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Aleksander Purba
Civil Engineering Department, University Of Lampung, Bandar Lampung, 35145
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mathematics Mechanical Engineering Social Sciences Transportation Other

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ANALISIS KELAYAKAN FINANSIAL PADA PROYEK PEMBANGUNAN KERETA API JALUR GANDA ANTARA GEDEBAGE - CICALENGKA fazlina amalia sunes; Aleksander Purba; amril maruf siregar
Jurnal Rekayasa Sipil dan Desain Vol 7, No 2 (2019): Edisi Juni 2019
Publisher : Jurnal Rekayasa Sipil dan Desain

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 Provinsi Jawa Barat dikenal sebagai salah satu pusat perekonomian Indonesia dengan kekayaan utama di sektor pertanian dan perternakan. Salah satu daerah di Provinsi Jawa Barat penghasil terbesar dari sektor-sektor tersebut adalah Kabupaten Bandung yang dilintasi oleh jalur kereta api. Sistem transportasi KA di Kabupaten Bandung sudah menjelma sebagai sarana transportasi umum utama, baik untuk pengangkutan barang maupun penumpang. Dengan keunggulan dan potensi moda transportasi KA, terlebih lagi untuk mendukung upaya pemerintah mengoptimalkan perekonomian Kabupaten Bandung, maka pemerintah berencana membangun jalur KA ganda lintas Gedebage-Cicalengka. Untuk mepermudah transportasi dan menambah kapasitas lintas akan dibangun jalur ganda kereta api pada Gedebage - Cicalengka.Analisis yang dilakukan terkait rencana pembangunan kereta ini adalah analisis finansial dengan meninjau NPV (Net Present Value), BCR (Benefit Cost Ratio), dan IRR (Economic Internal Rate of Return) untuk mengetahui layak atau tidaknya kereta ini direalisasikan. Data yang digunakan merupakan data sekunder berupa tarif kereta Rancaekek – Cicalengka, data pengoperasian kereta Bandung-Cicalengka, tarif dry port pada stasiun Gedebage, volume arus petikemas Gedebage, dan data Inflasi Bank Indonesia tahun 2004 sampai 2018.Skenario yang paling menguntungkan terdapat pada skenario 4, 8, dan 12  dengan nilai BCR 2,13 , 1,86 , dan 1,22. Dan nilai NPV berturut-turut sebesar Rp 229.838.227.622, Rp 174.619.472.560, Rp 44.386.116.874. Dan nilai IRR nya dari skenario tertinggi berturut- turut adalah 11,65%, 11,77%, 12,26%.Kata kunci: Analisis Finansial, Kerta Api, Transportasi
The Characteristics of Traffic Accidents (Case Study of Jendral Sudirman Street Metro City) Tazkia Mustaqima; Rahayu Sulistyorini; Aleksander Purba
Jurnal Rekayasa Sipil dan Desain Vol 8, No 1 (2020): Edisi Maret 2020
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A traffic accident is an accident on the road that is unintentional. One of them is Jendral Sudirman Street, a location where traffic accidents often occur because this road has a high traffic volume in Metro City. This research uses a qualitative method that is descriptive and tends to use analysis. The data collection is done by direct observation and measurement at the research location and obtained through existing data sources.Based on the analysis of data that has been done the number of accidents that occurred on Jendral Sudirman Street, namely 71 incidents from 2014-2018 of 465 incidents of accident in Metro City. Based on the characteristics of accidents most causes of accidents is due to human factors, the type of vehicle that has the most accidents is two-wheeled vehicles, the dominant type of accident is front-back accidents, the time of accidents that often occurs is the time interval 06.00-12.00 .Keywords: Traffic Accident, Characteristics of Accidents, Jendral Sudirman, Metro City
Analysis Of Relationship Between Volume, Speed and Density Based On Greenshield and Greenberg Models A Case Study Of Zainal Abidin Pagar Alam and Imam Bonjol Bandar Lampung. Theresia Monika Naibaho; Aleksander Purba; Muhammad Karami
Jurnal Rekayasa Sipil dan Desain Vol 8, No 4 (2020): Edisi Desember 2020
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An urban area that has a function as a center of activity in an area certainly affects the high levelof community activity and indirectly causes a high number of movement of people, vehicles andgoods in urban areas.The ability to accommodate traffic flows depends on the physical conditionof a road, both in quality and quantity as well as on the operational characteristics of thetraffic.The purpose of this study is to analyze road characteristics and to determine therelationship between volume, speed and density on the Zainal Abidin Pagar Alam road and theImam Bonjol road in Bandar Lampung. This study uses the Greenshield and Greenberg modelsas a method. This method results that the relationship between velocity and density is linear sothat we can see how the pattern of the relationship between velocity, density and volume is. Theresults of this study obtained the free flow speed for Jalan ZA Pagar Alam for 55 km / hour andfor Jalan Imam Bonjol is 38 km / hour. The actual speed on Jalan ZA Pagar Alam is 28km / hourand on Jalan Imam Bonjol is 30km / hour. Meanwhile, the congestion density found on the ZAPagar Alam road is 931 cur / hour and on Jalan Imam Bonjol is 979 cur / hour. The mostoptimum model is in the Greenberg model for Jalan ZA Pagar Alam because the Greenbergmodel has a determination coefficient value (R2) which is closer to the highest accuracy of 0.98%and the Greenshield model on Jalan Imam Bonjol is because it has a determination coefficientvalue ( R2) which is closer to the highest accuracy of 0.96%.
