On-Board Unit Speed Range Calculation for Multi-Intersection Traffic Flow
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Solution Overview
Problem
Traffic signal timing schemes often fail to balance efficiency and safety, leading to unnecessary stops, traffic jams, and potential accidents due to unclear switching times for drivers.
Innovation Solution
An on-board unit (OBU) with wireless communication and processing capabilities receives traffic signal information from multiple intersections, calculates a suggested speed range allowing vehicles to pass through without stopping, and notifies drivers to maintain comfort and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traffic signal timing is designed for efficiency, then traffic flow speed is improved, but vehicle safety is worsened due to vehicles traveling too fast without stops
Solution Approach 1:
The system performs preliminary action by providing drivers with advance information about upcoming traffic signal states and optimal speeds before reaching intersections. The server calculates suggested speeds and transmits them to mobile terminals in advance, allowing drivers to adjust their driving proactively rather than reactively, thus maintaining both speed and safety.
2Reliability
If traffic signal timing is designed for safety, then vehicle safety is improved, but traffic flow efficiency is worsened due to excessive speed reduction
Solution Approach 1:
The system dynamically changes the speed parameter based on real-time traffic signal states and vehicle positions. Instead of imposing fixed speed limits, the server calculates optimal suggested speeds that adapt to current conditions, allowing vehicles to maintain higher speeds when safe and reduce speeds only when necessary, thus balancing safety and efficiency.
3Device complexity
If drivers are not provided with traffic signal timing information, then system complexity is reduced, but driver decision-making capability is worsened leading to dangerous driving conditions
Solution Approach 1:
The system introduces an intermediary server that processes complex traffic signal data and transforms it into simple, actionable suggestions for drivers. The server acts as a mediator between the complex traffic signal控制系统 and the driver, providing processed information about optimal speeds and signal states without requiring the driver to understand or process the underlying complexity.
4Reliability
If vehicles stop frequently at red lights, then traffic signal compliance is improved, but passenger comfort is worsened due to frequent stopping and starting
Solution Approach 1:
The system applies dynamics by providing real-time, adaptive speed suggestions that change continuously based on vehicle position, traffic signal states, and timing. Rather than static speed limits, the suggested speeds dynamically adjust to allow vehicles to pass through multiple intersections without stopping when conditions permit, thereby improving passenger comfort while maintaining signal compliance.
Data Source
AI summary
An on-board unit (OBU) with a driving-assistance function to be installed on a vehicle includes at least one wireless communication unit and a processing unit. The processing unit receives information of at least one first traffic signal and at least one second traffic signal respectively from their RSUs through the at least one wireless communication unit. The first traffic signal is installed at a first intersection, the at least one second traffic signal is installed at a second intersection, and the vehicle is closer to the first intersection than to the second intersection. The processing unit generates a suggested speed range, within which the vehicle may travel to allow the same to pass through the first intersection and the second intersection without stopping, according to the information of at least one first traffic signal and the at least one second traffic and vehicle position information of the vehicle.