Reflective Warning Flag for Disabled Vehicle Visibility
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Solution Overview
Problem
Existing hazard warning devices for disabled vehicles on roadways are inadequate in enhancing visibility, particularly at night and during low-light conditions, as they fail to effectively alert oncoming traffic to the presence of the disabled vehicle.
Innovation Solution
A warning flag with light reflecting properties, designed to be positioned on the disabled vehicle, utilizing reflective strips and patches that meet DOT C2 specifications, combined with adjustable fastening straps for secure attachment, to maximize visibility through light reflection from oncoming headlights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional hazard warning devices are used, then the device structure remains simple, but the visibility enhancement capability is insufficient particularly at night
Solution Approach 1:
The patent applies parameter changes by incorporating light-reflective materials with specific reflectivity characteristics into the warning flag. The reflective strips and patches are designed to reflect headlights and other light sources back toward oncoming traffic, dramatically increasing the flag's visibility at night without requiring active light sources or complex electronic systems. This passive optical parameter enhancement resolves the contradiction between improved illumination intensity and maintained device simplicity.
Solution Approach 2:
The warning flag is constructed as a composite structure combining the base flag material with integrated light-reflective strips and patches. These composite materials work together to create a multi-functional warning device that maintains daytime visibility through the flag's color and shape while adding nighttime visibility through the reflective properties of the integrated strips and patches, all within a single unified structure.
2Illumination intensity
If a warning flag with reflective properties is added, then the visibility at night is improved, but the device complexity increases
Solution Approach 1:
The patent merges the warning flag function with the light-reflective signaling function into a single integrated device. The reflective strips and patches are not separate attachments but are incorporated directly into the flag structure itself, combining multiple functions (visibility during day and night) into one unified component rather than requiring separate devices for different lighting conditions.
Solution Approach 2:
The warning flag is designed with multi-functionality to serve both daytime and nighttime hazard warning purposes. The base flag provides visual warning during daytime through its size and color, while the integrated reflective strips and patches automatically activate during nighttime by reflecting vehicle headlights, making the single device universally effective across all lighting conditions without requiring additional components.
3Illumination intensity
If the warning flag is made highly visible with large reflective areas, then the alerting capability is improved, but the ease of attachment and adjustment becomes more difficult
Solution Approach 1:
The light-reflective elements are segmented into multiple discrete strips and patches distributed across the flag surface rather than requiring one large continuous reflective area. This segmentation allows the flag to maintain high overall reflectivity and alerting capability while using smaller, more manageable individual components that are easier to attach and position correctly on the vehicle.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution significantly enhances the visibility of disabled vehicles to oncoming traffic both day and night, improving safety by ensuring timely alerting of motorists, thereby reducing the risk of accidents.
Implementation Method 1
The warning flag has light reflecting properties for reflecting light from headlights of oncoming traffic
Data Source
AI summary
A roadway hazard warning assembly for enhancing visibility of a disabled vehicle on a roadway includes a vehicle that has been disabled on the side of a roadway. A warning flag is positionable on the vehicle when the vehicle becomes disabled on the roadway. The warning flag has light reflecting properties for reflecting light from headlights of oncoming traffic. In this way the warning flag can alert the oncoming traffic to the disabled vehicle. A plurality of fastening straps is provided and each of the fastening straps is removably coupled between the warning flag and the vehicle for retaining the warning flag on the vehicle.