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All Journal U Karst Jurnal Teknik Industri Terintegrasi (JUTIN) APPLIED RESEARCH ON CIVIL ENGINEERING AND ENVIRONMENT (ARCEE) Jurnal Konstruksi
Mahendra, Muhammad Oka
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Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Satisfaction and Determinants of the Decision to Switch from Private Vehicles to Commuter Trains in Merak–Rangkasbitung Mahendra, Muhammad Oka; Djuneydi, Muhammad
UKaRsT Vol. 9 No. 1 (2025): APRIL
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v9i1.6629

Abstract

Urban population growth has had an impact on traffic congestion. Although public infrastructure is available, public preference for private vehicles remains high. This occurs on the Merak-Rangkasbitung route which is served by the train. The gap between service availability and user preferences indicates the need to study mode selection behavior and the factors that influence it. This study aims to analyze motorcycle and car users' tendency to shift their transportation modes from private vehicles to the train service on the Merak- rangkasbitung route. A quantitative approach was carried out using a questionnaire survey method on 300 respondents using a dual-stratum sampling technique. The analysis used the Importance Performance Analysis (IPA), Customer Satisfaction Index (CSI), and Chi-Square test. The IPA results showed a service suitability value of 86.57%, while CSI showed a satisfaction level of 72.86% (satisfied category). The Chi-Square test results identified that the factors influencing the transportation mode choice differed between segments. For motorcycle users, it was influenced by age, car ownership, and reason for travel, while car users were influenced by occupation, travel costs, reasons and purposes of travel. These findings emphasize the importance of a policy approach based on user segmentation and strengthening integration between modes to improve the effectiveness of train services. With an adaptive service strategy and targeted incentive policies, the transformation towards sustainable urban mobility can be realized.
Analisis Kebutuhan Gardu Tol Berdasarkan Teori Antrian dan Proyeksi Volume Lalu Lintas Holiansyah; Mahendra, Muhammad Oka
Jurnal Konstruksi Vol 23 No 2 (2025): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.23-2.2432

Abstract

The Tangerang–Merak Toll Road is a strategic infrastructure that plays a role in reducing congestion and improving the smooth distribution of goods and services. This study aims to analyze vehicle arrival rates, service times, vehicle queues, and the number of toll gates required, both in existing conditions and in projections for the next 10 years. The research method used is quantitative descriptive through field surveys, secondary data collection, and analysis using the FIFO queueing theory and minimum toll road service standards. The results show that the existing toll gate capacity is no longer sufficient to serve the growth in vehicle volume. At the Serang Timur Toll Gate, the number of entry gates needs to be increased from four to six and the number of exit gates from five to seven. Meanwhile, at the Serang Barat Toll Gate, the number of entry gates needs to be increased from five to seven and the number of exit gates from four to six. Queue simulations show that without additional gates, service intensity will exceed optimal capacity (p>1), which has the potential to cause congestion during rush hours and holiday seasons. Based on the analysis, increasing the number of toll booths is an important step to maintain smooth traffic flow and improve service quality in the long term. This system is expected to enhance the transparency and security of digital-based service processes.
Analisis Drainase Simpang Jalan Dengan Menggunakan Software SWMM 5.2 Iqbal, Muhammad; Mahendra, Muhammad Oka
Jurnal Konstruksi Vol 23 No 2 (2025): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.23-2.2472

Abstract

Urban development, such as in Cilegon City, directly affects the drainage system, particularly due to land use changes that increase surface runoff. One of the affected areas is the KH. Wasyid South Ring intersection, which often experiences flooding during heavy rainfall. This problem is generally caused by the insufficient capacity of the drainage channels compared to the runoff generated. This study was conducted to analyze and evaluate the performance of the existing drainage system and to provide recommendations for channel redesign using the Storm Water Management Model (SWMM) software. Daily maximum rainfall data over a ten-year period were analyzed using the Log Pearson Type III distribution to determine the design rainfall. These values were then used to develop the Intensity–Duration–Frequency (IDF) curve, and discharges were calculated using the rational method. The analysis results served as inputs for SWMM modeling to simulate the conditions of the existing channels as well as improvement scenarios. Based on the simulation results, the highest peak discharge occurred at the 25-year return period, amounting to 2.122 m³/s, while the existing channel capacity was insufficient to accommodate this flow. This caused overflow at several channel nodes. After adjusting the channel dimensions in the model, system performance improved significantly. Therefore, SWMM has proven effective in evaluating and redesigning drainage systems in a technical, spatial, and quantitative manner.
Evaluasi Sistem Jaringan Drainase Jalan Raya Menggunakan Sofware HEC-RAS Oktaviani, Andrea; Mahendra, Muhammad Oka
Jurnal Konstruksi Vol 23 No 2 (2025): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.23-2.2473

Abstract

Baros Road, located in Serang Regency – Banten, is an important roadway that frequently experiences flooding during heavy rainfall. This study was conducted to evaluate the capacity of the existing drainage system, which is suspected to be unable to accommodate surface runoff, and to provide technical recommendations for its improvement. The methods employed included primary data collection through channel dimension surveys and secondary data in the form of annual maximum rainfall from the Merak Maritime Meteorological Station for the period 2015–2024. The design rainfall analysis was carried out using the Log Pearson Type III method, yielding a maximum rainfall of 378 mm for a 25-year return period. Rainfall intensity was then calculated for various durations and used in flood discharge calculations with the rational method. The highest discharge was recorded at approximately 2.95 m³/s, while the lowest was around 1.78 m³/s. A hydraulic simulation using HEC-RAS software showed that all STA (100–1000) under existing conditions were unable to contain the flood discharge, with water surface elevations exceeding channel elevations by up to 1.3 m. After improving channel dimensions and increasing bed slope, the re-simulation results indicated that all channels could accommodate the discharge, with a positive margin of up to 0.5 m between channel elevation and water surface. This study concludes that the Baros Road drainage system requires technical upgrades to anticipate peak discharges caused by extreme rainfall, thereby ensuring smoother transportation and minimizing damage to road infrastructure.
Co-Authors Djuneydi, Muhammad Farihah, Iis Aisatul Hevanda, Laska Holiansyah Mahendra, T.S. Hadi Muhammad Iqbal Oktaviani, Andrea Putra, Al Fiillian Sah Putrinur, Shahnarani Ivanov Qishas, Haechal Fachar Refiza, Hazazil Zabila Saputro, Teguh Eko Soekma, Noerfhadilah Indra Sudianto, Toto