Analysis of the Effectivenesss of Bicycle Lanes in Metro City Muhammad Al Havis; Aleksander Purba; Dwi Herianto; Rahayu Sulistyorini
Jurnal Rekayasa Sipil dan Desain Vol 9, No 4 (2021): Edisi Desember 2021
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AbstractBicycles are an sustainable mode of transportation because they do not produce exhaust gas. Motor vehicle exhaust gas is one of the causes of global warming. The bicycle lane facilities in Metro City aim to get Metro City as an friendly city to cyclists. This study aims to find out the level of effectiveness of bicycle lanes in Metro City. The research methods used for the effectiveness of bicycle lanes are the BCI (Bicycle Compatibility Index) method which refers to the reference (Harkey et al., 1998), the BLOS (Bicycle Level Of Service) method which refers to the reference (Sprinkle Consulting Inc., 2007) and the Guttman method which refers to the reference (Guttman, 1944). The BCI and BLOS model methods result for bicycle lanes in metro city on average get a C rating which means the road conditions are quite suitable (quite safe and comfortable) for cyclists. The obtained of C rank is inseparable from the high volume of traffic and inadequate road body width in some roads. Guttman's method for bike lanes in Metro City resulted in a percentage of 55,55% which means it is suitable for use. Although it is appropriate, but there is still something that needs to be improved on the facilities and there needs to be a policy related to the use of bicycles and bicycle lanes.Keywords: effectiveness, bicycle lane, Metro City, Bicycle Compatibility Index, Bicycle Level of Service, Guttman
Appropriateness Sensitivity Analysis of High Speed Rail Project Fita Efriana; Aleksander Purba; Ika Kustiani
Jurnal Rekayasa Sipil dan Desain Vol 7, No 3 (2019): Edisi September 2019
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High Speed Rail (HSR) is currently regarded as one of the most significant tecnological breakthrought in passenger transportation. Compare to a convensional train, a high speed train will shorten time travel. This study aims to evaluate the viability of high speed rail project based on financial analysis. The parameter used to analyse the financial viability are NPV, BCR, IRR, PP and Break Even Traffic Volume. The analyses also includes sensitivity analysis with a variety of discount rate, annual income and investment cost value. The result of financial viability analysis shows that the project does not meet the financial requirements. It is indicated by negative NPV value, IRR value of 0,27 to 2,28 smaller than the discount rate and PP value much longer than the concession period which are of 50 years. The result of Break Even Traffic Volume shows that the range of total demand number to reach NPV=0 are between 11,27 millions to 11,58 millions. The Number  is very much greater than total passenger number of Argo Parahiyangan train in the year 2018 that is 4,38 millions/ year. Even though based on the financial viability analysis the High speed rail Jakarta-Bandung project is not be feasible. However, based on the economic and social benefits the project is crucial to solve traffic congestion, reduce the pollution rate, and save the time travel.Keywords :High-Speed Train, financial analysis, financial feasibility parameters
Perencanaan Teknis Rehabilitasi Ruas Jalan Tirtayasa ( Studi Kasus Simpang Antasari - Simpang Sutami) Kusnadi Kusnadi; I Wayan Diana; Aleksander Purba
Jurnal Rekayasa Sipil dan Desain Vol 7, No 2 (2019): Edisi Juni 2019
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 Road is an infrastructure of land transportation which is very important for the growth of life because the road is a link between one region to another. In its use, the road always carries heavy loads every time someone crosses it so that it will be vulnerable for damage to occure  at the road surface and pavement structure.One effort to prevent more serious damage to the road is by conducting road rehabilitation such as patching and overlay thickness with the aim of restoring pavement strength so as to provide optimal service to road users. For this reason, a road rehabilitation plan is needed so that