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Evaluation of Effectiveness and Benefits of iRAP and Bina Marga Methods for Road Safety Assessment on the Karanglo-Bts. Kota Batu (Karang Ploso) Segment Devayanti, Shafira; Machsus, Machsus; Khoiri, Mohamad
Rekayasa Vol. 22 No. 1 (2024)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/rekayasa.v22i1.18056

According to Road Safety (2002), traffic accidents result from vehicles, humans, road environments, and their interactions. Addressing these issues is crucial for improving road safety, particularly for operational roads and those under maintenance, to prevent recurring accidents in the same locations. This study examines the effectiveness and benefits of two road safety assessment methods: the iRAP ranking analysis method and the Bina Marga ranking analysis method. The Karanglo–Batu City Border (Karang Ploso) road segment, spanning 7.99 km, was selected as the study area. Both methods analyze five key accident types: roadway departure, head-on collisions due to loss of control or overtaking, intersection accidents, and accidents at property access points. Factors influencing these accidents include probability, severity, operational speed, external traffic, and median traversability, with star ratings assigned based on the Star Rating Score (SRS). The iRAP method, utilizing the iRAP Demonstrator application, yielded an SRS score of 8.92 (3 stars), while the Bina Marga method, using manual calculations as per the Road Environment and Safety Guidelines Number 06/P/BM/2024, produced a score of 7.13 (3 stars). After implementing rehabilitation recommendations, both methods improved the score to 2.78 (4 stars). Effectiveness values were 35.68 for iRAP and 31.69 for Bina Marga, both categorized as effective. Post-improvement, the effectiveness value was 12.36, categorized as very effective. The iRAP method demonstrated higher direct benefits, particularly in data input, sampling, and implementation, making it more suitable for precise safety assessments.

Pemindahan Supply Point Penjualan Hsfo Menggunakan Metode F-AHP pada PT Pertamina Patra Niaga Jawa Timur Zia Urrahman, Muhammad; Machsus, Machsus
Journal Of Administration and Educational Management (ALIGNMENT) Vol. 8 No. 5 (2025): Journal Of Administration and Educational Management (ALIGNMENT)
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/2xnqrt46

This study aims to determine the best location for relocating PT Pertamina Patra Niaga's High Sulfur Fuel Oil (HSFO) Supply Point in East Java to improve distribution efficiency and reduce logistics costs. The research method used is the Fuzzy Analytical Hierarchy Process (F-AHP) approach, which combines quantitative and qualitative analysis through expert interviews and focus group discussions (FGDs) to assign weights to factors and subfactors influencing location selection. The results indicate that location accessibility has the highest weighting of 0.614, surpassing financial factors at 0.386. The market location subfactor is the top priority, with a weighting of 0.420, as proximity to HSFO consumption centers provides significant distribution efficiency. Based on the F-AHP analysis, TBBM Tuban was selected as the most optimal location with a score of 0.567, surpassing Camplong Madura, Malang, and Madiun. The study concludes that relocating the Supply Point to Tuban is a strategic move that can increase cost efficiency by up to 25%, accelerate distribution, and strengthen the company's competitiveness and operational sustainability. Keywords: HSFO, Location Selection, Fuzzy AHP, Accessibility, Distribution Efficiency

Utilization of teak wood powder waste as eco-friendly filler in HRS-WC asphalt: a comparative analysis of dry and wet Marshall mix methods Machsus, Machsus; Mawardi, Amalia Firdaus; Basuki, Rachmad; Hadi, Achmad Faiz; Islamey, Annizza Putri; Ndruru, Kornelius Sofinner; Wirawan, Arkaan Fadhiilah
SINERGI Vol 30, No 1 (2026)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2026.1.024

