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All Journal Jurnal Media Teknik Sipil Rekayasa Sipil JUTEKS - Jurnal Teknik Sipil ARIKA
Ludfi Djakfar
Universitas Brawijaya
Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Transportation

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STUDY OF IMPROVING PERFORMANCE OF RAPID TRANSIT (BRT) BUS IN YOGYAKARTA Abdul Samad; Achmad Wicaksono; Harnen Sulistyo; Ludfi Djakfar
Media Teknik Sipil Vol. 17 No. 1 (2019): Februari
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jmts.v17i1.7771

Abstract

The implementation of the Rapit Transit Bus (BRT) requires evaluation of performance, by exploring service quality. Because service quality is important for the success of Trans Jogja. The purpose of this study was to determine the existing conditions of bus rapid transit (BRT) service and performance in the city of Yogyakarta, and to find out the priority strategies for implementing bus rapid transit (BRT) management at the study site.  The method used in this study was the Science and QFD methods. The results of the research on the existing level of BRT performance in Yogyakarta, the arrival and departure times of Trans Jogja buses are good and can satisfy passengers, but the waiting time and operating time still need handling. The research results of the priority strategies for implementing BRT management management that need to be addressed are ease of location from the community living environment to the Trans Jogja bus stop, ease of change of mode, and management of cost compliance.
PERENCANAAN JUMLAH TOLL GATE Muhammad Zainul Arifin; Devina Candra Puspita Rini; Khairul Arifin; Ludfi Djakfar
Rekayasa Sipil Vol 15, No 1 (2021)
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2021.015.01.8

Abstract

Pasuruan-Probolinggo toll road was built to increase economic sector in East Java Region. Prior to construction, it’s necessary to analyze potential of toll road users and planning the ideal number of toll gates to comply with minimum service standards. This study uses Stated Preference method to determine vehicle switch, planning of ideal toll gates using Poisson Distribution, and FIFO queuing model used to analyze toll gate service system. Based on analysis, the largest potential road users who will switch to use Pasuruan-Probolinggo toll road section IV in 2021, 2025, 2030, 2035, and 2040 are 5,49%, 23,84%, 30,63%, 30,63%, and 30,63%. The calculation of toll gates is adjusted to the calculation of potential toll road users in 2025, 2030, 2035, and 2040 with the arrival of 385, 503, 657, and 858 vehicles/hour/strip. So, the ideal number of toll gates needed in 2025-2030, are 4 units, and 2035-2040 are 8 units of toll gates.
Evaluasi Penerapan e-Procurement Pada Pengadaan Infrastruktur Pada Instansi Pemerintah Kota Ambon Regina Apituley; Ludfi Djakfar; Indradi Wijatmiko
ARIKA Vol 8 No 2 (2014)
Publisher : Industrial Engineering Study Program, Pattimura University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4225.529 KB)

Abstract

E-procurement adalah proses pengadaan barang/jasa dilakukan secara elektronik (berbasis web/internet) yang diberlakukan untuk mengatasi berbagai kelemahan sistim konvensional yang membuka peluang timbulnya KKN dan Nepotisme. Penelitian ini diselenggarakan untuk mengevaluasi penerapan e-Procurement, dan bagaimana pengaruh penerapan e-procurement terhadap kinerja dan efisiensi pengadaan serta strategi pemerintah kota Ambon ke depan dalam memberlakukan sistim e-Procurement. Metode yang digunakan adalah metode survei pada penyedia jasa (kontraktor) yang terlibat dalam sistem pengadaan infrastruktur. Data dianalisa dengan metode analisis structural equation model (SEM) dan analisis SWOT Hasil dart penelitian meliputi variabel yang berpengaruh terhadap kinerja adalah sistim manajemen kontrol, Kualitas,Kerjasama dengan Mitra Kerja, Hukum dan Peraturan Tentang e-procurement. Variabel yang berpengaruh dan sangat penting terhadap efIsiensi adalah Manajemen Kontrol Data Strategi yang digunakan guna pengembangan organisasi (LKPP) dalam menjalankan sistirn e- procurement adalah meningkatkan sistim manajemen kontrol data, meningkatkan keberhasilan pada kemampuan sumber daya manusia, menerapkan Perpres 54 Tahun 2010 and Perpres 70 Tahun 2012, meminimalkan peluang terjadinya permasalahan dan dampaknya, serta melakukan kerjasama dengan lembaga sandi negara. Hasil penelitian ini juga menunjukkan bahwa sistem e- procurement lebih unggul dibandingkan penggunaan sistem konvensional.
Model Prediksi Kecelakaan Kendaraan Sepeda Motor pada Ruas Jalan di Kota Ambon Frando Simon Hukom; Ludfi Djakfar; Muhammad Zainul Arifin
Rekayasa Sipil Vol. 17 No. 2 (2023): Rekayasa Sipil Vol. 17 No. 2
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2023.017.02.14

