Emergency vehicle preemption system based on global positioning system (GPS), A-star (A~*) algorithm and FPGA

摘要

Majority of the existing emergency pre-emption systems often rely on short range signal such as light, infrared and sound based systems. These typical systems have the limitation to trigger green light to only one intersection at a time. The inability to preempt more than one intersection could in due cause the emergency vehicles to get into cluttered intersection problem which trapped the emergency vehicles from maneuvering to its intended locations. This is due to the leading vehicles in other intersections did not move in accordance with the emergency vehicles routes. In order to alleviate this problem, the author propose a long range preemption system by implementing Global Positioning System (GPS) technology and A-Star (A~*) shortest path algorithm. The calculated route from the emergency vehicle position to the emergency scene is used to preempt each intersection within a set threshold radius. The proposed system is expected to reduce the emergency vehicle response time.