Driving Assist Speed-Limit Feedback After Traffic Congestion
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Solution Overview
Problem
Conventional driving assistance devices fail to notify drivers when the vehicle speed limit is unintentionally increased during traffic congestion, leading to potential unsafe high-speed travel after the congestion clears.
Innovation Solution
A driving assistance device with a shared switch for adjusting the speed limit and starting to follow a preceding vehicle, equipped with sensors to detect congestion and notify the driver when the speed limit exceeds the pre-congestion setting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single shared switch is used for both increasing the upper limit value and starting the own vehicle following a preceding vehicle, then the device complexity is reduced and ease of operation is improved, but the reliability deteriorates because the driver may unintentionally increase the upper limit value during congestion
Solution Approach 1:
The notification device provides feedback to the driver when the upper limit value has been increased during congestion, alerting them to the unintended change. This feedback mechanism allows the driver to recognize and correct the unintentional speed limit increase, thereby maintaining reliability while using a shared switch.
Solution Approach 2:
The notification device acts as an intermediary between the switch operation and the speed limit change. It mediates by providing information to the driver about the speed limit status, enabling them to make informed decisions and prevent unintended consequences of using the shared switch.
2Ease of operation
If the upper limit value is increased during congestion without notification, then the ease of operation is improved as the vehicle can start moving more quickly after congestion, but the safety deteriorates due to risk of high-speed travel after congestion resolves
Solution Approach 1:
The notification device provides critical feedback to the driver about the current upper limit value status. This feedback enables the driver to adjust their driving behavior accordingly, preventing unsafe high-speed travel while maintaining the ease of quick vehicle restart after congestion through the shared switch mechanism.
Data Source
AI summary
The driving assistance device includes an operation device that is shared for an operation requesting an increase in the upper limit value of the own vehicle speed and an operation requesting the own vehicle to start moving. The processor of the driving assistance device controls the notification device so that information indicating that the upper limit value has increased is provided to the driver when the upper limit value at the time when congestion is resolved is higher than the upper limit value before the congestion occurred.