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All Journal Indonesian Journal of Electrical Engineering and Computer Science Prosiding Seminar Nasional Official Statistics
Ribut Nurul Tri Wahyuni
Sekolah Tinggi Ilmu Statistik, Badan Pusat Statistik
Humanities Computer Science & IT Economics, Econometrics & Finance Social Sciences

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Urban traffic congestion and its association with gas station density: insights from Google Maps data Hasabi, Rafif; Kurniawan, Robert; Sugiarto, Sugiarto; Tri Wahyuni, Ribut Nurul; Nurmawati, Erna
Indonesian Journal of Electrical Engineering and Computer Science Vol 35, No 3: September 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v35.i3.pp1618-1626

Abstract

Analyzing air pollution caused by traffic conditions requires appropriate indicators. Currently, air pollution indicators are approximated by the number of vehicles and gas station density. However, this approach cannot provide information at a smaller level. This study aims to identify traffic congestion distribution from Google Maps data as an alternative air pollution indicator at smaller level using map digitization method. In addition, this study examines its relationship with the existing indicator called gas station density. The results show that the digitization method can map the traffic congestion distribution where most areas in West, North, and Central Jakarta are classified as high traffic. In addition, this study found that there is a strong and significant relationship of 0.58277 between traffic congestion distribution and gas station density. Thus, traffic congestion distribution and gas station density data from Google Maps can be used as an indicator of traffic-related air pollution, especially land transportation. Furthermore, this research is expected to serve as a basis for the government in determining mitigation strategies related to traffic congestion and the resulting emissions.
Dampak Kebijakan Ekspor Bijih Nikel Indonesia Terhadap Ekspor Nikel Olahan Ananda, Putri; Tri Wahyuni, Ribut Nurul
Seminar Nasional Official Statistics Vol 2024 No 1 (2024): Seminar Nasional Official Statistics 2024
Publisher : Politeknik Statistika STIS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34123/semnasoffstat.v2024i1.2073

Abstract

Indonesia, the world's largest nickel supplier, has implemented three policies regarding nickel ore exports in order to boost the export of refined nickel, which has a higher added value (nickel downstream). The objective of this study is to assess the impact of these policies on Indonesian processed nickel export volumes from January 2012 to December 2023. Interrupted time series analysis is the methodology used. The test results indicate that the policy of prohibiting nickel ore exports in 2014 has the potential to decrease the volume of Indonesian processed nickel exports in the first month of its implementation. The implementation of the relaxation policy for exports of nickel ore grade <1.7% also contributed to the decline in the trend in the volume of Indonesian processed nickel exports from 2017 to 2019. In the interim, the policy of prohibiting the export of nickel ore with a grade of less than 1.7%, which was implemented on January 1, 2020, has the potential to elevate the volume of Indonesian processed nickel exports. Therefore, implementing a prohibition on the export of nickel ore with a grade of less than 1.7% since 2020 can strengthen the nickel downstream program, as it has been shown to increase Indonesia's exports of processed nickel. This phenomenon arises as nickel smelters enhance their capacity to process nickel ore.
Co-Authors Ananda, Putri Damayanti, Maria Goreti Arie Hasabi, Rafif Nurmawati, Erna Robert Kurniawan, Robert Sugiarto S