Dynamic LED Lane Markings for Adaptive Traffic Capacity
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Solution Overview
Problem
Conventional road geometrics are static and fail to adapt to changing traffic conditions, leading to traffic congestion, reduced commuting efficiency, and increased air pollution due to fixed lane widths and designs that do not accommodate varying traffic volumes and speeds.
Innovation Solution
A system and method using intelligent transportation systems (ITS) to dynamically change lane widths and numbers through LED in-pavement lane markings, increasing the number of lanes during congestion and reducing them when traffic conditions improve, thereby optimizing traffic capacity and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If static road geometrics are used, then construction and maintenance are simple, but traffic capacity cannot adapt to changing traffic conditions
Solution Approach 1:
The patent applies dynamics by transitioning from static painted lane markings to dynamic LED in-pavement lighting systems that can change lane configurations in real-time based on traffic conditions. The controller receives traffic data and dynamically adjusts the number and width of illuminated lanes, enabling the road geometry to adapt flexibly to varying traffic demands without physical reconstruction.
Solution Approach 2:
The system changes the parameter of lane width and number of lanes by controlling LED illumination patterns. By adjusting which LED modules are activated and their brightness levels, the effective road geometry parameters (lane count and width) are dynamically modified to match traffic conditions, resolving the contradiction between adaptability and complexity.
2Productivity
If lane widths are reduced to increase number of lanes, then traffic capacity increases, but driving safety may be compromised
Solution Approach 1:
The system dynamically adjusts lane widths and numbers based on real-time traffic conditions rather than using fixed narrow lanes. When traffic volume is high, additional lanes are illuminated to increase capacity; when traffic is light, lanes are consolidated to wider configurations that enhance safety. This dynamic adaptation resolves the contradiction by providing both high capacity and safety at different times.
Solution Approach 2:
The controller receives feedback from traffic sensors and monitoring systems to continuously adjust lane configurations. This closed-loop feedback ensures that lane width reductions only occur when traffic conditions warrant them, and that safety margins are maintained by illuminating adequate lane widths when traffic volumes are low, thus resolving the safety-capacity trade-off.
3Productivity
If dynamic lane markings are implemented, then traffic capacity is optimized, but system complexity and cost increase
Solution Approach 1:
The road is divided into multiple segments with independent LED modules that can be controlled individually or in groups. This segmentation allows the complex control function to be distributed across many simple, identical units, making the overall system manageable despite its complexity. Each LED module is a standardized component that can be controlled on/off or dimmed, simplifying the control architecture.
Solution Approach 2:
The LED in-pavement lighting system serves multiple functions: it provides nighttime illumination, marks lane boundaries, dynamically creates additional lanes during congestion, and can display various patterns for different traffic conditions. This multi-functionality consolidates what would otherwise require separate systems into one unified infrastructure, reducing overall complexity while achieving traffic optimization.
Data Source
AI summary
A system and method for providing increased traffic carrying capacity of a road, such as a highway, by modifying an existing roadway from, for example, four lanes to five lanes, to create an additional travel lane. The system and method dynamically changes the width of travel lanes using, for example, embedded pavement lights, or other lighting arrangements, in lieu of traditional painted lane lines. As traffic volumes increase and speeds decrease along the road, an intelligent transport system (ITS) sends a congestion signal to the overhead lane controls and dynamic message signs (DMS) along the entire road segment of interest. The posted speed limits are changed, and the lane markings are controlled to dynamically increase the number of lanes in the road segment to five, for example, of narrower widths until traffic volumes reduce and the number of lanes can be returned to four, for example, with normal speed limits.