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All Journal Jurnal Keselamatan Transportasi Jalan (Indonesian Journal of Road Safety) Jurnal Keselamatan Transportasi Jalan
Eska Fahmadi, Aat
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Engineering Mechanical Engineering Transportation

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Kajian Penerapan Pemeriksaan Persyaratan Teknis Pada Unit Pelaksana Uji Berkala Kendaraan Bermotor Sesuai Buku Pedoman Pengujian Kendaraan Bermotor Jilid II B Dan II D Novianto, Arief; Eska Fahmadi, Aat; El Tosi, Vinno
Jurnal Keselamatan Transportasi Jalan (Indonesian Journal of Road Safety) Vol. 9 No. 1 (2022): JURNAL KESELAMATAN TRANSPORTASI JALAN (INDONESIAN JOURNAL OF ROAD SAFETY)
Publisher : Pusat Penelitian dan Pengabdian Masyarakat (P3M)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46447/ktj.v9i1.415

Abstract

Motor vehicle testing is a series of activities to test and/or inspect parts of motorized vehicles, trailers, patch trains and special vehicles in the context of meeting technical requirements and roadworthiness both visually and manually. The problem faced is that there is no uniformity of technical services carried out in each of the Implementing Units of the Periodic Motorized Vehicle Test (UPUBKB). The purpose of this study was to determine the suitability of items and the flow of the technical inspection process in UPUBKB with those in the motor vehicle testing manual volumes II B and II D. The sampling method used in this study was simple random sampling, amounting to 32 UPUBKB. from a total population of 212 UPUBKB in Indonesia that have obtained accreditation A and B. The data collection method used is literature study and observation using a questionnaire (Likert scale) and a check list. The submission of questionnaires and checklists was carried out offline and online to 32 UPUBKB locations spread throughout Indonesia. The data will be analyzed descriptively quantitatively. The results of the study showed that only 53% or 17 UPUBKB had the flow of the vehicle technical inspection implementation process in accordance with the motor vehicle testing manual, 47% of the UPUBKB samples did not comply with the technical inspection flow. Of the 17 UPUBKB, there are 7 UPUBKB accredited A and 10 UPUBKB accredited B. Meanwhile, of the 32 samples of UPUBKB, not all of them have carried out technical inspections in accordance with the items in the motor vehicle testing manual, and based on the questionnaire, the examiner respondents at UPUBKB strongly agree (92 .5%) and expects a national standard for technical inspection of motor vehicles.
Studi Karakteristik Aliran Udara Kendaraan dengan Penambahan Spoiler Belakang Standard Dan Lebih Panjang Kurniawan, Moch. Aziz; Oktopianto, Yogi; Eska Fahmadi, Aat; Rusmandani, Pipit
Jurnal Keselamatan Transportasi Jalan (Indonesian Journal of Road Safety) Vol. 9 No. 1 (2022): JURNAL KESELAMATAN TRANSPORTASI JALAN (INDONESIAN JOURNAL OF ROAD SAFETY)
Publisher : Pusat Penelitian dan Pengabdian Masyarakat (P3M)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46447/ktj.v9i1.416

Abstract

The use of rear spoilers on MPV vehicles is often used by the public to get an aerodynamic vehicle body design. The understanding of the function of using rear spoiler accessories in the community is still low, so it is necessary to study the characteristics of air flow in aerodynamics. This study aims to determine the flow characteristics of MPV type vehicles with standard and longer rear spoiler installation. This research was conducted in a Subsonic Open Circuit wind tunnel with test section dimensions (365 x 365 x 1250) mm. The flow characteristics were observed experimentally that passed through the model surface resembling the first generation Toyota Avanza MPV with a ratio of 1:20 with variations of the standard and longer rear spoiler installation. Measurement of the flow velocity profile behind the vehicle test model was carried out at an X/L ratio of 0.32 from the leading edge with a speed adjusted to the Reynolds number value of 1.96 x 105. The flow characteristic observed was the pressure distribution (Cp) on the center line of the top surface. and under the test vehicle model, the flow momentum deficit behind the test vehicle model, the lift pressure coefficient (CLP), and the drag pressure coefficient (CDP). The results of data collection show that the installation of a standard and longer rear spoiler relatively increases the Cp value, the flow momentum deficit behind the vehicle model, the lift pressure coefficient (CLP) value and decreases the drag pressure coefficient (CDP) value. The biggest increase was in the installation of a longer rear spoiler with an increase in the Cp value of 4.7%, an increase in the flow momentum deficit by 1.27%, an increase in the CLP value by 0.11% and a decrease in the CDP value by 0.06% compared to the vehicle model without using a rear spoiler.
Analisis Lokasi Rawan Kecelakaan Pada Jalan Dengan Medan Datar Dan Bukit Hadi, Suprapto; Wahyudi, S. Imam; Wibowo, Kartono; Oktopianto, Yogi; Eska Fahmadi, Aat; Widya Anggraeni, Inneke
Jurnal Keselamatan Transportasi Jalan (Indonesian Journal of Road Safety) Vol. 12 No. 1 (2025): JURNAL KESELAMATAN TRANSPORTASI JALAN (INDONESIAN JOURNAL OF ROAD SAFETY)
Publisher : Pusat Penelitian dan Pengabdian Masyarakat (P3M)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46447/ktj.v12i1.686

