-stopping inter-vehicle distance is used, then the stopping safety is maintained, but other vehicles may be left in the intersection when stopping near crossing lanes
Solution Approach 1:
The patent applies dynamics by making the at-stopping inter-vehicle distance variable rather than fixed. The system dynamically adjusts the distance based on the host vehicle's stop position relative to crossing lanes, using forward and rearward stop limit areas to determine whether to apply a first shorter distance or second longer distance. This resolves the contradiction by adapting the stopping distance to specific contextual conditions.
Solution Approach 2:
The patent applies local quality by differentiating the at-stopping inter-vehicle distance based on the local stop position. When the stop position is within forward or rearward stop limit areas of crossing lanes, a first shorter distance is applied; otherwise, a second longer distance is applied. This localized adjustment prevents vehicles from being left in intersections while maintaining safety.
2Productivity
If the at-stopping inter-vehicle distance is shortened to improve traffic flow, then productivity increases, but stopping safety may be compromised
Solution Approach 1:
The patent applies parameter changes by modifying the at-stopping inter-vehicle distance parameter based on stop position conditions. The system changes between a first shorter distance (for improved traffic flow) and a second longer distance (for enhanced safety), using stop limit areas relative to crossing lanes as the decision criterion. This resolves the contradiction by contextually adjusting the distance parameter.
3Reliability
If a longer at-stopping inter-vehicle distance is used, then stopping safety is improved, but traffic efficiency decreases due to increased spacing
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the at-stopping inter-vehicle distance based on the host vehicle's stop position. When the stop position is outside forward and rearward stop limit areas of crossing lanes, a second longer distance is applied for enhanced safety. When within these areas, a first shorter distance is applied to maintain traffic efficiency. This contextual parameter adjustment resolves the contradiction.
Data Source
AI summary
An autonomous driving control method for stopping a host vehicle such that an inter-vehicle distance to a preceding vehicle is a predetermined at-stopping inter-vehicle distance includes: executing first stop control of setting the at-stopping inter-vehicle distance to a first at-stopping inter-vehicle distance shorter than a predetermined basic at-stopping inter-vehicle distance when a stop position of the host vehicle is within a forward stop limit area set in front of a crossing lane, and/or executing second stop control of setting the at-stopping inter-vehicle distance to a second at-stopping inter-vehicle distance longer than the basic at-stopping inter-vehicle distance when the stop position of the host vehicle is within a rearward stop limit area set behind the crossing lane.