Intersection Stop Position Planning for Right-Turn Waiting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing drive planning systems fail to effectively plan a driving operation for a vehicle when turning right at an intersection to wait for an oncoming vehicle traveling straight, as they cannot determine a suitable stop position within the central part of the intersection.
Innovation Solution
A travel assistance system that includes a scene determination device and a drive planning device, which extract and analyze routes and events using GPS, object detection, and traffic rules to determine a driving operation plan, allowing the vehicle to safely stop within the intersection by identifying candidate stop positions based on the relationships between the vehicle's route and other routes and objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle stops before the intersection as per conventional drive planning, then collision avoidance is ensured, but the vehicle cannot wait for oncoming vehicles efficiently and traffic flow is blocked
Solution Approach 1:
The drive planning device performs preliminary analysis of the intersection scene, identifying safe stop positions within the intersection before the vehicle arrives. By pre-determining that a stop position exists within the intersection and calculating the appropriate timing, the system enables the vehicle to stop efficiently without collision while maintaining traffic flow.
2Productivity
If the vehicle stops at the central part of the intersection to wait for oncoming vehicles, then traffic flow is maintained, but conventional systems cannot determine suitable stop positions
Solution Approach 1:
The drive planning device segments the intersection space into multiple candidate stop positions along the vehicle's travel route. By dividing the continuous space into discrete positions and evaluating each for safety and suitability, the system can determine appropriate stop locations within the intersection without requiring overly complex continuous analysis.
Solution Approach 2:
The drive planning device acts as an intermediary between the vehicle control system and the complex intersection environment. It processes scene information from detectors, applies traffic rules and safety criteria, and generates simplified drive plans with specific stop positions, mediating between raw sensor data and actionable control commands.
3Reliability
If the vehicle stops before the intersection, then safety is ensured, but the vehicle cannot make a stop at the appropriate position when turning right
Solution Approach 1:
The drive planning device dynamically adjusts the stop position based on the vehicle's maneuver type. For right-turn maneuvers, it calculates stop positions within the intersection that are appropriate for waiting for oncoming vehicles, whereas for other maneuvers it may select stop positions before the intersection. This dynamic adaptation enables the system to handle diverse maneuver requirements while maintaining safety.
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
A drive planning processor (21) is provided which plans a driving operation plan for a subject vehicle (V1) traveling on a route. The drive planning processor (21) sets one or more candidate stop positions for the subject vehicle (V1) to make a stop, using determination results for relationships between the subject vehicle (V1) and a plurality of events which the subject vehicle encounters in a time-series manner when traveling on a first route. The one or more candidate stop positions are set for respective events. The drive planning processor (21) plans a driving operation plan for a scene which the subject vehicle (V1) encounters using determination results for relationships between the subject vehicle (V1) and the plurality of events which the subject vehicle (V1) encounters at the candidate stop positions.