Abstract

Accidents occur on various road terrains that cause drivers to experience losses from property to fatalities. Prof. Hamka Street and Siliwangi Street are located in the city of Semarang where Prof. Hamka Street is a road with a hilly topography while Siliwangi Street is a flat road. Problems occur on these road sections such as the many accidents that result in fatalities. The existing problems need to be addressed immediately so that they can reduce the risk of accidents in the future. The stages carried out first analyze the characteristics of accidents and vulnerable locations so that they know the most appropriate handling points and recommendations. In determining the location points prone to accidents using the EAN and UCL methods while in identifying the hazards of vulnerable locations using HIRARC. The results obtained on Prof. Hamka Street, the location points are at STA 6 (0 + 700) and 9 (1 + 000) while on Siliwangi Street, the location prone to accidents is at STA 18 (1 + 900) and 5 (0 + 600). The recommended handling is to repair the condition of the road surface that has cracks at the joints, signs at accident-prone locations that are still very lacking, street lighting at accident-prone locations, maintenance on the road so that obstacles on the side of the road do not block visibility and installation of vehicle speed control devices.
Analisis Lokasi Rawan Kecelakaan Pada Jalan Dengan Medan Datar Dan Bukit Hadi, Suprapto; Wahyudi, S. Imam; Wibowo, Kartono; Oktopianto, Yogi; Eska Fahmadi, Aat; Widya Anggraeni, Inneke
Jurnal Keselamatan Transportasi Jalan (Indonesian Journal of Road Safety) Vol. 12 No. 1 (2025): JURNAL KESELAMATAN TRANSPORTASI JALAN (INDONESIAN JOURNAL OF ROAD SAFETY)
Publisher : Pusat Penelitian dan Pengabdian Masyarakat (P3M)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46447/ktj.v12i1.686

Abstract

Accidents occur on various road terrains that cause drivers to experience losses from property to fatalities. Prof. Hamka Street and Siliwangi Street are located in the city of Semarang where Prof. Hamka Street is a road with a hilly topography while Siliwangi Street is a flat road. Problems occur on these road sections such as the many accidents that result in fatalities. The existing problems need to be addressed immediately so that they can reduce the risk of accidents in the future. The stages carried out first analyze the characteristics of accidents and vulnerable locations so that they know the most appropriate handling points and recommendations. In determining the location points prone to accidents using the EAN and UCL methods while in identifying the hazards of vulnerable locations using HIRARC. The results obtained on Prof. Hamka Street, the location points are at STA 6 (0 + 700) and 9 (1 + 000) while on Siliwangi Street, the location prone to accidents is at STA 18 (1 + 900) and 5 (0 + 600). The recommended handling is to repair the condition of the road surface that has cracks at the joints, signs at accident-prone locations that are still very lacking, street lighting at accident-prone locations, maintenance on the road so that obstacles on the side of the road do not block visibility and installation of vehicle speed control devices.
Kajian Penerapan Pemeriksaan Persyaratan Teknis Pada Unit Pelaksana Uji Berkala Kendaraan Bermotor Sesuai Buku Pedoman Pengujian Kendaraan Bermotor Jilid II B Dan II D Novianto, Arief; Eska Fahmadi, Aat; El Tosi, Vinno
Jurnal Keselamatan Transportasi Jalan (Indonesian Journal of Road Safety) Vol. 9 No. 1 (2022): JURNAL KESELAMATAN TRANSPORTASI JALAN (INDONESIAN JOURNAL OF ROAD SAFETY)
Publisher : Pusat Penelitian dan Pengabdian Masyarakat (P3M)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46447/ktj.v9i1.415

