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All Journal IPTEK Journal of Proceedings Series Jurnal Transportasi Jurnal Sains Dan Teknologi Lingkungan Prosiding Forum Studi Transportasi Antar Perguruan Tinggi Jurnal Sains & Teknologi Lingkungan Jurnal Rekayasa Sipil dan Lingkungan Simposium II UNIID 2017 Jurnal Aplikasi Teknik Sipil INTECOMS: Journal of Information Technology and Computer Science Smart City Makara Journal of Technology Eduvest - Journal of Universal Studies Berkala Forum Studi Transportasi antar Perguruan Tinggi Warta Penelitian Perhubungan
Jachrizal Sumabrata
Fakultas Teknik, Universitas Indonesia, Indonesia
Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Engineering Environmental Science Health Professions Materials Science & Nanotechnology Mechanical Engineering Neuroscience Social Sciences Transportation Other

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Kajian Karakteristik Lalu-Lintas Di Jalan Tol Serta Korelasi Dengan Pola Kecelakaan Ridha, Mujib; Sumabrata, Jachrizal; Siregar, Martha Leni
Warta Penelitian Perhubungan Vol. 26 No. 1 (2014): Warta Penelitian Perhubungan
Publisher : Sekretariat Badan Penelitian dan Pengembangan Perhubungan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25104/warlit.v26i1.867

Abstract

Penelitian ini dilakukan dengan membagi rumusan masalah menjadi 2 bagian yaitu bagaimana karakteristik lalu lintas (arus, kecepatan, dan kepadatan) di jalan Tol Jagorawi arah Bogor dan bagaimana karakteristik lalu lintas di jalan Tol Jagorawi yang menuju Bogor serta korelasi dengan kecelakaan. Penelitian ini bertujuan untuk menyelesaikan rumusan masalah yang ditetapkan yaitu untuk menganalisis karakteristik  lalu lintas (volume, kecepatan dan kepadatan) di jalan Tol Jagorawi arah Bogor dan mengkaji kecelakaan lalu-lintas di jalan Tol Jagorawi arah Bogor serta korelasi dengan karakteristik lalu-lintas. Metode yang digunakan untuk mencapai tujuan penelitian ialah dengan menggunakan metode regresi linear untuk menentukan hubungan antarvariabel lalu lintas melalui model Greenshields untuk pengolahan data primer dan metode tabulasi silang berdasarkan identifikasi kecelakaan untuk pengolahan data sekunder. Adapun untuk data primer didapatkan dengan melakukan perekaman data di area penelitian yang ditentukan dan data sekunder didapatkan dari data Laporan Kepolisian RI (KA Induk PJR Jagorawi). Setelah dilakukan pengolahan data maka didapatkan hasil yang menunjukkan bahwajumlah atau bobot kecelakaan terbesar berada di KM.6+400-KM.14+600 dengan kondisi jumlah arus kendaraan dan kecepatan tempuh yang tergolong rendah (berada kurang dari nilai median) sedangkan kepadatan yang tinggi (berada lebih dari nilai tengah) menghasilkan jumlah kecelakaan terbesar sehingga dapat disimpulkan bahwa pada segmen ini kecelakaan terbesar terdapat pada kondisi area penelitian yang cukup padat dengan jenis kecelakaan depan-belakang.Pada segmen/penggal jalan di lokasi KM.3+867-KM.4+700 memiliki jumlah dan bobot kecelakaan paling rendah bahwa jumlah arus dan kepadatan tidak mempengaruhi jumlah kecelakaan karena kecepatan  maksimum mencapai 34 km/jam ditambah kepadatan paling tinggi di segmen ini menyebabkan pengemudi kehilangan konsentrasi tinggi dengan jenis kecelakaan depan-belakang dan tunggal yang mendominasi.Dari perhitungan uji korelasi didapatkan nilai korelasi (r11) dan nilai determinasi (KD) masing-masing variabel yaitu korelasi angka kecelakaan dan volume sebesar 0,94, angka kecelakaan dan kecepatan sebesar 0,93, angka kecelakaan dan kepadatan 0,93 sehingga dapat disimpulkan bahwa terdapat hubungan linier diantara ketiga variabel tersebut. Kata Kunci :   karakteristik lalu lintas, jumlah dan bobot kecelakaan, jenis kecelakaan, analisis regressi hubungan dengan modelgreenshield, korelasi kecelakaan dengan karakteristik lalu-lintas.
Karakteristik Penyeberangan Pejalan Kaki Pada Lingkungan Sekolah (Studi Kasus Sdn Mekar Jaya 11 Dan Sdn Abadi Jaya 1, Kota Depok) Pradipta, Arya; Sumabrata, R. Jachrizal
Warta Penelitian Perhubungan Vol. 22 No. 2 (2010): Warta Penelitian Perhubungan
Publisher : Sekretariat Badan Penelitian dan Pengembangan Perhubungan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25104/warlit.v22i2.1034

