Design and Construction of Automatic Railway Crossing Gate Control Using Proximity and Infrared Sensors Based on Omron CP1E E30-SDRA PLC. WSIS [Internet]. 2024 Sep. 25 [cited 2025 Apr. 15];2(09):1732-9. Available from: https://wsj.westsciences.com/index.php/wsis/article/view/1271