With the increasing demand for road durability driven by rapid economic development, innovative and sustainable approaches are essential to improve the strength and service life of road pavements. This study investigates the use of teak wood powder waste (TWPW) as a cost-effective and environmentally friendly filler material in Hot Rolled Sheet – Wearing Course (HRS-WC) asphalt mixtures. Utilizing bio-waste not only supports circular economic principles but also offers economic benefits by reducing reliance on conventional, more expensive fillers. The research evaluates various TWPW concentrations (0%, 0.3%, 0.6%, and 0.9%) and their effects on key Marshall test parameters, including stability, flow, Marshall Quotient (MQ), Voids in Mineral Aggregate (VMA), Voids in Mix (VIM), and Voids Filled with Asphalt (VFA). Samples were prepared using both dry and wet methods in accordance with Bina Marga (2018) specifications. The results indicate that the optimum filler content was 0.9% for the dry method (stability: 1042.68 kg) and 0.6% for the wet method (stability: 1161.14 kg). SEM analysis confirmed that filler dispersion significantly influences the internal structure and porosity of the mixture. At 0.3% and 0.6%, the filler was more evenly distributed, leading to improved compaction and mechanical performance. Conversely, agglomeration at 0.9% increased voids and reduced compaction quality. This study demonstrates that TWPW can serve as a viable low-cost filler alternative, maintaining pavement performance while reducing material costs and environmental impact. The findings support the adoption of sustainable waste utilization practices in road construction.

Choice of Alternatives for Completing Work Tip 182 70 kV GI Namlea–Namrole GI Transmission Project Using Analytical Methods Hierarchy Process (AHP) Firman Syarip; Machsus Machsus
MIX: JURNAL ILMIAH MANAJEMEN Vol 16, No 1 (2026): MIX : Jurnal Ilmiah Manajemen
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jurnal_mix.2026.v16i1.001

Objectives: This study aims to identify the criteria that must be considered in selecting alternative solution for the Tower Intersection Point (TIP) 182 issue on Buru Island, Maluku. The problem emerged after a landslide at the foundation of TIP 182 caused the leg C foundation to sink and the surrounding ground to crack. The research seek to analyze the best alternative solution using the Analytical Hierarchy Process (AHP) method and evaluate the sensitivity of the selected criteria to ensure the robustness of the chosen alternative.Methodology: Data were collected through Focus Group Discussion (FGD) to formulate relevant criteria and alternative solutions, as well as questionnaires to determine the weight of each criterion. The Analytival Hierarchy Process (AHP) was employed to prioritize and rnk the alternatives based on the established criteria. Sensitivity analysis was conducted to assess the stability of the selected alternative under change in criteria weighting.Findings: The FGD identified three alternatives; relocation of the TIP 182, redesign of TIP 183 and cutting slope. Five main criteria were analyzed in depth; technical aspects, resources, cost, duration and risk. The AHP results indicate that the redesign TIP 183 alternatives is the most optimal solution for addressing the problem at TIP 182 on Buru Island. Sensitivity analysis further confirms that variations in the weights of the technical, resources, cost, duration and risk criteria do not significantly alter the ranking position of the redesign TIP 183 alternative as the most superior option.Conclusion: The study concludes that redesign TIP 183 is the most appropriate and robust alternative solution for resolving the TIP 182 issue. The application of AHP provides a structured and objective decision-making framework that supports effective project completion and practical implementation on the field, while also offering a foundation for future related research.

Optimasi Supply Chain Asbuton Nasional PT. Pertamina (Persero) Berbasis Vehicle Routing Problem Dan Genetic Algorithm Adiyagsa, Hardika; Machsus, Machsus
Jurnal Pendidikan Matematika : Judika Education Vol. 9 No. 3 (2026): Jurnal Pendidikan Matematika:Judika Education
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/fqbdyp69

