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The increasing complexity of urban transportation systems demands intelligent and measurable navigation methods. Medan City, the capital of North Sumatra Province, has a dense road network with multiple route options that often confuse road users. Dijkstra's Algorithm, developed by Edsger Wybe Dijkstra in 1959, is a greedy-based computational approach proven effective for solving the shortest path problem on non-negative weighted graphs. This study applies Dijkstra's Algorithm to determine the shortest route from Medan Railway Station to Universitas Negeri Medan (UNIMED). The road network was modeled as an undirected weighted graph with 15 nodes and 16 edges, where edge weights represent actual road distances measured via Google Maps. The graph has a density of 0.152, confirming its sparse graph characteristic. Three alternative routes were identified and analyzed. The algorithm was implemented in Python 3 using the heapq module as a priority queue. Results show that the optimal route is A → B → C → E → F → M → N → O via Jl. M.T. Haryono, Jl. Aipda KS Tubun, Jl. Madong Lubis, and Jl. Prof. H.M. Yamin, with a total distance of 6.64 km. This achieves 99.1% accuracy compared to Google Maps, with a deviation of only 0.06 km. The optimal route is 6.25% more efficient than Alternative Route 1 (7.30 km) and 11.9% more efficient than Alternative Route 2 (7.54 km). The algorithm executes in under 1 millisecond with time complexity O((V+E) log V). These findings confirm Dijkstra's Algorithm as highly effective for medium-scale urban road network optimization.

This study analyzes the Public Relations communication strategy of PT Kereta Api Indonesia (Persero) Daerah Operasi 8 Surabaya in socializing the Access by KAI digital application to the Surabaya community. Using a descriptive qualitative approach, data were collected through in-depth interviews with PR staff and Railfans Surabaya community members, participatory observation of socialization activities, and documentation of digital publications. Data analysis followed the interactive model of Miles, Huberman, and Saldana (2014). The findings reveal that PR communication strategies are implemented through a synergy of push communication, pull communication, and pass communication, supported by Two-Way Symmetrical Communication principles developed by Grunig and Hunt (1984). Push communication disseminates official information via social media platforms; pull communication attracts audiences through visually compelling and educational content; while pass communication emphasizes two-way engagement that builds public trust and loyalty. The study demonstrates that public engagement, interactive dialogue, and message adaptation to local audience characteristics positively contribute to increasing public understanding and acceptance of the Access by KAI application. The integration of these three strategies creates a holistic communication ecosystem that effectively bridges the gap between digital innovation and user behavior. Future research is recommended to examine similar strategies in other operational regions or employ quantitative approaches to measure adoption levels.

Film is a communication medium capable of conveying moral messages to the public through a series of moving images, usually accompanied by sound. One such medium is the short film. "The waiting room" by Galih Firdaus, a production of PT Kereta Api Indonesia (KAI) released in April 2024 and received positive acclaim for its engaging plot and relevance to the audience's reality. This study aims to analyze the moral message in the film using Charles Sanders Pierce's semiotic theory, which emphasizes three main elements: Representation, Object, and Interpretant. The study used a descriptive qualitative approach with a content analysis method to uncover the moral meanings behind the film's scenes. The results found 15 scenes that explicitly convey moral values, including the importance of open communication within the family, the meaning of simple kindness, valuing togetherness, the commitment of true love, a mother's fortitude, loyalty in waiting, and sincere care. The moral message is constructed through Representation (physical signs such as a bowl of soto), Object (the reality conveyed, such as an apology), and Interpretant (the audience's understanding that the soto symbolizes improving relationships). In conclusion, the film "The waiting room" successfully conveys a strong moral message through a neatly structured narrative.

