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All Journal Jurnal Konstruksi Enrichment: Journal of Multidisciplinary Research and Development
Putu Alit Suthanaya
Universitas Udayana
Humanities Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Engineering Health Professions Social Sciences

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Analisis Kelayakan Ekonomi Pembangunan Jalan Baru Titik 7 dan 8 Ruas Singaraja–Mengwitani I Gede Wahyu Putra Winarta; Putu Alit Suthanaya; Dewa Made Priyantha
Jurnal Konstruksi Vol 23 No 2 (2025): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.23-2.2559

Abstract

The development gap between North and South Bali has driven the construction of a new road along the Singaraja–Mengwitani section as a provincial strategic project. This study aims to conduct an ex-post economic feasibility evaluation at Points 7 and 8 by analyzing savings in Vehicle Operating Costs (VOC) and value of time, assessing feasibility through both direct and indirect benefits (increase in Regional Own-Source Revenue/PAD), and testing the robustness of results through sensitivity analysis. The research method is quantitative, using secondary data and traffic performance analysis based on PKJI 2023. The quantification of VOC benefits refers to Ministry of Public Works Guidelines No: Pd T-15-2005-B, while investment feasibility is measured using NPV, BCR, and IRR under two scenarios. Scenario 1 considers only direct benefits, while Scenario 2 incorporates potential increases in Buleleng Regency’s PAD as indirect benefits. The results show that the project increases travel speed by 21 km/h and saves 1.14 minutes of travel time. Break-even analysis indicates that feasibility can be achieved merely by stimulating a real PAD growth of 3.62%, a highly realistic target compared to the region’s historical growth rate. It is concluded that the investment justification for this project lies in its role as a catalyst for regional economic development, rather than merely in transportation efficiency. This conclusion is robust, as the project’s strategic feasibility remains valid even under pessimistic scenarios. It is recommended that the government integrate regional economic impact analysis into the evaluation of future strategic projects. This study may serve as a framework for measuring indirect benefits in the form of potential PAD increases, which can become an important consideration in evaluating strategic projects that may conventionally appear economically unfeasible.
Evaluation of Intersection-to-Intersection Signal Coordination Using PTV VISSIM Microsimulation on the Prof. Dr. Ida Bagus Mantra Road Corridor, Klungkung Regency Kadek Windy Tiarnanda Arissa; Putu Alit Suthanaya; Dewa Made Priyantha Wedagama
Enrichment: Journal of Multidisciplinary Research and Development Vol. 4 No. 6 (2026): Enrichment: Journal of Multidisciplinary Research and Development
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/enrichment.v4i6.772

Abstract

Closely spaced signalized intersections can generate recurring queues, delays, multiple stops, and spillback, particularly along corridors experiencing increasing traffic demand. This condition occurs at the Gunaksa and Jumpai Intersections on the Prof. Dr. Ida Bagus Mantra Road corridor in Klungkung Regency. This study aimed to develop, calibrate, and validate a PTV VISSIM microsimulation model, assess existing intersection performance, and evaluate an alternative interintersection signal coordination scheme. A quantitative descriptive-evaluative approach was applied using geometric data, traffic volume, vehicle composition, speed, and signal timing data. Existing intersection performance was assessed using the Indonesian Road Capacity Guidelines (Pedoman Kapasitas Jalan Indonesia [PKJI]) 2023 and PTV VISSIM. The model was calibrated using driving behavior parameters and validated using an independent-samples t-test. Signal coordination alternatives were developed by adjusting cycle length, phase sequence, green time, and offset values based on time–distance diagrams.The existing service levels were classified as Level of Service E at Jumpai Intersection and Level of Service F at Gunaksa Intersection. Signal coordination generally reduced queue length, vehicle delay, stopped delay, and fuel consumption across all observed peak periods, with the most consistent improvements occurring at Gunaksa Intersection. The largest recorded reductions were 24.85% in queue length, 24.53% in vehicle delay, 26.53% in stopped delay, and 20.90% in fuel consumption. Signal coordination improved corridor performance, although its effectiveness varied depending on peak periods and traffic flow characteristics.
Co-Authors Dewa Made Priyantha Dewa Made Priyantha Wedagama I Gede Wahyu Putra Winarta Kadek Windy Tiarnanda Arissa