Pemanfaatan Aspal Buton (Asbuton) sebagai salah satu produk strategis nasional masih belum berjalan optimal akibat tingginya biaya pengiriman serta belum terbangunnya integrasi sistem rantai pasok distribusi. PT Pertamina sebagai operator distribusi Asbuton nasional menghadapi tantangan dalam menentukan produsen, distributor, dan perencanaan rute pengiriman di wilayah kepulauan Indonesia yang memiliki karakteristik logistik kompleks Penelitian ini bertujuan mengoptimalkan biaya pengiriman dan merancang supply chain Asbuton nasional PT Pertamina melalui pendekatan Vehicle Routing Problem (VRP) yang diselesaikan menggunakan Genetic Algorithm (GA). Metode penelitian mencakup pengumpulan data sekunder terkait kebutuhan tiap provinsi, kapasitas produksi produsen, kapasitas distributor, serta biaya distribusi berbasis transportasi laut. Model VRP dibangun dengan mempertimbangkan batasan kapasitas dan permintaan, kemudian dioptimasi menggunakan algoritma genetika melalui tahapan inisialisasi populasi, perhitungan nilai fitness, seleksi, crossover, serta proses mutase. Luaran penelitian ini berupa hasil optimasi dengan rute terarah yang menghubungkan produsen, distributor, dan provinsi tujuan, yang mampu menurunkan jarak distribusi sebesar 17% untuk Asbuton B5/20 dan 50% untuk Asbuton B50/30.

Choice of Alternatives for Completing Work Tip 182 70 kV GI Namlea–Namrole GI Transmission Project Using Analytical Methods Hierarchy Process (AHP) Firman Syarip; Machsus Machsus
MIX: JURNAL ILMIAH MANAJEMEN Vol. 16 No. 1 (2026): MIX : Jurnal Ilmiah Manajemen
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jurnal_mix.2026.v16i1.001

Objectives: This study aims to identify the criteria that must be considered in selecting alternative solution for the Tower Intersection Point (TIP) 182 issue on Buru Island, Maluku. The problem emerged after a landslide at the foundation of TIP 182 caused the leg C foundation to sink and the surrounding ground to crack. The research seek to analyze the best alternative solution using the Analytical Hierarchy Process (AHP) method and evaluate the sensitivity of the selected criteria to ensure the robustness of the chosen alternative.Methodology: Data were collected through Focus Group Discussion (FGD) to formulate relevant criteria and alternative solutions, as well as questionnaires to determine the weight of each criterion. The Analytival Hierarchy Process (AHP) was employed to prioritize and rnk the alternatives based on the established criteria. Sensitivity analysis was conducted to assess the stability of the selected alternative under change in criteria weighting.Findings: The FGD identified three alternatives; relocation of the TIP 182, redesign of TIP 183 and cutting slope. Five main criteria were analyzed in depth; technical aspects, resources, cost, duration and risk. The AHP results indicate that the redesign TIP 183 alternatives is the most optimal solution for addressing the problem at TIP 182 on Buru Island. Sensitivity analysis further confirms that variations in the weights of the technical, resources, cost, duration and risk criteria do not significantly alter the ranking position of the redesign TIP 183 alternative as the most superior option.Conclusion: The study concludes that redesign TIP 183 is the most appropriate and robust alternative solution for resolving the TIP 182 issue. The application of AHP provides a structured and objective decision-making framework that supports effective project completion and practical implementation on the field, while also offering a foundation for future related research.

Microwave-Assisted Self-Healing of AC-WC Modified with Iron Powder: Mechanical Performance and Healing Rate Amalia Firdaus Mawardi; Machsus Machsus; Dadang Supriyatno; Achmad Faiz Hadi Prajitno; Muhammad Fikri Nadhif; Hazen Masrafat
Advance Sustainable Science Engineering and Technology Vol. 8 No. 4 (2026): August-October
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v8i4.3297

Conventional asphalt mixtures have limited microwave absorption, reducing the effectiveness of microwave-assisted self-healing. This study evaluates the effect of iron powder (0–10% by mass of fine aggregate) as additional fine aggregate in AC-WC mixtures on mechanical performance and microwave-activated healing behavior. Cylindrical specimens (63 mm × 100 mm; three per mixture) were tested using Marshall Stability and Indirect Tensile Strength (ITS) at 25 °C. Healing efficiency was determined by the ratio of post-heating ITS to initial ITS. Results showed that 10% iron powder increased Marshall stability by 36% compared to the control and achieved the highest healing rate of 76% after the first microwave cycle. However, repeated heating reduced healing performance due to overheating and accelerated binder aging. Iron powder improves early-stage self-healing but requires controlled dosage and heating conditions for long-term durability.

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