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All Journal Jurnal Transportasi Journal of Civil Engineering
Wahju Herijanto
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Civil Engineering, Building, Construction & Architecture Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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VALIDASI PERSAMAAN KORELASI ANTARA NILAI INTERNATIONAL ROUGHNESS INDEX (IRI) DENGAN NILAI KERUSAKAN (NK) JALAN: STUDI KASUS JALAN TOL SURABAYA-GEMPOL Anak Agung Gde Kartika; Wahju Herijanto; Hera Widyastuti; Cahya Buana; Catur Arif P.
Jurnal Transportasi Vol. 6 No. 1 (2006)
Publisher : Forum Studi Transportasi antar Perguruan Tinggi (FSTPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (125.805 KB) | DOI: 10.26593/jtrans.v6i1.1794.%p

Abstract

Abstrak Parameter kondisi perkerasan jalan seperti International Roughness Index (IRI) dan Nilai Kerusakan (NK) jalan sangat jamak digunakan untuk menentukan kinerja pelayanan ruas jalan selain parameter dari sisi lalu lintas. Selain dipakai sebagai kinerja pelayanan jalan, IRI dan NK juga banyak dipakai sebagai input dalam penghitungan Biaya Operasi Kendaraan. Penentuan nilai IRI umumnya cukup sulit dari segi biaya karena harus menggunakan peralatan yang hanya bisa didapatkan di tempat tertentu saja, sementara itu Nilai Kerusakan relatif mudah untuk dilaksanakan.Kartika, dkk (2005) telah berhasil menunjukkan hubungan antara nilai IRI dengan NK yaitu dengan persamaan; IRI=7,765(NK)0,0891. Namun demikian persamaan tersebut dirasa kurang valid mengingat nilai validitasnya (R2) hanya sebesar 0,3215. Hal ini kemungkinan disebabkan dalam menentukan persamaan tersebut belum dilakukan uji korelasi yang cukup terhadap variabel-variabel jenis kerusakan yang terjadi. Artinya semua kategori kerusakan dimasukkan dalam penentuan persamaan tersebut tanpa melihat apakah semua jenis bebar-benar berpengaruh atau tidak.Setelah mempertimbangkan jenis-jenis kerusakan yang paling berpengaruh dengan menggunakan analisis faktor dan analisis korelasi, maka bentuk persamaan yang baru adalah; IRI=7 + 0,066NKRetak + 3,340NKPenurunan + 0,296NKShoving + 0887NKPothole…(R2=0,571)Kata kunci: biaya operasi kendaraan, roughness, IRI, Nilai Kerusakan Jalan
Intermodal Study at Old Gubeng and New Gubeng Railway Stasions Based on Passenger Satisfaction Analysis Yudhistira M. Agathakarien; Wahju Herijanto
Journal of Civil Engineering Vol. 39 No. 2 (2024)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v39i2.7283

Abstract

With the increasing frequency of trains, more and more people are becoming interested in using them for transportation. However, at Gubeng station, the majority of passengers still prefer to use private vehicles or online transportation instead of public transportation. To evaluate passenger satisfaction with intermodal services at both the new and old Gubeng stations, a performance analysis was conducted. Data analysis uses quadrant analysis with the gap analysis method, the Importance Performance Analysis (IPA) method, the Customer Satisfaction Index (CSI) method, and the Fishbein method. From the results of the analysis, a total of 303 respondents were obtained. In the Gap Analysis method, negative values were obtained for all attributes. The overall service satisfaction index using the Customer Satisfaction Index method obtained a satisfaction index of 0.523 with the criteria "quite satisfied". The overall attitude value of the Fishbein method was 417.335, the criteria for a "neutral" attitude value.
The Impact of Toll Roads on The Modes Choice Transportation Case Study: Banyuwangi-Surabaya Moh. Abda G. I. Kholid; Wahju Herijanto
Journal of Civil Engineering Vol. 39 No. 1 (2024)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v39i1.7341

Abstract

Feasibility analysis of Kediri - Tulungagung toll Edna R. Hermansyam; Wahju Herijanto
Journal of Civil Engineering Vol. 38 No. 2 (2023)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v38i2.7473