The COVID-19 pandemic significantly affected the financial performance of PT Kereta Api Indonesia (Persero), as reflected in the shift from profit in 2020 to a substantial pre-tax loss in 2021. This change had direct implications for the company’s tax components, particularly current tax and deferred tax, in accordance with PSAK 46 on Income Taxes. This study aims to analyze the changes in current tax and deferred tax between the two reporting periods and to examine the role of deferred tax benefits in reducing the company’s net loss. The research employs a quantitative descriptive approach with a comparative analysis method using secondary data from the company’s interim consolidated financial statements. The findings indicate that in 2021 the company recognized a deferred tax benefit that converted total income tax into a net tax benefit, thereby reducing the company’s net loss by approximately 15.8 percent. These results demonstrate that deferred tax does not merely arise from temporary differences but can function as an instrument of loss mitigation during periods of financial distress. The implications of this study highlight the importance of accurate application of PSAK 46, especially in times of economic downturn, and emphasize the need for realistic assessments of future taxable profits to ensure the reliability of deferred tax asset recognition.

This study aims to analyze the significant role of leadership, motivation, work discipline, and compensation in improving employee performance at PT Kereta Api Indonesia (Persero) Daop IV Semarang. This research adopts a quantitative associative approach, providing a clear understanding of the key factors that influence employee performance. Data were collected through a Likert-scale questionnaire, which was distributed to 80 respondents who are permanent employees of Daop IV Semarang. The data analysis was carried out using SPSS version 26, which included validity and reliability tests, as well as multiple linear regression, t-test, F-test, and the coefficient of determination (R²). The results reveal that leadership, motivation, work discipline, and compensation all have a positive and significant impact on employee performance. Among these variables, motivation was found to be the most dominant factor influencing performance. This finding suggests that fostering higher motivation and effective leadership can significantly enhance employee performance. This research provides practical implications for PT KAI management to enhance productivity through strengthening discipline culture, implementing fair compensation systems, and promoting participative leadership styles.

Penelitian ini bertujuan untuk mengkaji dampak penutupan perlintasan kereta api Alastuo terhadap peningkatan volume kendaraan dan intensitas kebisingan di kawasan Fly Over Bangetayu, Kota Semarang. Fenomena ini mencerminkan tantangan tata kelola lalu lintas urban akibat perubahan infrastruktur transportasi. Dengan menggunakan pendekatan kualitatif deskriptif, studi ini dilakukan melalui metode studi kasus di lokasi terdampak. Data dikumpulkan melalui wawancara semi-terstruktur, observasi partisipatif, dokumentasi visual, serta pengukuran intensitas kebisingan menggunakan sound level meter pada sembilan titik waktu berbeda selama tiga hari pengamatan. Partisipan meliputi warga sekitar, pengguna jalan, dan petugas lalu lintas. Hasil analisis tematik menunjukkan adanya korelasi positif antara peningkatan volume kendaraan dan intensitas kebisingan, dengan nilai puncak kebisingan mencapai 93,6 dB pada sore hari. Temuan ini menegaskan bahwa perubahan rute akibat intervensi kebijakan infrastruktur dapat menyebabkan beban akustik yang signifikan di jalur alternatif. Penelitian ini memberikan kontribusi pada pemahaman tentang relasi spasial antara kebijakan lalu lintas dan degradasi lingkungan akustik. Implikasi teoretis mengarah pada integrasi studi kebisingan dalam perencanaan transportasi berkelanjutan, sementara implikasi praktis mencakup kebutuhan akan pengaturan lalu lintas yang adaptif serta mitigasi kebisingan melalui vegetasi, jalur alternatif, dan edukasi berkendara. Penelitian lanjutan disarankan melibatkan pendekatan interdisipliner untuk mengevaluasi dampak kebisingan terhadap kesehatan masyarakat secara langsung.