Abstract

Motor vehicle testing is a series of activities to test and/or inspect parts of motorized vehicles, trailers, patch trains and special vehicles in the context of meeting technical requirements and roadworthiness both visually and manually. The problem faced is that there is no uniformity of technical services carried out in each of the Implementing Units of the Periodic Motorized Vehicle Test (UPUBKB). The purpose of this study was to determine the suitability of items and the flow of the technical inspection process in UPUBKB with those in the motor vehicle testing manual volumes II B and II D. The sampling method used in this study was simple random sampling, amounting to 32 UPUBKB. from a total population of 212 UPUBKB in Indonesia that have obtained accreditation A and B. The data collection method used is literature study and observation using a questionnaire (Likert scale) and a check list. The submission of questionnaires and checklists was carried out offline and online to 32 UPUBKB locations spread throughout Indonesia. The data will be analyzed descriptively quantitatively. The results of the study showed that only 53% or 17 UPUBKB had the flow of the vehicle technical inspection implementation process in accordance with the motor vehicle testing manual, 47% of the UPUBKB samples did not comply with the technical inspection flow. Of the 17 UPUBKB, there are 7 UPUBKB accredited A and 10 UPUBKB accredited B. Meanwhile, of the 32 samples of UPUBKB, not all of them have carried out technical inspections in accordance with the items in the motor vehicle testing manual, and based on the questionnaire, the examiner respondents at UPUBKB strongly agree (92 .5%) and expects a national standard for technical inspection of motor vehicles.
Studi Karakteristik Aliran Udara Kendaraan dengan Penambahan Spoiler Belakang Standard Dan Lebih Panjang Kurniawan, Moch. Aziz; Oktopianto, Yogi; Eska Fahmadi, Aat; Rusmandani, Pipit
Jurnal Keselamatan Transportasi Jalan (Indonesian Journal of Road Safety) Vol. 9 No. 1 (2022): JURNAL KESELAMATAN TRANSPORTASI JALAN (INDONESIAN JOURNAL OF ROAD SAFETY)
Publisher : Pusat Penelitian dan Pengabdian Masyarakat (P3M)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46447/ktj.v9i1.416

Abstract

The use of rear spoilers on MPV vehicles is often used by the public to get an aerodynamic vehicle body design. The understanding of the function of using rear spoiler accessories in the community is still low, so it is necessary to study the characteristics of air flow in aerodynamics. This study aims to determine the flow characteristics of MPV type vehicles with standard and longer rear spoiler installation. This research was conducted in a Subsonic Open Circuit wind tunnel with test section dimensions (365 x 365 x 1250) mm. The flow characteristics were observed experimentally that passed through the model surface resembling the first generation Toyota Avanza MPV with a ratio of 1:20 with variations of the standard and longer rear spoiler installation. Measurement of the flow velocity profile behind the vehicle test model was carried out at an X/L ratio of 0.32 from the leading edge with a speed adjusted to the Reynolds number value of 1.96 x 105. The flow characteristic observed was the pressure distribution (Cp) on the center line of the top surface. and under the test vehicle model, the flow momentum deficit behind the test vehicle model, the lift pressure coefficient (CLP), and the drag pressure coefficient (CDP). The results of data collection show that the installation of a standard and longer rear spoiler relatively increases the Cp value, the flow momentum deficit behind the vehicle model, the lift pressure coefficient (CLP) value and decreases the drag pressure coefficient (CDP) value. The biggest increase was in the installation of a longer rear spoiler with an increase in the Cp value of 4.7%, an increase in the flow momentum deficit by 1.27%, an increase in the CLP value by 0.11% and a decrease in the CDP value by 0.06% compared to the vehicle model without using a rear spoiler.
Co-Authors El Tosi, Vinno Hadi, Suprapto Kartono Wibowo, Kartono Kurniawan, Moch. Aziz Novianto, Arief Pipit Rusmandani, Pipit S Imam Wahyudi Widya Anggraeni, Inneke Yogi Oktopianto