it is able to withstand the traffic load that passes through the road and has the as planned age.The purpose of this study was to determine the level of road damage on the Tirtayasa road section. To find out the method of improvement that can be done based on the level of damage and to find out the costs needed to repair the Tirtayasa road.This study begins with data collection and road damage conditions such as groove depth of cracks and holes resulting from visual survey.Analysis of the road conditions based on SDI values, for the Tirtayasa road along 4.8 km, with good conditions (75%), moderate conditions 0.4 km (6.25%), mildly damaged conditions 1.2 km (18, 75%), and 0 km (0%) is severely damaged, so that rehabilitation is done in the form of patching and overlay and the overlay and patching on the Road segment Tirtayasa needs a budget of Rp. 3,254,555,000.00Keywords: planning, technical road rehabilitation
Evaluasi Kapasitas Parkir Unila Berdasarkan Kebutuhan Satuan Ruang Parkir (SRP) Hariadi Tri Pambudi; Tasan Junaedi; Aleksander Purba
Jurnal Rekayasa Sipil dan Desain Vol 6, No 1 (2018): Edisi Maret 2018
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Universitas Lampung adalah universitas negeri pertama di propinsi Lampung dan termasuk universitas favorit di Indonesia; jumlah mahasiswa cenderung naik setiap tahunnya. Kenaikan jumlah mahasiswa berpengaruh kepada kenaikan jumlah pengguna kendaraan bermotor yang berimplikasi naiknya kebutuhan petak parkir. Parkir terpadu merupakan sebuah kebijakan jangka panjang Universitas Lampung untuk menata perparkiran menjadi lebih tertib dan teratur.Penelitian ini dilakukan untuk mengetahui persentase pengguna kendaraan bermotor/transportasi umum, karakteristik parkir dan perbandingan perhitungan kebutuhan petak parkir penelitian dengan siteplan parkir terpadu Universitas Lampung. Data primer digunakan untuk menghitung persentase pengguna kendaraan bermotor dan karakteristik parkir diperoleh dengan membagikan 990 lembar kuisioner. Sedangkan kebutuhan petak parkir diperoleh dari data sekunder, yakni jumlah mahasiswa serta tenaga pendidik dan tenaga kependidikan Universitas Lampung tahun 2013-2016.Dari hasil perhitungan diperoleh persentase pengguna kendaraan sebesar 15% mobil, 65% motor dan 20% angkutan umum/sepeda/jalan kaki. Selanjutnya kebutuhan Satuan Ruang Parkir untuk mobil 279 petak dan motor 1256 petak. Perbandingan kebutuhan petak parkir antara perhitungan dan siteplan parkir terpadu Universitas Lampung sebesar 897 petak mobil dan 1550 petak motormaka tidak perlu dilakukan penambahan petak parkir rencana. Analisis karakteristik parkir diperoleh nilai indeks parkir maksimum mobil 61,08% dan motor 97,79%.
performance of the unsignalized intersection of Jenderal Suprapto-S. Parman road. Fica Pinggungan; Aleksander Purba; Sasana Putra
Jurnal Rekayasa Sipil dan Desain Vol 7, No 2 (2019): Edisi Juni 2019
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With the increase in population and increasing the number of private vehicle ownership, it will cause traffic problems due to the many movements of community mobility, one of which is at the intersection. Bandar Lampung is one of the developing cities that experience these problems. One of the intersections in Bandar Lampung to be reviewed is the unsignalized intersection with 4 arms on Jendral Suprapto-S. Parman road. The purpose of this study is to evaluate and compare the performance of the intersection of Jenderal Suprapto-S. Parman road. Then the results of the analysis using KAJI are capacity (C) 2735 pcu / hour, degree of saturation (DS) 1.12, delay deviation (D) 43.01 sec / pcu and queuing probability (QP%) 60% - 122% with level service C. Analysis with the VISSIM program is a delay of 3.35 seconds / pcu (North), 5.4 seconds / pcu (West), 68.29 seconds / pcu (South), 33.89 seconds / pcu (East), while for long queue 31.68 m (North), 23.98 m (East), 190.3 m (South) and 31.13 m (West) with service level B. While the results of the Queue Theory analysis a delay of 49 seconds / pcu ( North), 39.2 seconds / pcu (West), 72.8 seconds / pcu (South) 124 seconds / pcu (East), while the queue length is 50 m (North), 63 m (East), 40 m (South ) and 25 m (West).
