Vehicle Travel Plan Signaling for Lane Change Response Timing
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Solution Overview
Problem
Autonomous vehicles cannot effectively communicate their travel plans to non-autonomous vehicles, leading to safety and smooth operation challenges, as non-autonomous vehicles may not be aware of changes in autonomous vehicle behavior, such as lane changes, and lack sufficient time to respond.
Innovation Solution
A travel plan information distribution system that includes a device capable of acquiring positional and road shape information, compiling travel plans, and using wireless communication to notify peripheral vehicles of changes in travel plans at a timing that allows for response, incorporating sensors and a lighting system to indicate changes in travel plans.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If autonomous vehicle notifies peripheral vehicle of travel plan change using inter-vehicle communication, then information transmission is achieved, but response time is insufficient for non-autonomous vehicles to react safely
Solution Approach 1:
The system performs preliminary action by notifying peripheral vehicles of travel plan changes before the autonomous vehicle actually executes the maneuver. The notification is sent at a calculated timing that accounts for the peripheral vehicle's recognition and response time, allowing non-autonomous vehicles to prepare appropriate responses in advance, thus resolving the insufficient response time issue while maintaining complete information transmission.
2Reliability
If autonomous vehicle changes behavior in accordance with peripheral situation, then autonomous vehicle operates safely, but peripheral non-autonomous vehicle cannot take responsive action
Solution Approach 1:
The system implements feedback by continuously monitoring peripheral vehicle responses and using this information to adjust future travel plan notifications. The autonomous vehicle's behavior changes are communicated to peripheral vehicles, and the system observes whether appropriate responsive actions are taken, creating a feedback loop that improves coordination and makes the road environment more predictable for all vehicles involved.
Solution Approach 2:
The autonomous vehicle performs preliminary action by notifying peripheral vehicles of intended behavior changes before executing them. This advance notification allows non-autonomous vehicles to prepare appropriate responsive actions, making the autonomous vehicle's operations safer while enabling peripheral vehicles to respond effectively rather than reacting to unexpected maneuvers.
3Loss of information
If travel plan information is distributed at short intervals, then information freshness is improved, but communication load increases
Solution Approach 1:
The system applies periodic action by distributing travel plan information at optimized intervals rather than continuously. The notification timing is calculated based on the peripheral vehicle's response time requirements, sending updates only when necessary to maintain information freshness. This periodic approach reduces communication load and energy consumption while ensuring that peripheral vehicles receive timely information to respond safely to autonomous vehicle travel plan changes.
Data Source
AI summary
With an object of notifying a peripheral vehicle or a person of a travel plan of an own vehicle at an appropriate timing, and providing a safe automatic driving system, a travel plan information distribution system is characterized by including a travel plan information compilation unit that, based on information output by a positional information and frontal road shape information acquisition unit and a sensor information acquisition unit, compiles travel plan information including a travel plan category and a time at which travel is to be started or a position from which a travel plan is to be started, a wireless communication device that transmits travel plan information to a peripheral vehicle, and a travel plan information distribution control unit that selects and outputs necessary details of travel plan information at a safe and necessary timing.