Design of Traffic Light Based on Field Programmable Gate Array

Abstract

The use of fixed-time traffic lights for road traffic control has the disadvan-tage of low traffic efficiency. In order to optimize the vehicle traffic at the in-tersection, this paper proposes a design scheme of a real-time control system for road intelligent traffic lights based on FPGA. The system adopts the pol-ling control model, the vehicle detector detects the arrival rate of vehicles, and obtains the corresponding traffic light green time length according to the traffic rules and polling model theory. Using Altera’s Cyclone IV series EP4CE15E22C8 chip as the development platform, a specific design plan is given. The circuit mainly includes program-controlled amplifier module, AD acquisition module, cross-correlation calculation module, serial port trans-mission and Lab-VIEW module. The system can realize the intelligent ad-justment of traffic lights. Different vehicle arrival rates are detected at differ-ent times, so that the corresponding traffic light configuration time length changes accordingly. This intelligent adjustment controls road traffic and makes the main and branch roads coordinate and cooperate, thereby im-proving the traffic efficiency of the intersection