Segmented Crosswalk LED Warning System for VRU Detection
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Solution Overview
Problem
Current systems fail to effectively alert both vulnerable road users and vehicle drivers about potential collisions at intersections and crosswalks, particularly as pedestrians may be distracted and lack awareness of approaching vehicles, and existing infrastructure systems do not provide precise location information within crosswalks.
Innovation Solution
A warning system utilizing dedicated short-range communication (DSRC) and embedded LED lights in crosswalks, combined with sensors and audio alerts, to inform drivers of approaching vehicles and vulnerable road users' locations, enabling intelligent intersections to provide localized warnings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If blinking lights are provided at crosswalks to alert drivers, then driver awareness of pedestrians is improved, but the system fails to alert vulnerable road users and provide precise location information
Solution Approach 1:
The crosswalk is divided into multiple illuminated sections that correspond to different locations within the crosswalk. Each section can be independently activated to indicate the specific position of the pedestrian, providing precise location information to drivers while the system as a whole alerts both drivers and pedestrians of the potential collision risk
Solution Approach 2:
The system transitions from a single binary state (light on/off) to multiple spatial states by segmenting the crosswalk into distinct illuminated zones. This dimensional expansion allows the system to communicate both the presence of a pedestrian and their specific location within the crosswalk, resolving the information loss issue
2Difficulty of detecting and measuring
If sensors and communication devices are installed at intersections, then detection capability is improved, but device complexity increases
Solution Approach 1:
The sensor and communication device at the intersection serves multiple functions: detecting pedestrians, determining their locations, communicating with the crosswalk lighting system, and providing alerts to both drivers and pedestrians. By consolidating these functions into a single multi-functional unit, the system achieves improved detection capability without proportionally increasing overall system complexity
Solution Approach 2:
The communication device acts as an intermediary between the sensor and the warning devices (lights and audio alerts). It receives detection data from the sensor, processes the information, and triggers appropriate warnings, thereby simplifying the overall system architecture while maintaining high detection capability
3Reliability
If multiple warning devices are deployed, then safety effectiveness is improved, but manufacturing and installation costs increase
Solution Approach 1:
The system combines multiple warning functions (visual lights and audio alerts) into an integrated warning device that can be controlled by a single communication system. This merging reduces the number of separate components that need to be manufactured and installed individually, thereby reducing overall complexity and cost while maintaining or improving safety effectiveness through coordinated multi-mode warnings
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 safety by accurately alerting both drivers and vulnerable road users of potential collisions, reducing the risk of accidents by providing precise location information and auditory signals for improved awareness.
Implementation Method 1
a plurality of lights, such as a strip of LED lights, is embedded in the concrete along the edges of a crosswalk
Implementation Method 2
a sensor operable for detecting the vulnerable road user in a detection area
Data Source
AI summary
A system for warning vulnerable road users (i.e., pedestrians, cyclists, other, etc) that a vehicle or cyclist is approaching and there may be a potential danger of a collision. The system may also provides an alert to an oncoming vehicle or cyclist of the location of a vulnerable road user within a cross-walk. The system includes intelligent intersections which are enabled with dedicated short range communication (“DSRC”) for detecting vehicles and vulnerable road users. This information may be received by DSRC enabled vehicles and allow the vehicles to warn the drivers of various situations which may be potentially dangerous. A plurality of lights is embedded along the edges of a crosswalk which provides an alert or signal to a vulnerable road user that a vehicle or cyclist is approaching. Sections lights may be illuminated to provide an indication of the location of the vulnerable road user within the cross-walk.