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All Journal EPI International Journal of Engineering Paulus Civil Engineering Journal Jurnal Surya Teknika
Rizki Amaliah
Universitas Tadulako
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Transportation

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Analysis of Ability to Pay and Willingness to Pay in Trans Sulawesi Train Makassar - Parepare Route Amaliah, Rizki; Widyastuti, Hera
EPI International Journal of Engineering Vol 6 No 2 (2023): Volume 6 Number 2, August 2023
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/epi-ije.082023.03

Abstract

The Trans Sulawesi train on the Makassar – Parepare route will traverse four significant stations with a planned length of ± 144 km and start operating in October 2022. Currently, it is not known the amount of travel fare applied to the Makassar - Parepare route. An analysis study of the ability to pay and willingness to pay for the Trans Sulawesi train for the Makassar - Parepare route aims to determine the value of the ability and willingness to pay for prospective service users to determine the Trans Sulawesi train rate. The data was collected by using interview surveys and distributing questionnaires through revealed preference and stated preference approaches. The ability to pay value was analyzed using the household budget method, and the willingness to pay value was analyzed based on the respondent's perception approach. Based on the results of the study obtained, the value of the ability to pay (ATP) of Rp. 144,279 and the value of willingness to pay (WTP) of Rp. 61,426.
KARAKTERISTIK TANAH BERDASARKAN DATA SONDIR PADA PERENCANAAN SALURAN DI KAWASAN HUNTAP POMBEWE KABUPATEN SIGI Warliawati, Sri; Fiisyatin Rodiah; Hardiyanti Sarika; Rizki Amaliah
Surya Teknika Vol. 2 No. 1 (2025): Jurnal Surya Teknika Volume 2 Nomor 1 2025
Publisher : Fakultas Teknik Universitas Muhammadiyah Palu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31934/jst.v2i1.7586

Abstract

Penelitian ini bertujuan untuk menganalisis karakteristik tanah berdasarkan data Cone Penetration Test (CPT) sebagai dasar perencanaan saluran di kawasan Huntap Pombewe, Kabupaten Sigi. Data diperoleh dari tiga titik uji sondir (S08, S09, dan S10) dan dianalisis secara deskriptif kuantitatif. Parameter utama seperti cone resistance (qc) dan sleeve friction (fs) digunakan untuk mengidentifikasi jenis tanah, kedalaman lapisan keras, serta stabilitas tanah permukaan. Hasil menunjukkan bahwa lapisan tanah keras ditemukan pada kedalaman 3,00–4,20 meter, sedangkan tanah permukaan umumnya tergolong lunak hingga sedang. Kondisi ini mengindikasikan perlunya tindakan stabilisasi, penguatan lereng galian, serta desain saluran yang memperhatikan risiko rembesan dan kelongsoran. Implikasi teknis dari karakteristik tanah ini mencakup penggunaan saluran tipe tertutup dan pemasangan struktur pendukung seperti sheet pile atau dinding penahan pada titik-titik dengan tanah lunak dominan. Kajian ini menegaskan pentingnya integrasi data geoteknik dalam mendukung perencanaan infrastruktur yang aman dan berkelanjutan.
Evaluasi Perilaku Tanah Dasar Embung Rano Tadulako terhadap Pengaruh Gempa Rodiah , Fiisyatin; Sarika , Hardiyanti; Amaliah , Rizki; Warliawati , Sri; Andjani, Ni Made Ayu Juli
Paulus Civil Engineering Journal Vol. 7 No. 4 (2025): Paulus Civil Engineering Journal, Vol.7, No.4
Publisher : Universitas Kristen Indonesia Paulus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52722/zj8j2t19

Abstract

Palu City is an earthquake-prone area, notably marked by the September 28, 2018 earthquake (Mw 7.4) which caused significant damage. Rano Tadulako Reservoir serves as a crucial raw water supply for Tadulako University, necessitating evaluation of its subgrade stability against seismic effects. This study evaluates subgrade stability through dynamic bearing capacity analysis using the pseudostatic method. Primary data includes Cone Penetration Tests at 4 points across 20 cross-sections, while secondary data comprises seismic parameters showing PGA = 0.919 g. Analysis involved calculating horizontal seismic coefficient (kh = 0.46), ultimate bearing capacity using Terzaghi's method, and seismic capacity reduction. Results show 84% of the reservoir (16 of 19 segments) meets safety criteria with SF ≥ 1.5, ranging from 0.150 to 7.402. Critical points were identified at segments 9-10 with SF = 0.150. Overall, the subgrade is relatively safe, though local reinforcement and continuous monitoring are essential for long-term stability.
Tinjauan Literatur Sistem Peringatan Fase Hijau: Efisiensi dan Keselamatan pada Simpang Bersinyal Ratnasari Ramlan; Jurair Patunrangi; Ismadarni; Rizki Amaliah; Tri Wahyuningsih
Paulus Civil Engineering Journal Vol. 7 No. 4 (2025): Paulus Civil Engineering Journal, Vol.7, No.4
Publisher : Universitas Kristen Indonesia Paulus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52722/x80hc005

Abstract

Signalized intersections are critical components of urban traffic systems. However, inefficiencies caused by start-up lost time (SULT) and increased accident risks remain major challenges. Green Phase Warning Systems (GPWS) have emerged as an Intelligent Transportation System (ITS) innovation to reduce SULT and improve traffic safety. This paper presents a literature review of GPWS research published from 2010 to 2025. Findings show that GPWS reduces driver reaction time by 15–25%, increases intersection throughput up to 20%, and decreases rear-end collision risks. However, its effectiveness in heterogeneous traffic contexts, particularly in Indonesia where motorcycles dominate, remains limited. Future studies should focus on adaptive GPWS designs tailored for mixed traffic and explore policy frameworks supporting large-scale adoption.
Co-Authors Fiisyatin Rodiah Firhansyah Hardiyanti Sarika Hera Widyastuti Ismadarni Jurair Patunrangi Ni Made Ayu Juli Andjani Ratnasari Ramlan Sarika , Hardiyanti Tri Wahyuningsih Warliawati , Sri Warliawati, Sri