Abstract

Pedestrian in school area has different characteristic rompare to commerce area, industry and officearea. Pedestrian especially students has immeasurable in movemeiit of schoolchild having the characterof and off the cuff is ices unforeseen generates accident, if mixed with vehicle traffic, so that safetyof pedestrian in school area, movement pattern of crossing and level of service of crossing facility ofpedestrian is made by important consideration in planning transportation facilihj especially in schoolarea.Intention of this research analysis is about crosswalk characteristic of pedestrian at school area, so thatas planning and scheme of pedestrian facilities and basic facilities can consider the pedestrian characteristicat school area, on the other hand, this research analyses about movement pattern and crossinglay time of pedestrian which can give information of crosswalk facilihJ h;pe of matching with ZonaSelamat Sekolah ( Z.OSS. .The pedestrian characteristics will be analyzed with microscopic methode. Sighting microscopic isapplied by see behavior of journey happened in each individual. By doing research microscopic henceknowable of characteristic, behavior and movement pattern of pedestrian individually. Researchmicroscopimlly could analyzed journey of pedestrianindividually in position and time, where variable applied is N(pedestrian number), T(time), X and Y(location co-ordinate). Location of observation of this research stays at school area at roadway BahagiaRaya, Depok, precisely stm;s at SDN Mekar Jaya 11 and SDN Abadi Jaya 1.Results of this research expected serve the purpose of one of reference in the relation with planning andscheme of crosswalk facilities in school area. Population applied in this research expected able torepresent is typical behavior of pedestrian in school area.Key Word: pedestrian, microscopic, crosswalk, Zona Selamat Sekolah (Z.OSS)
Effectiveness of Pelican Crossing on Traffic Flow (Case Study: M.H. Thamrin Road and Sudirman Road, Central Jakarta City) Simanjuntak, Windy Aprilia; Soehodho, Sutanto; Sumabrata, Jachrizal
Eduvest - Journal of Universal Studies Vol. 3 No. 12 (2023): Journal Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v3i12.990

Abstract

Pelican Crossing is a crossing with a signaling device that is operated by pedestrians and will stop the flow of vehicle traffic. Pedestrians must press a button to request green time from vehicle drivers so that vehicle drivers stop and pedestrians can cross the road. As a metropolitan city, Central Jakarta is full of activity. The increase in the number of vehicles is not the main factor causing congestion. There are other factors such as the movement of pedestrians crossing the road using Pelican Crossing, causing queues and delays. This study aims to analyze the effect of pedestrians crossing at pelican crossing on the queue length of vehicles, to analyze the characteristics of traffic flow and pedestrians due to pelican crossing and to apply a model that connects the characteristics of traffic flow and pedestrians at pelican crossing. The research was conducted by surveying the existing traffic conditions. The results of the research show that after calculating the PV2 value, we can see the discrepancy in the existing pelican crossing facilities on Jalan MH Thamrin and Jalan Sudirman based on the calculation of pedestrian crossings and traffic volume, which in calculating the PV2 value recommends a non-level crossing type.
Development of an Adaptive Pelican Crossing Model Using Fuzzy Logic in Mixed Traffic Conditions Adam, Manazil; Kusuma, Andyka; Sumabrata, R. Jachrizal
Smart City
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Traffic management at at-grade pedestrian crossing facilities (pelican crossings) in highly populated areas, such as the Universitas Indonesia Station, faces significant inefficiency challenges. During peak hours, the fixed-time system is frequently disabled and replaced with subjective manual control by security personnel, thereby triggering irregular stop-and-go cycles and a high accumulation of vehicle delays. This study aims to develop a hybrid adaptive control model integrating Computer Vision, Genetic Algorithm (GA), and Fuzzy Logic to optimize intersection performance under mixed traffic conditions. The research methodology begins with the extraction of traffic and pedestrian characteristic data, calculated manually through recorded field observations. This manual extraction approach is conducted to ensure the accuracy of the baseline data (ground truth) and to avoid machine detection errors during the initial modeling phase. The precise empirical data is then used to calibrate the mathematical analytical model. Subsequently, a Genetic Algorithm is employed offline to determine the optimal delay equilibrium weights between vehicles and pedestrians. This equilibrium foundation is then integrated with Fuzzy Logic, which acts as a dynamic green time extension mechanism for the Computer Vision-based smart system architecture. Macroscopic evaluation results demonstrate that this hybrid adaptive model successfully performs cycle consolidation, effectively reducing the total number of signal cycles from 19 to 10 compared to the existing manual control. During the morning peak session, the system reduced cumulative vehicular delay by 13.03%, successfully saving a total of 737 seconds. This increase in vehicular efficiency necessitated a minor operational trade-off, resulting in a 5.17% increase in average pedestrian waiting time (from 15.29 to 16.06 seconds per person). Crucially, this adjustment remains strictly within the 18-second ideal safety tolerance threshold, proving that the model successfully achieves an ideal operational equilibrium between competing traffic demands.
Co-Authors A.A. Ketut Agung Cahyawan W Adam, Manazil Adwitiya, R Ivan Adwitiya, R. Ivan Ahmad Syahri Mubarok, Ahmad Syahri Alan Marino Fadhil Muhammad Fajri Frans JSS Sihombing Gabriel Andari Kristanto Ilma Alyani, Ilma Iswara, Khalisa Gina Ivan Fauzan, Ivan Kartika Puspa Dewi Kusuma, Andyka Martha Leni Siregar Maulana Gituri Maulana Ichsan Gituri, Maulana Ichsan Moh. Fikri Makarim, Moh. Fikri Mohammed Ali Berawi Muhammad Safarudin Surya, Muhammad Safarudin Nahry Nahry Owais, Mohammad Parlambang, Satria Adipradana Pradipta, Arya Raflipasya, Muhammad Abyan Raihan Alisha Nabila Rarasati, Ayomi Dita Ridha, Mujib Ruci, Khobat Dewa Sari, Nanda Iryani Intan Sigit P. Hadiwardoyo Simanjuntak, Windy Aprilia Siti Kurnia Astuti Siti Kurnia Astuti, Siti Kurnia Sultan Rianto Sutanto Soehodho Tri Tjahjono Wuri Anny Yumantini