Ministry of Land, Infrastructure and Transport, Guidelines for Railway Congestion Management, 2024

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Hoon Sub So, A study on the Improvement of Congestion by Adjusting the Space for Urban Railway Vehicles, Master’s thesis, 2022

Jae Young Joo, The Study for Improvement Plan of Congestion Criteria in Urban Railway, Master’s thesis, 2015

Se Ho Kim, Ha Gyeom Kim, Ki Min Kim, Jung Chan Yang, Na Ri Yu, Sung Jin Kim, Byeong Hee Roh, Jin Kwak, Notifying System of Subway Passenger States, pp. 1202-1203, 2016

Sang Jun Lee, Seong Jin Yun, Seong Gil Shin, Train Crowdedness Analysis Model for the Seoul Metropolitan Subway : Considering Train Scheduling, The Korea Institute of Intelligent Transport Systems, Vol. 21, No. 3, pp. 1-17, 2022

Gi Su Lee, Gwan Bong Cha, In Young Yoon, A Study on the Improvement of the Congestion Level for Each Car in Urban Railways, pp. 1929-1937, 2008

Gu in Jung, Cheong mo An, Young soo Kim, Kwan hyun Cho, Woo gyo Kim, Sung hoon Han, Kwan soo Kim, Boon sub Shim, Jae sun Seo, Jae sun Oh, Urban Congestion Express Rail Rars Required to Meet the Load Pressure(ASP) and the Displacement Factor Model Configuration Synchronization Scenarios Passengers, pp. 1439-1443, 2014

Young Gyu Kim, Tae Do Kim, Young Su Kim, Suk Heung Lee, Ku In Jung, No Joong Kim, Joung Ae Oh, Sin Min Chang, Urban Rail Passenger Congestion Measurement Practice Tests for Data Validation, pp. 27-32, 2016

Mi Rye Kim, In Ho Cho, Design of Congestion Standardization System Based on IoT, Journal of the Korea Academia-Industrial cooperation Society, Vol. 17, No. 5, pp. 74-79, 2016