Technological developments have penetrated various sectors of life, including in the transportation and communication lines in Indonesia. KAI Access is a digital service issued by PT Kereta Api Indonesia in the form of an application. This application is present as a strategic innovation to improve the convenience and comfort of customers in accessing various train services, from ticket bookings, schedule information, to cancellations and refunds. However, from the complaint data submitted by customers, there are two biggest problems that are often experienced, namely related to responsiveness and action from KAI Access which is considered slow in handling user complaints and technical problems. When quick response services are not accompanied by concrete settlement actions, customer trust tends to decline. This research is based on service theory with a service quality and excellent service approach, where the variables of responsiveness and action are the main focus in the analysis of customer loyalty. Using a quantitative approach, with data collection techniques in the form of questionnaires, interviews, and literature studies, the respondents in this study were KAI Access users from the Edan Sepur train loving community. The results showed that the action variable had a positive and significant influence on customer loyalty, while the responsiveness variable did not have a significant influence directly. An important conclusion from this study is that in the context of digital applications such as KAI Access, customers prioritize concrete problem solving rather than just quick response. Therefore, PT KAI needs to strengthen concrete actions in handling complaints to increase long-term loyalty. Therefore, PT KAI needs to strengthen concrete actions in handling complaints to increase long-term loyalty, especially in the era of digitalization of public services that continues to grow rapidly.

The Special Region of Yogyakarta (DIY) is known as an important tourist destination, and tourism development requires an increase in both demand and supply sides. Transportation, especially Tugu Yogyakarta Station managed by PT Kereta Api Indonesia (KAI), is an important element in the offer aspect. PT KAI seeks to improve the quality of service by relocating residents from the Bong Suwung area in Gedongtengen District to facilitate the arrangement of the area around the station. This process involves the socialization and execution stages to reduce conflicts with residents. Yogyakarta Mayor Regulation Number 121 of 2020 regulates the role of urban villages in providing protection for the community. This study uses a qualitative approach focusing on policy research with. The research location is in Bong Suwung, Pringgokusuman Village, Gedongtengen Village, Yogyakarta City. Data is collected by observation, interview, and documentation techniques, primary and secondary data are integrated in the context of analysis, informance is determined by propursive sampling. The results of the study show that even though the Village has carried out data collection, socialization, and coordination with related parties, the aspect of economic empowerment for ex-prostitutes is still very minimal. The reluctance of the Village to be more involved in the training and economic empowerment program, on the grounds that the program is not part of the activities of the Yogyakarta City Government, creates a gap in coordination between institutions and hinders the socio-economic recovery of the affected communities.

This study aims to analyze the application of Organizational Theory at PT Kereta Api Indonesia (Persero) in the context of organizational communication, organizational culture and employee performance. PT Kereta Api Indonesia as a state-owned company engaged in the transportation sector has unique challenges and opportunities in managing its human resources and operations. Through a qualitative approach, this study collected data from interviews with managers and employees, as well as analysis of internal company documents. The results of this study indicate that effective communication and a strong organizational culture contribute significantly to improving employee performance. In addition, the implementation of clear organizational values ​​and ongoing training are key factors in creating a productive work environment. This study is expected to provide insight for PT Kereta Api Indonesia management in optimizing organizational strategies to achieve better company goals.  

The application of safety is an important matter in carrying out activities inland transportation including railroad transportation. Jabodetabek travel routes are handled directly by PT. Kereta Komuter Indonesia. This activity certainly requires a lot of human labor so safety is very important in this regard. With the existence of safety arrangements, it will avoid any related things from accidents or losses due to the delay in the completion of work caused by the inaccurate company safety management system. Therefore each element involved in each activity requires further knowledge and understanding of the core factors that are in accordance with the safety management system used. Referring to this approach, research is carried out on the railroad industry in Indonesia by developing a safety model in the railway industry. The research was conducted by finding the right literature and then developing a model for the factors considered appropriate to be applied to the safety management system in railroad transportation in Indonesia. After the model was developed, the model was confirmed by the Confirmatory Factor Analysis (CFA) approach with the Structural Equation Modeling (SEM) method. The results of the study will prove that the factors developed in the safety model are positively related to the implementation of commuter train safety management in Indonesia.  

