Traffic Signal with Downward Tilt and Motion Patterns
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Solution Overview
Problem
Existing traffic control signals are not color-blind friendly, have a high profile, are not aerodynamic, use excess material and LEDs, are difficult to visualize at sunrise and sunset, and are affected by environmental factors, requiring additional sensors and fixtures.
Innovation Solution
A traffic control signal with a single light-emitting area angled downward, using motion and color patterns to differentiate between red, yellow, and green, and incorporating sensors in a central location for improved visibility and functionality, including a processor to control LED emissions for impaired color vision drivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional multi-color traffic signals are used, then traffic control functionality is provided, but color-blind individuals cannot distinguish between colors (red vs green)
Solution Approach 1:
The patent uses motion patterns (sweeping hand movements) instead of color changes to convey traffic signal information. The sweeping hand moves in different patterns for different traffic phases, providing tactile visual cues that are independent of color perception.
Solution Approach 2:
The patent introduces dynamic motion patterns to the static traffic signal display. The sweeping hand moves dynamically across the display area, creating time-varying visual patterns that convey traffic phase information through motion rather than color.
2Ease of manufacture
If traffic signals are positioned at 90° from road surface, then standard mounting is achieved, but visibility at sunrise and sunset is reduced
Solution Approach 1:
The patent changes the mounting angle parameter of the traffic signal from the standard 90° to a downward tilt angle. This parameter change optimizes the signal's visibility during sunrise and sunset by positioning the display away from the horizon where solar glare occurs.
3Reliability
If sensors are mounted externally on traffic signals, then traffic detection is achieved, but additional fixtures and complexity are required
Solution Approach 1:
The patent combines the sensor mounting function with the existing traffic signal structure. Sensors are integrated into the housing or mounting bracket of the traffic signal itself, eliminating the need for separate external sensor fixtures and reducing overall system complexity.
Solution Approach 2:
The traffic signal structure is designed to serve multiple functions: displaying traffic control signals and housing/mounting sensors for traffic detection. This multi-functionality reduces the need for separate dedicated sensor fixtures.
4Stability of the object's composition
If traditional traffic signal structure is used, then standard design is maintained, but material usage and profile height are excessive
Solution Approach 1:
The patent extracts and eliminates unnecessary structural elements from traditional traffic signals. By removing redundant housing components, visors, and excessive mounting structures, the design achieves the required structural integrity with significantly reduced material usage.
Solution Approach 2:
The patent applies structural reinforcement only where necessary rather than uniformly throughout the entire housing. Localized strengthening at critical stress points maintains structural integrity while minimizing overall material consumption.
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
Enhances visibility for color-impaired individuals and improves sensor placement, reduces material usage, and shields from weather-related issues, providing better visibility and functionality during adverse conditions.
Implementation Method 1
The light emitting area includes light emitting diodes that are configured to emit light of the colors red, green, and yellow
Data Source
AI summary
A traffic control system has a single light emitting area with a central location in which sensors are optionally positioned. The traffic control system is angled downward towards a roadway for improved visibility and improved aiming of the sensors. The single light emitting area selectively illuminates red, yellow, or green light to signal to the vehicle drivers when they can safely move through the intersection or when they should stop. The light emitting area presents a moving dark area or bar during display of green to convey proceed to those that are color impaired. A sweep hand as in a clock is displayed during the caution state to convey the length of time that the caution state will remain (yellow color is displayed) and also to convey the state of caution to those that are color impaired.