Dynamic Traffic Signal Priority Control for Emergency Vehicles
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current traffic control methods lack the ability to flexibly manage priorities for various types of vehicles at intersections, such as ambulances, police vehicles, and public transport, leading to inefficiencies in emergency responses and passenger transport.
Innovation Solution
A traffic control method and apparatus that generates and transmits signal priority request packets to control traffic signal machines, allowing for dynamic priority management based on vehicle type and location, enabling efficient priority passage at intersections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional fixed traffic signal control is used, then traffic flow stability is maintained, but emergency vehicles and public transport cannot receive priority passage
Solution Approach 1:
The traffic signal control system transitions from fixed timing to dynamic adjustment based on real-time vehicle requests. The controller receives priority passage requests from road side units, determines the requesting vehicles' types and locations, and dynamically modifies signal phases and timings to grant priority passage, thereby reducing emergency response time while maintaining overall traffic flow stability.
Solution Approach 2:
The system implements a feedback mechanism where road side units detect vehicles requiring priority passage, transmit requests to the traffic signal controller, and the controller adjusts signal phases based on this feedback. The controller determines vehicle types and locations from the requests and modifies signal timing accordingly, creating a closed-loop system that responds to real-time traffic conditions.
2Productivity
If priority passage is granted to emergency vehicles, then emergency response efficiency improves, but traffic flow at intersection may be disrupted
Solution Approach 1:
The system performs preliminary determination of the requesting vehicle's type and location before executing the priority passage grant. The controller analyzes the priority passage request to identify the vehicle category (emergency, public transport, etc.) and its position relative to the intersection, then pre-calculates the appropriate signal phase adjustment to minimize disruption to overall traffic flow while ensuring the priority vehicle receives timely passage.
3Adaptability or versatility
If multiple types of vehicles request priority passage simultaneously, then comprehensive priority management is achieved, but control complexity increases
Solution Approach 1:
The system segments the priority passage control by vehicle type and location. The controller processes priority requests by first determining the vehicle type (emergency, public transport, etc.) and location (entrance direction, distance to intersection), then applies different control strategies for different segments. This segmentation allows the system to manage multiple simultaneous requests from different vehicle types at different locations without overwhelming complexity, as each segment can be handled with standardized procedures.
Data Source
AI summary
Embodiments of this application disclose a traffic control method and apparatus, a device, and a storage medium, and relate to the field of computer technologies. The method includes: generating a first signal priority request packet, the first signal priority request packet including N signal priority requests; transmitting the first signal priority request packet; and receiving a first signal priority response packet returned for the first signal priority request packet, the first signal priority response packet including N signal priority responses for the N signal priority requests, and the N signal priority responses including information configured for indicating a first road traffic signal control machine of a first intersection to control a traffic management and control device of the first intersection.