Fixed assets play an important role in supporting the operations of PT Kereta Api Indonesia (Persero) as a BUMN in the transportation sector. This study aims to evaluate the suitability of PT KAI's fixed asset accounting practices in 2023 with PSAK No. 16. This research uses a qualitative approach with descriptive and verification methods, using secondary data in the form of financial statements obtained from the official website of the Indonesia Stock Exchange (IDX). The data is analyzed through document studies and compared with the provisions of accounting standards and supported by relevant scientific references. The results showed that PT KAI has carried out the recognition, measurement, and presentation of fixed assets according to standards, using the straight-line method and the historical cost approach. The statement of financial position is also prepared based on the principle of balance between assets, liabilities, and equity in accordance with PSAK No. 1. This practice shows compliance with accounting standards, and reflects the company's commitment to accountability, transparency, and professional and trusted asset governance.  

This research aims to analyze the factors causing delays to passenger trains on the Makassar-Pare-Pare route and to provide recommendations to improve travel timeliness. This research uses a qualitative approach with interview methods and literature study to obtain more in-depth data regarding the factors that influence delays. Based on research results, train delays are caused by several factors, including inadequate infrastructure, irregular track maintenance, extreme weather, as well as technical and operational problems. The results of interviews with officers and passengers revealed that a lack of coordination between field officers and the control center was also one of the main causes. This research suggests the need for improvements in planning departure schedules, increasing coordination between related parties, improving rail infrastructure, and managing passenger density. It is hoped that with these recommendations, train delays can be minimized, provide better comfort for passengers, and improve the quality of train services on the Makassar-Pare-Pare route

This research aims to analyze the factors causing delays to passenger trains on the Makassar-Pare-Pare route and to provide recommendations to improve travel timeliness. This research uses a qualitative approach with interview methods and literature study to obtain more in-depth data regarding the factors that influence delays. Based on research results, train delays are caused by several factors, including inadequate infrastructure, irregular track maintenance, extreme weather, as well as technical and operational problems. The results of interviews with officers and passengers revealed that a lack of coordination between field officers and the control center was also one of the main causes. This research suggests the need for improvements in planning departure schedules, increasing coordination between related parties, improving rail infrastructure, and managing passenger density. It is hoped that with these recommendations, train delays can be minimized, provide better comfort for passengers, and improve the quality of train services on the Makassar-Pare-Pare route.

Theft of railroad rails in South Lampung is a crime that threatens the safety of transportation and public services. This study aims to analyze the factors that cause this crime and examine the prevention efforts that have been made. The method used is an empirical approach through literature studies and interviews with the police, perpetrators of crime, and academics. The results of the study show that theft is triggered by socio-economic factors such as poverty, unemployment, lack of family supervision, and negative social environmental influences. Lack of legal understanding and easy access to crime information also worsen the situation. Prevention efforts are carried out through three approaches: pre-emptive (legal education and social development), preventive (supervision and protection of infrastructure), and repressive (law enforcement). Collaboration between the community and law enforcement officers is the main key to preventing and overcoming this crime in a sustainable manner.

This research analyzes user sentiment reviews of the KAI Access application from Google Play Store to improve customer service at PT Kereta Api Indonesia. The study uses a Natural Language Processing (NLP) approach with the Latent Dirichlet Allocation (LDA) algorithm to extract main topics from 10,000 reviews collected from April 2024 to April 2025. Analysis results show 40.7% positive sentiment reviews and 49.3% negative. After data preprocessing through case folding, normalization, tokenization, stopword removal, and stemming, seven optimum topics were found from negative sentiment with a coherence score of 0.508343 and two optimum topics from positive sentiment with a coherence score of 0.511673. Analysis based on five service quality dimensions (tangibles, reliability, responsiveness, assurance, and empathy) reveals that the reliability dimension becomes the main issue, including system instability, transaction failures, login difficulties, and data inaccuracy. The responsiveness dimension is the second priority, with users expecting fast and responsive service to complaints. The results of this study provide recommendations for PT KAI to prioritize improvements in system reliability and responsiveness aspects to enhance the overall user experience, which will ultimately impact customer satisfaction and loyalty.    

