Traffic Sign Lighting With Targeted Beam Control to Limit Glare
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Solution Overview
Problem
Existing illumination systems for traffic signs and pavement markings fail to provide adequate visibility in low-light conditions or inclement weather, often causing glare, lacking flexibility, and excessive power consumption, and are difficult to install or retrofit, with limited integration with traffic management systems.
Innovation Solution
An illumination system comprising a housing with a shroud, a connection assembly, and a lighting element, controlled by an electronic controller, which selectively illuminates target areas using a lens with a cone angle of 30-45 degrees, adjustable mounting, and sensors for ambient conditions, enabling precise and adaptive lighting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional illumination systems are used to illuminate traffic signs and roadway areas, then visibility is improved, but light pollution and glare are caused
Solution Approach 1:
The illumination system directs light selectively to specific target areas such as pavement markings, crosswalks, and traffic signs using adjustable lighting elements and optical directors, rather than illuminating broad areas indiscriminately. This localized illumination approach enhances visibility of critical elements while minimizing light pollution and glare in surrounding areas.
Solution Approach 2:
The system employs electronically controllable lighting elements with adjustable beam directions and intensities that can be dynamically modified based on environmental conditions, traffic patterns, and specific operational requirements. This dynamic control allows optimization of illumination to provide necessary visibility while reducing excessive light output that causes glare and light pollution.
2Illumination intensity
If conventional illumination systems illuminate large areas indiscriminately, then visibility is improved, but energy consumption becomes excessive
Solution Approach 1:
The system concentrates illumination energy on specific target areas such as pavement markings, crosswalks, and traffic signs rather than distributing light across large roadway areas. This focused approach maintains adequate visibility of critical elements while significantly reducing total energy consumption compared to broad-area illumination.
Solution Approach 2:
The illumination system can operate in periodic or on-demand modes, activating lights only when needed based on ambient light sensors, traffic detection, or scheduled operations. This periodic operation reduces energy consumption while maintaining visibility during critical periods.
3Illumination intensity
If existing illumination systems are installed, then visibility enhancement is achieved, but installation and retrofitting become difficult
Solution Approach 1:
The illumination system is designed as modular components including housing, lighting elements, optical directors, and mounting structures that can be independently manufactured and assembled. This segmentation allows for easier manufacturing, quality control, and flexible installation on existing traffic infrastructure without requiring complete system replacement.
Solution Approach 2:
The system incorporates universal mounting mechanisms and standardized connection assemblies that can be adapted to various existing traffic sign structures and poles. This universality simplifies installation and retrofitting by eliminating the need for custom fabrication for each application site.
4Illumination intensity
If conventional illumination systems are used, then basic visibility is provided, but flexibility in adjusting illumination patterns is limited
Solution Approach 1:
The system employs electronically controllable lighting elements with adjustable beam directions, intensities, and patterns that can be dynamically modified based on environmental conditions, traffic patterns, and specific operational requirements. This dynamic control provides substantial flexibility in illumination patterns while maintaining adequate visibility.
Solution Approach 2:
The illumination system incorporates sensors that detect ambient light levels, traffic conditions, and environmental factors, using this feedback information to automatically adjust illumination patterns and intensities. This feedback mechanism enhances flexibility by allowing the system to adapt to changing conditions without manual intervention.
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 of critical pavement markings and traffic signs, minimizes light pollution, and optimizes energy consumption, improving safety and flexibility in various traffic scenarios.
Implementation Method 1
The lighting element includes an optical element configured to direct light from the lighting element to selectively illuminate a target area of a roadway
Data Source
AI summary
The present disclosure provides an illumination system comprising a housing, a connection assembly configured to connect the housing to a support structure such as a traffic sign pole, a lighting element associated with the housing, and a controller configured to control operation of the lighting element. The housing includes a portion defining a cavity that surrounds at least a portion of the lighting element. The lighting element includes an optical element, such as a lens with a specific cone angle, configured to direct light from the lighting element to selectively illuminate a target area of a roadway, such as pavement markings, without illuminating other portions of the roadway. The controller may be configured to control the lighting element based on various inputs including pre-programmed schedules, ambient conditions, or signals from sensors or user input devices.