Traffic Light Speed Induction for Vehicle Green-Light Crossing
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Solution Overview
Problem
Current vehicle speed adjustment methods are inadequate for anticipating traffic light conditions ahead, leading to frequent vehicle stopping and congestion, as well as increased energy consumption due to low speed crossing and prolonged time at intersections.
Innovation Solution
A vehicle speed induction method and system that determines the position of traffic light junctions using GPS, calculates effective time intervals, and sets induction speed intervals based on distance and traffic light parameters to ensure vehicles pass through during green-light periods, thereby avoiding stops and reducing energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If vehicle speed is adjusted based on current road conditions and driver experience only, then driver autonomy is maintained, but vehicle stopping and congestion occur at traffic light junctions
Solution Approach 1:
The system performs preliminary action by obtaining traffic light information and calculating speed adjustment recommendations in advance, before the vehicle reaches the traffic light junction. This allows the driver to adjust speed proactively rather than reactively, maintaining autonomy while avoiding stops that would congest traffic.
Solution Approach 2:
The system implements feedback by continuously monitoring vehicle position, speed, and traffic light status, then providing real-time speed adjustment recommendations to the driver. This closed-loop feedback enables the driver to make informed decisions that improve traffic flow while maintaining operational control.
2Adaptability or versatility
If vehicle speed is adjusted at a place very close to the traffic light, then speed adjustment can be made based on current conditions, but adjustment time is short and congestion occurs
Solution Approach 1:
The system calculates the distance to the traffic light junction and determines speed adjustment recommendations in advance, giving the driver sufficient time to adjust speed smoothly rather than making abrupt changes at the last moment. This preliminary calculation maintains flexibility while eliminating time pressure.
3Reliability
If vehicle stops at traffic light junction, then vehicle can wait for green light, but re-acceleration causes low crossing speed and high energy consumption
Solution Approach 1:
The system calculates whether the vehicle can reach the traffic light junction during the green light period by determining effective time intervals and induction speed intervals in advance. If feasible, the system recommends maintaining speed to pass through without stopping, thereby ensuring traffic light compliance while avoiding the energy waste of stopping and re-accelerating.
4Reliability
If vehicle crosses traffic light at low speed after stopping, then vehicle can safely navigate the junction, but crossing time is long and energy consumption increases
Solution Approach 1:
The system provides real-time feedback to the driver about the recommended speed to maintain for safe and efficient crossing. By monitoring vehicle speed, position, and traffic light timing, the system guides the driver to cross at optimal speeds that balance safety with time efficiency, preventing both unsafe high-speed crossing and wasteful low-speed crossing.
Data Source
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AI summary
A traffic light-based vehicle speed inducing method and system, and a vehicle. The vehicle speed inducing method comprises: obtaining the position of an intersection ahead having traffic lights, the current position of vehicle travelling, the current moment, and a time parameter of the traffic lights (100); determining the distance between the vehicle and the traffic light intersection according to the position of the traffic light intersection and the current position of vehicle travelling (200); determining an effective time interval for the vehicle to continue travelling according to the time parameter of the traffic lights and the current moment of vehicle travelling (300); and determining an induction speed range of vehicle travelling according to the distance and the effective time interval (400). A driver can pass through the traffic light intersection during the green light when driving at a speed within the induction speed range, thereby avoiding congestion caused by parking at the traffic light intersection ahead..