Remote Driving Risk Mitigation at Intersections Using Stop-Location Selection
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Solution Overview
Problem
The risk of disturbing traffic flow or causing contact or collision with other vehicles at intersections when the risk mitigation function is activated in a remote-type automated driving system, as it may encounter other traffic participants while guiding the vehicle to a refuge location.
Innovation Solution
A driving control apparatus that sets and selects a target stopping location with reduced encounter points and influence on traffic flow by calculating a risk factor based on encounter points, predicted travel distance, and time, and preferentially choosing paths that minimize risks and avoid obstructing traffic flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle is guided to a refuge location when the risk mitigation function is activated in the vicinity of an intersection, then the risk mitigation function can be executed, but the traffic flow may be disturbed or contact or collision with others in traffic may occur
Solution Approach 1:
The patent applies local quality by making the stopping location selection adaptive to local traffic conditions. The automated operation device evaluates encounter points specific to each candidate stopping location and selects the location with the fewest encounter points, thereby tailoring the risk mitigation action to the local traffic environment rather than applying a uniform stopping procedure
Solution Approach 2:
The patent implements preliminary action by pre-calculating and evaluating multiple candidate stopping locations before actually needing to stop. The automated operation device identifies refuge locations and assesses their encounter points in advance, so that when the risk mitigation function is activated, the vehicle can quickly transition to the pre-evaluated safest location without disturbing traffic flow
2Reliability
If the vehicle stops at a refuge location near an intersection, then the risk mitigation function can be completed, but the stopping may obstruct traffic flow
Solution Approach 1:
The patent applies parameter changes by using the encounter point metric as a decision parameter for selecting stopping locations. By changing the selection criterion from simple proximity to intersection to minimizing encounter points, the system identifies stopping locations that complete the risk mitigation function while having minimal impact on traffic flow
Data Source
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AI summary
A driving control apparatus for a vehicle (1) provided with an automated operation device (10) for executing automated driving by remote monitoring and control has a risk mitigation function RMF that executes risk mitigation control for stopping the vehicle (1) at a target stopping location (S) in a case in which the continuation of remote monitoring and control has become difficult. The automated operation device (10) is configured: to execute a search for target stopping location candidates on the basis of location information about the vehicle (1) and map information during the automated driving in preparation for RMF activation, and in a case in which the RMF is activated in the vicinity of an intersection; to calculate a risk factor (RF) expressing how high a risk is for the vehicle (1) to reach a target stopping location candidate from the current location for each of a plurality of target stopping location candidates including a target stopping location candidate located on a path different from a target path (PA) of the automated driving; and to select, as the target stopping location (S), a target stopping location candidate with the lowest risk factor (RF) from among the plurality of target stopping location candidates.