What is the advantage and disadvantage for using plc in traffic light signal?

The advantage of using a Programmable Logic Controller (PLC) in traffic light signals is its flexibility and programmability, allowing for easy updates to traffic patterns and the integration of advanced features, such as adaptive traffic control based on real-time conditions. However, a disadvantage is the potential for increased complexity and maintenance requirements, as PLCs may require specialized knowledge for troubleshooting and programming, which can lead to higher operational costs and downtime if issues arise.