Pedestrian Alert System with Application State Preservation
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Solution Overview
Problem
Users of mobile devices often become so engrossed in their activities that they fail to notice their surroundings, particularly when crossing pedestrian street crossings, leading to potential accidents and injuries due to lack of attention to environmental hazards.
Innovation Solution
A pedestrian alert system on mobile devices, such as smartphones and tablets, uses location sensing and map data to detect proximity to pedestrian crossings, providing visual, auditory, or haptic alerts that suspend device operations temporarily, requiring users to acknowledge the alert before resuming activities, and can automatically dismiss once the user has traversed the crossing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system provides visual, auditory, or haptic alerts to redirect user attention to surroundings, then safety at pedestrian crossings is improved, but user convenience and continuity of device activities deteriorate
Solution Approach 1:
The system takes a snapshot of the application state before suspending operations, preserving the user's progress. This preliminary action ensures that when the alert is dismissed, the application can resume from the exact point it was interrupted, maintaining continuity and reducing the perceived disruption to the user experience.
Solution Approach 2:
The system provides advance warning alerts before the user reaches the pedestrian crossing, giving them time to prepare and shift attention to surroundings. This cushioning approach allows users to gradually transition from device engagement to environmental awareness, reducing the shock of sudden interruption while maintaining safety.
2Reliability
If the system suspends application operations to display alerts, then user awareness of surroundings is improved, but application productivity and response time deteriorate
Solution Approach 1:
The system dynamically adjusts the suspension duration based on the user's interaction with the alert. If the user manually dismisses the alert, operations resume immediately. If the user remains engaged with the device, the system automatically dismisses the alert after detecting continued interaction, ensuring that productivity is restored as quickly as possible while maintaining safety awareness.
Solution Approach 2:
The system preserves the application state in memory during the brief suspension period, allowing operations to resume seamlessly without losing any computational progress. This maintains continuity of useful action by ensuring that the application can pick up exactly where it left off, minimizing the effective impact on productivity.
3Reliability
If the system requires explicit user action to dismiss alerts, then safety reinforcement is improved, but user effort and interaction complexity increase
Solution Approach 1:
The system monitors user interaction with the device during alert suspension and automatically dismisses the alert when it detects that the user has finished crossing the street or has re-engaged with the device. This self-service approach reduces the burden on the user by eliminating the need for manual dismissal actions in many cases, while still maintaining the safety reinforcement of requiring some form of user response.
Data Source
AI summary
A pedestrian alert system supported on a mobile device such as a smartphone, tablet computer, or a wearable computing device which is employed by a user to engage in various activities, is configured to provide visual, auditory, or haptic alerts when the system uses location sensing and map data to determine the user's proximity to a pedestrian street crossing. The alert attracts the user's attention by having the user perform an explicit action to dismiss the alert before being able to continue with the activities on the device. Operations are suspended for applications rendering content on the device display (e.g., a touch screen), user inputs are disabled, and the display may be blurred, dimmed, obscured, or otherwise deactivated. The pedestrian alert system can take a snapshot of application state prior to suspension so that the applications can gracefully resume operations without disruption once the alert is manually or automatically dismissed.