Study of The Access Performance of Airport Toll Road on Trans Sumatera Toll Road Bakauheni – Terbanggi Besar (Case Study: Intersection of Natar Toll Road) Mustika Rahmadini; Aleksander Purba; Dwi Herianto
Jurnal Rekayasa Sipil dan Desain Vol 8, No 4 (2020): Edisi Desember 2020
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The construction of the Trans Sumatra Toll Road provides convenience for the public. The distance from the Natar Toll Gate to the intersection of the Lintas Sumatera Road, which is 2,5 km will interfere with toll performance at the peak of holidays if it is not properly regulated. Therefore, it is necessary to do reaserch to determine the performance of toll roads at the Exit of Natar Toll, to know the performance of roads outside the city on Jalan Branti Raya and to find out the performance of signalized intersections at the Natar Toll Exit Intersection. This reaserch use the 2014 Indonesian Road Capacity Guidelines (PKJI) method. The results show that the performance of the toll road at the Natar Toll Exit was still adequate with degree of saturation with direction 1 is 0,09 and direction 2 is 0,13. The performance of roads outside the city on Jalan Branti Raya  was still adequate with degree of saturation with direction 1 is 0,47 and direction 2 is 0,43. The performance of the signalized intersection at the Natar Toll Exit Intersection is almost saturated with the degree of saturation the south approach is 0.67; the east approach is 0.08 and the north approach is 0.82. The queue for the south approach is 30 meters; the east approach is 2 meters and the north approach is 84 meters. The average delay of the intersection is 25 seconds /skr. To improve the performance of the Natar Toll Exit Intersection, it is necessary to rearrange the green time at this intersection.
Analisis Ekonomi dan Finansial Shortcut Tegineneng - Tarahan Andre Jonathan Siagian; Aleksander Purba; Amril Ma'ruf Siregar
Jurnal Rekayasa Sipil dan Desain Vol 6, No 3 (2018): Edisi September 2018
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Feasibility Analysis is an appropriate analysis of parameters to determine a successful implemented project or not. Feasibility analysis is divided into two parts economic and financial analysis that both affect the feasibility of a project. The purpose of this study is to determine the costs incurred in a railway shortcut project, to analyze delay times before and after a railway shortcut, and to find out which railway shortcut project meets the economic and financial feasibility requirements. In this study, an analysis of the economic and financial feasibility and summarize the economic viability benefits of the Tegineneng - Tarahan shortcut project was conduct. A project is declared feasible or not by doing comparison with the feasibility method that is NPV> 0, BCR> 1, PP faster than the specified time, IRR> capital cost, and PI> 1. This study uses full occupancy rate with discount rate of 5% , 10%, and 15%, respectively.Based on the results obtained in terms of economic feasibility analysis that investment evaluation does not qualify due to the amount of benefit is too small so that economic analysis is not feasible. The aspect of financial feasibility analysis and analysis by summing the two financial and economic benefits is eligible so that the Tegineneng - Tarahan shortcut project is categorized as feasible. Keyword : Economic Feasibility, Financial Feasibility, Feasibility Method