Abstract

This study aims to model the prediction of motorcycle vehicle accidents in Ambon City. Factors reviewed in this study include socioeconomic and travel patterns, driving equipment and preparation, driving habits, and driving behavior. The survey was conducted using interview and questionnaire survey methods with a total of 250 respondents. The research method used is data analysis using Structural Equation Modeling (SEM). The results of motorcycle accident modeling show that the first biggest influence on the prediction of an accident is the driver's behavior characteristic variable, with the indicator that describes the cause of a traffic accident is the indicator of driving over the speed limit. Thus when a motorbike driver drives his vehicle fast and exceeds the speed limit, the higher the possibility that the driver will experience a traffic accident. So it is necessary to have cooperation between the police and related parties in dealing with accidents and reducing the risk of traffic accidents such as providing outreach or information, through newspaper or electronic media to the people in Ambon City regarding the dangers of driving over speed or speeding while driving on the road Ambon City.
MODEL PRIORITAS PENANGANAN JALAN (STUDI KASUS DI KABUPATEN TIMOR TENGAH SELATAN, NTT) Fabianus J. S. Nope; Ludfi Djakfar; M. Ruslin Anwar
JUTEKS : Jurnal Teknik Sipil Vol 2 No 2 (2017): JUTEKS (Jurnal Teknik Sipil)
Publisher : P3M- Politeknik Negeri Kupang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (13459.949 KB) | DOI: 10.32511/juteks.v2i2.169

Abstract

Permasalahan yang dihadapi penyelenggara di Kabupaten Timor Tengah Selatan (TTS) adalah ketidakseimbangan alokasi dana dengan tingkat kerusakan jaringan jalan kabupaten. Realisasi Penanganan jalan di Kabupaten TTS sejak tahun 2011 hingga tahun 2014 terjadi peningkatan panjang jalan pada kondisi baik dan kondisi sedang, untuk kondisi rusak ringan dan rusak berat mengalami penurunan. Tujuan penelitian ini yaitu mengetahui kebutuhan biaya penanganan jaringan jalan, mendapatkan model optimasi biaya penanganan jalan, dan juga mendapatkan urutan prioritas penanganan jalan. Penelitian ini menggunakan Metode Simpleks untuk menyusun model optimasi biaya penanganan jalan berdasarkan kondisi jalan dan biaya penanganan jalan, Metode Metode Analitic Hierarchy Process (AHP) untuk mengetahui urutan prioritas penanganan jalan. Hasil penelitian menunjukan bahwa total kebutuhan anggaran penanganan jalan tanpa peningkatan lapis permukaan jalan sebesar Rp. 90.097.135.000, penanganan jalan dengan peningkatan lapis permukaan jalan menjadi Lapis penetrasi macadam sebesar Rp. 195.940.825.000. Model optimasi biaya untuk skenario penanganan jalan tanpa peningkatan lapis permukaan jalan adalah Y = 42713,955 + 499,299 ΔX4 dimana X4 adalah pekerjaan rekonstruksi perkerasan beraspal, sedangkan untuk model optimasi biaya peningkatan lapis permukaan jalan menjadi lapis penetrasi macadam adalah Y = 46266,005 + 623,165 ΔX7 dengan X7 adalah pekerjaan peningkatan perkerasan tanpa pengikat aspal. Urutan prioritas penanganan jalan dengan metode (AHP) ditinjau berdasarkan persepsi stakeholder’s adalah, Ruas jalan dalam kota Soe, ruas jalan oe’oh – Wanibesak, ruas jalan Tumu – Kolbano, ruas jalan Neonmat – Kolbano, ruas jalan Oinlasi – Menu, ruas jalan Oinlasi – Kotolin, ruas jalan Pope – Panite, ruas jalan Sp. Mnelaanen – Fatuatoni, ruas jalan Kaeneno – Nasi, ruas jalan Naususu – Noebesi, ruas jalan Benlutu – Bati, ruas jalan Sp. Kilobesa – Oenino.
Pemodelan Estimasi Kerusakan Jalan Metode Markov Rindah Intansari Mukti; Ludfi Djakfar; M. Zainul Arifin
Rekayasa Sipil Vol. 17 No. 3 (2023): Rekayasa Sipil Vol. 17 No. 3
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2023.017.03.11

Abstract

Roads with damaged conditions can cause traffic accidents and hinder society's economic and social progress. Roads that are left hurt and no repairs will further worsen the condition of these roads. For this reason, it is necessary to analyze the modeling of estimated road damage, which is needed to get an informed picture of future road pavement changes. This study aims to predict road conditions for five years, with the research location being on six roads in Malang Regency. This research method uses interviews and secondary data collection using Markov chain analysis. The method used in this study is the Markov Chain method, which is a method that studies the properties of a variable in the present based on its past properties to determine the properties of these variables in the future. The results of modeling road damage are when road repairs are not carried out, and the injury worsens yearly. On the roads studied, road damage increased from year 0 to year 1, and there were many increases ranging from 2% -7%, and for years 1 to 5, there was an increase of 1%. The conclusion of this study is that road damage is increasing because there is no repair at all, so more funds are needed for road repair costs.
Co-Authors Abdul Samad Devina Candra Puspita Rini Fabianus J. S. Nope Frando Simon Hukom Harnen Sulistyo Indradi Wijatmiko Khairul Arifin M. Ruslin Anwar M. Zainul Arifin Muhammad Zainul Arifin Regina Apituley Rindah Intansari Mukti Wicaksono, Achmad