The railway doorstop system functions to increase the safety of road users and avoid accidents at crossings. This journal discusses the design and implementation of a train doorstop system using Arduino Uno with supporting components such as servo motors, LED lights, resistors and the HC-SR04 ultrasonic sensor. The simulation aims to automate the process of closing and opening gate latches based on the presence of trains, with results demonstrating the effectiveness of the system in improving safety at crossings.  

This study evaluates the policy implementation of the face recognition system at Surabaya Gubeng Station as a digital innovation in public service by PT Kereta Api Indonesia (Persero). Using a qualitative approach and the policy evaluation model by William N. Dunn, the study assesses six key indicators: effectiveness, efficiency, adequacy, responsiveness, accuracy, and equity. The findings indicate that the system is effective in accelerating the boarding process, reducing queues, and improving passenger convenience. Efficiency is achieved through reduced staff workload and automated identity verification. However, several challenges remain, including technical disruptions, data input errors, and low digital literacy among users. Personal data protection is also a concern as most users are not fully aware of how their biometric data is managed. Therefore an adaptive governance strategy is needed, involving infrastructure improvement, staff training, public education, and greater transparency in data policy. With these measures, the face recognition system can serve not only as a tool for technical efficiency but also as a form of inclusive and sustainable public service transformation.

Employee performance is the quality and quantity of work results achieved by an employee in carrying out it in accordance with the responsibilities given. Efforts to improve employee performance include paying attention to the level of workload experienced by employees. Is there a relationship between the mental workload between age and the length of time working for Daily Check employees and is there a relationship between the level of fatigue between age and the length of time working for Daily Check employees? What management efforts can be made to reduce the mental workload and fatigue levels of DC employees? This research aims to determine the mental workload and fatigue levels of daily inspection employees using the DRAWS Method and SOFI Method. The research also wanted to find out whether there was a relationship between mental workload, age and length of service for daily check employees. The results obtained by the research show that the mental workload of daily check employees is included in the overload category. The level of physical fatigue of employees is at a moderate level. There is a strong negative relationship between work mental load and age and length of service. Recommendations for reducing the mental workload of daily check employees are to provide training, time management, stress management skills, recognition, appreciation and regular evaluation.    

Penelitian ini adalah untuk meningkatkan efisiensi layanan transportasi kereta api di Jabodetabek dengan melakukan prediksi jumlah penumpang menggunakan metode Monte Carlo. Dengan menggunakan simulasi ini, data dari tahun 2019-2023 telah dianalisis untuk memprediksi tren pertambahan jumlah penumpang. Prediksi yang telah dibuat akan dimanfaatkan dalam perencanaan kapasitas serta peningkatan kualitas layanan. Maka diharapkan bahwa studi ini akan berkontribusi positif terhadap peningkatan kualitas transportasi kereta api dan efisiensi ekonomi negara. Tujuan khususnya yaitu untuk menyiapkan basis data yang solid untuk merencanakan operasional kereta api, mengenali kecenderungan penggunaan, dan memaksimalkan pemanfaatan sumber daya yang tersedia. Dengan metode ini, pengelola transportasi dapat membuat keputusan yang lebih cerdas dan proaktif untuk mengatasi kenaikan jumlah penumpang di masa depan, sambil meningkatkan tingkat kenyamanan dan kepuasan pengguna layanan kereta api di wilayah Jabodetabek.

Land use changes can impact society, the government, and the environment in either a beneficial or harmful way. The physical and non-physical components of Bandar Klippa Village underwent a variety of modifications as a result of changes in land usage. This is because a train station is being built in North Sumatra's Percut Sei Tuan District's Bandar Klippa Village. The purpose of this study is to examine how the construction of the Banda Klippa train station has affected land use. In this study, a resident of Bandar Klippa Village was interviewed and field observations were made. The study's findings indicate that Bandar Klippa Village's land use is changing, which has an effect on the neighborhood and its inhabitants in particular.