Co-Authors - - Alfiansyah Abdilah, Muhammad Mashardi Abdul Kadir Fajarudin Achmad Nasuhi Adhi, Santoso Waskito Adi Pratomo Adi Pratomo Agung Notonegoro Agung, Damar Agus Karsa Yudha Agus Salim Agus Setiawan Ahmad Samti Anom Alfiansyah, - - Amril Ma'ruf Siregar amril maruf siregar Andera, Frengky Andi Hermawan Andika Wiwaha Andre Jonathan Siagian Andrew Suryadi Andrian Setiawan Andriati, Lika Anggraeni, Imelda Delima Annisa, Mufidah Aulia Anton, Sari ARAINA DWI RUSTIANI Ardinal Saputra Arief, Eldowan Armijon . Armijon Armijon ARMY JOHN Atreyu Alfarido August Riko Suryahana Adipati Azis Juandi Bambang Utoyo banu palaka Batara, M Bima Depati Pratama Canggah Abiyyu Ali'in Saputri Caroline Fadhillah Agnestina Hartono Choiriyyah, Nova Chuing, Andrew Suryadi Desrio Aref Yuga Saputra Desy Mei Dina Dharma , Arie Satria Dian Novita Sari, Dian Novita Diana Nur Afni Didik Santoso DIKPRIDE DESPA Dikpride Despa Dikpride Despa Dikpride Despa Dikpride Despa Dikpride Despa Dikpride, Dikpride Divia Indira Arifin DODDY MEIDIANSYAH Dody Fasola Dwi Herianto Dwi Herianto DWSBU, Chatarina Niken Ecca Urbita Kanedi Saihu Eddy Ristanto ELZA NOVILYANSA Even Ahmad Fauzi Farid, Sulton Farli Aldian Hasanuddin Fauzan Murdapa fazlina amalia sunes Ferdy Zulian Arsy Fernando, Alfred Ferry Desromi Fica Pinggungan Firmansyah Firmansyah Novandaya Fita Efriana Fitra, Rifandy Galih Kusuma Adi Galih Rio Prayogi Gigih Forda Nama Habibi , Budi Muhammad Hadyan Arifin Bustam Hamonangan, Indra Hariadi Tri Pambudi Havis, Muhammad Al Herlambang, Firman HERMAWITA Herri Wardono Herry Wardono I Wayan Diana Ihwan Ika Kustiani Iqbal Attaqi Abel Irawan, Ali Irfian, M Irza Sukmana Irza Sukmana, Irza Isharyanto Iskandar Pani Ismail Ismail Ismail Iwan Julisman Jaya, Eka Putra Jesicha Nainggolan Julisman, Iwan Kadek Edi Artana karami, muhammad Karmolo, Irwan Kasri Patakom Kholbuniah, Megalensi Kumar, Hetzy Mericuri Kurniawan, M. Tito Kusnadi Kusnadi Kustiani , Ika Lidya Theonthein Marcelina Sinaga LIKA ANDRIATI Liza Rosalita LOPULALAN, MARCELLO Lusmeilia Afriani Lusmeilia Afriani Lutfi , Ahmad Rizal M Saba Yunizar Mardalenna IF MARDIANA Mardiana Mardiana Marianza, Yuda Mebro, Helson Megalensi Kholbuniah Meutia Nadia Karunia Michael Mohammad Leksi Budianto Muh Sarkowi Muhammad Al Havis Muhammad Irvan Muhammad Irvan Muhammad Karami muhammad karami Muhammad Ridho Utomo Mulawarman Murdapa, Fauzan Murni Mustaqima, Tazkia Mustika Rahmadini Mutia Septriandini Naibaho, Theresia Monika naufal habibi Niken, Chatarina Notonegoro, Agung NOVA CHOIRIYYAH Novalia, Astri Noviansah, Try Oki Endrata Wijaya Oldebes Temy Giantara Oman Jaya Patakom, Kasri Poppy Nitiranda Faizah Praja, Rozak Pratama, Bima Depati Prigato, Teja Primo, Sulthan Aditia Purba, Daniel Bungaran Putra, M Darmawan Radiansyah, Rizki Rahayu Sulistiyorini Rahayu Sulistyorini Rahayu Sulistyorini Rahayu Sulistyorini Rahayu, Nadya Priartanti Rahmad Syah Putra Rahmadini, Mustika Ratna Widyawati Ratna Widyawati Rinanda Putri Widyasti Rio Trianto Rio, Roma Riri Arinda Adama Risuli Utama Rizal Ardiana Rozak Indra Praja Saihu, Ecca Urbita Kanedi Sasana Putra Sasana Putra Sasana Putra Sasana Putra, Sasana Sentanu, Wayan Yogie Septriandini, Mutia Setiawan, Andrian Shahnaz Nabila Fuady Shahnaz Nabila Fuady Silvia Ruhma Dewi, Niky Siregar, Amril Ma'ruf Siti mutmainnah Siti N Sopilawati, Rahma Sri Waluyo Sri Waluyo Subhan Haris Affandy Sudirmansyah Sudirmansyah Suharno Suharno Suharno Suharno Suharno Sukamto Sultan , Masri Nur Susanto, Darmawan Adi SUSI YANTI Suyatno Suyatno Suyatno Suyatno Syamsul Arifin Tasan Junaedi Tazkia Mustaqima Tedy Murtedjo theresia monika naibaho Toni Hidayat Toni Prasetiawan Trisko Defriyansa Trisya Septiana Tungkup, Doharman Lumban Utami, Chatarina Niken Dwi Wahyuni Setyo Budi Utomo, Muhammad Ridho Utoyo , Bambang Wahyudi, Ahmat Wayan Yogie Sentanu Widyawati , Ratna wisnu andika jaya Yogi Alexander YULIA RAHMAWATI Yuliantini Eka Putri Yunita , Diana