Abstract

The Kediri-Tulungagung Toll Road is an essential part of the Non-Trans Java Toll Road, which is a national strategic project aimed at facilitating economic activities in the southern part of East Java and improving connectivity to Kediri Airport. This study focuses on analyzing the economic and financial feasibility of the Kediri-Tulungagung toll road development project. The feasibility study involves assessing the project's viability, determining whether it should proceed or be delayed. The analysis includes evaluating traffic volume data, measuring road saturation levels before and after construction, and analyzing the transfer of road users to the toll road. Furthermore, an economic feasibility analysis is conducted to calculate savings in vehicle operating costs and travel time, as well as assess several parameters such as Benefit-Cost Ratio (BCR), Net Present Value (NPV), Internal Rate of Return (IRR), and Payback Period (PbP). Based on JICA 1 modeling and questionnaire responses, calibration values were determined for different vehicle classes. The a value and b value were recalibrated until they reach the appropriate values. The economic feasibility analysis reveals a BCR value of 11,656 (BCR>1), an NPV of IDR 91,043,209,729,042 (NPV>0), and an IRR of 18.3811% (IRR>Interest rate). In the financial feasibility analysis using interest rates as discount rates, the BCR is 6,265 (BCR>1), the NPV is Rp 44,977,644,753,162 (NPV>0), the IRR is 11,872% (IRR>Interest rate), and the Payback Period occurs in the 24th year and 7th month after the toll road's operation. Based on these analyses, the Kediri-Tulungagung Toll Road is deemed economically and financially feasible when using interest rates as the discount rate.
Analysis of the performance evaluation of the logistics express liner port on the T-14 Tanjung Perak – Larantuka – Lewoleba – Kalabahi route in reducing price disparity William A. I. Mawikere; Wahju Herijanto
Journal of Civil Engineering Vol. 38 No. 2 (2023)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v38i2.7475

Abstract

The Express Liner program also known in Indonesia as “Tol Laut”, initiated in 2015, aimed to reduce price disparities between Java and eastern Indonesian regions by providing regular and sustainable shipping services to remote areas. However, after seven years, the program has not significantly affected price disparities in eastern Indonesia. To evaluate the program's effectiveness, this study examined port performance and economic changes resulting from Express Liner. The study identified areas of improvement for Larantuka, Lewoleba, and Kalabahi ports, such as docks, terminals, access roads, and storage facilities. Port performance evaluation revealed that Larantuka Port had subpar utilization of docks and stacking fields, while Lewoleba Port exhibited poor dock usage. Kalabahi Port, on the other hand, demonstrated good performance in dock utilization and stacking field usage. Regarding ship services, Larantuka Port showed good waiting time performance but poor loading and unloading productivity and ship effectiveness. Lewoleba Port had unfavorable waiting time in 2021 but improved in 2022, while its loading and unloading productivity and effectiveness were poor in both years. Kalabahi Port demonstrated good waiting time and effectiveness, but its loading and unloading productivity fell short of the standard. Evaluating the economic impact, the Express Liner program did not significantly reduce the prices of necessities. Certain commodities experienced price increases influenced by regional distances and price fluctuations in Surabaya. However, medium rice prices decreased significantly in Larantuka and Kalabahi, indicating a positive impact of the Express Liner program in those areas.
SURFACE WATER MODELLING AT LAMONG BAY Cahya Buana; Her Widyastuti; Wahju Herijanto; Catur Arif Prastyanto; Anak Agung Gde Kartika; Budi Rahardjo; Istiar Istiar
Journal of Civil Engineering Vol. 29 No. 2 (2009)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v29i2.7609

Abstract

Development of ports in the Lamong Bay may result in changes in flow pattern and velocity. In order for such development does not cause a big impact analysis should be made based on the understanding of the physical processes that will occur. This study examined the flow pattern and velocity of Lamong Bay. Existing model simulation results indicate that the direction of motion of the water flow to the front line of Gresik Ports were more integrated with the dominant direction were Northwest - Southeast, whereas in front of the Port of Tanjung Perak flow direction were dominated by West - East. The findings also suggest the direction of movement of currents in the Lamong Bay were more spread and dominated by the movement parallel to the contour of the coastline.
Co-Authors Anak Agung Gde Kartika Budi Rahardjo Cahya Buana Catur Arif P. Catur Arif Prastyanto Edna R. Hermansyam Her Widyastuti Hera Widyastuti Istiar Istiar Moh. Abda G. I. Kholid Nurwijayanti William A. I. Mawikere Yudhistira M. Agathakarien