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All Journal Jurnal Rekayasa Sipil dan Lingkungan Journal of Environmental Science and Sustainable Development Journal of Indonesia Road Safety Indonesian Journal of Multidisciplinary Science International Journal on Advanced Technology, Engineering, and Information System (IJATEIS) Smart City Makara Journal of Technology Warta Penelitian Perhubungan
Martha Leni Siregar
Department Of Civil Engineering, Faculty Of Engineering, Universitas Indonesia, Depok, Indonesia
Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Public Health Social Sciences Transportation

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ANALYSIS OF DRIVING SPEED IN HIGHWAY AND PSYCHOLOGICAL FACTORS IN SPEEDING BEHAVIOR IN THE JAKARTA AREA AND ITS SURROUNDINGS (CASE STUDY: BEKASI MAIN STREET) Guritnaningsih Guritnaningsih; Martha Leni Siregar; Ahmad Septiawan
Journal of Indonesia Road Safety Vol 2 No 3 (2019): Journal of Indonesia Road Safety
Publisher : Traffic Accident Research Center, Indonesia Traffic Police Corps and University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/korlantas-jirs.v2i3.15032

Abstract

Driving a vehicle above the speed limit is unsafe driving behavior that may cause the occurrence of an accident. Speed limitation can be one way to improve road safety. This study aims to get an illustration of speed limit violation committed by the drivers on the national road segment, and also to investigate the demographic and psychological factors that affect driver behavior in violating the speed limit as stated in the traffic regulation. Speed data collection was carried out at the Bekasi Raya national road in Bekasi, while the demographic and psychological data were collected using questionnaires through online methods. The result of speed measurement using Speed Gun to 30 motorcycles, 30 light vehicles, and 30 heavy vehicles, shows that there are no light or heavy vehicles that drive above the speed limit. Speeding behavior only is indicated by a little number of motorcyclists. From the online survey through the distribution of questionnaires to 102 motorcyclists, it was found that speeding behavior tends to be done when they are in a rush situation. Mengendarai kendaraan di atas batas kecepatan (ngebut) merupakan perilaku mengendara yang berkontribusi terhadap terjadinya kecelakaan..Salah satu cara untuk meningkatkan keselamatan di jalan raya adalah dengan pembatasan kecepatan. Penelitian ini bertujuan untuk mendapatkan gambaran tentang pelanggaran batas kecepatan yang dilakukan pengemudi di ruas jalan nasional, dan faktor-faktor demografis, serta faktor psikologis yang berperan dalam perilaku pengendara kendaraan bermotor melanggar batas kecepatan yang telah ditentukan oleh peraturan lalu lintas. Pengambilan data kecepatan dilakukan di jalan nasional Bekasi raya, sedangkan data tentang faktor demografis dan psikologis diperoleh melalui penyebaran kuesioner melalui online. Hasil pengukuran kecepatan terhadap 30 sepeda motor, 30 kendaraan ringan, dan 30 kendaraan berat dengan Speed Gun menunjukkan bahwa tidak ada kendaraan ringan maupun kendaraan berat yang mengemudikan kendaraan di atas batas kecepatan. Perilaku ngebut dilakukan oleh sebagian kecil pengendara sepeda motor. Dari survey melalui penyebaran kuesioner terhadap 102 pengendara diperoleh gambaran bahwa perilaku ngebut cenderung dilakukan ketika berada pada situasi tergesa-gesa.
Hazard-Driven Drivers’ Behaviours towards Vehicle-to-Median Safe Distances Siregar, Martha Leni
Makara Journal of Technology Vol. 19, No. 1
Publisher : UI Scholars Hub

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Abstract

A median is required for a two-way road to separate traffic from opposing lanes and to prevent head-on collisions. However, studies indicate that medians are also perceived as hazards which need to be avoided during driving. This hazard perception is manifested in drivers’ changing behavior towards various types of medians along the driving lanes inform of their tendency to allow various safe distances to the medians. The Indonesian Highway Capacity Manual (IHCM) does not differentiate between types of medians and the influence on the drivers’ choice of safe margin to the medians. Therefore, this study looks into how the existence and types of medians influence the safety distances of different categories of vehicles from different types of medians as the manifestation of their perception of hazard potentials of medians. Traffic recordings on different categories of vehicles are used to obtain movement margins of vehicles along various medians during near-saturated traffic. Using the smallest values of 10 and 90 percentile of distances, the results show that drivers shy from 0.27 m to 0.82 m from medians. The result of this study will contribute to the change of applied assumptions used in determining the effective lane capacity to road safety-based assumptions.
Identifikasi dan Analisis Efektivitas Penanganan Blackspot di Jalan Perkotaan (Studi Kasus: Kota Depok) Hizkia Adhikaratma; Karina .; Muhammad Rifqi Kinansyahputra; Ahmad Septiawan; Martha Leni Siregar
Jurnal Rekayasa Sipil dan Lingkungan Vol 6 No 2 (2022): Jurnal Rekayasa Sipil dan Lingkungan
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jrsl.v6i2.36611

Abstract

This research was conducted to identify blackspots, determine the diagnosis and causes of accidents at the blackspot in Depok City, and develop a program for handling them. The method to identify the blackspot is the network screening method with the simple ranking method, ACF, and EPDO. In this study, a blackspot was found on Jalan Raya Bogor (in front of Pertamina gas stations), Sukamaju, Kec. Cilodong, Depok City. Traffic accidents that occur tend to be front-back and front-front collisions involving pedestrians and often occur at night with dim lighting conditions. There are several ways to handle blackspots or mitigating accidents, such as the installation of rumble strips, zebra cross, street lighting, signs, and tree logging. After handling the blackspot, the number of accidents is predicted to decrease from 7 to 3 accidents. The BCR value is 93,663 > 1, so that the treatment program is feasible to be implemented. ABSTRAK Penelitian ini dilakukan untuk mengidentifikasi blackspot, mengetahui diagnosis dan penyebab kecelakaan pada titik blackspot Kota Depok, serta menyusun program penanganan dan perbaikannya. Metode untuk menentukan titik-titik blackspot adalah network screening method dengan metode simple ranking, ACF, dan EPDO. Pada penelitian ini didapatkan titik blackspot di Jalan Raya Bogor Km. 37 (depan SPBU Pertamina 34.164.05), Sukamaju, Kec. Cilodong, Kota Depok. Kecelakaan lalu lintas yang terjadi cenderung bertipe tabrakan depan-belakang dan depan-depan yang melibatkan pejalan kaki dan dominan terjadi pada malam hari dengan kondisi pencahayaan redup. Penanganan yang dilakukan pada blackspot yaitu pemasangan pita penggaduh, zebra cross, lampu penerangan jalan, rambu-rambu, dan penebangan pohon. Setelah adanya penanganan blackspot, angka kecelakaan diprediksi berkurang dari 7 menjadi 3 kecelakaan. Didapatkan nilai BCR sebesar 93,663 > 1 sehingga program penanganan layak untuk dilaksanakan.
Impact of Auxiliary Markings on Intersection Safety Franata, Mhd Tommy; Siregar, Martha Leni; Kusuma, Andyka
Smart City Vol. 4, No. 2
Publisher : UI Scholars Hub

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Abstract

The rapid growth of motorcycle vehicles coupled with inadequate traffic discipline contributes to an escalating rate of traffic accidents and casualties. This study investigates the efficacy of auxiliary road markings in enhancing traffic safety and intersection performance along Lieutenant Sutopo Street, Promoter Street, and Boulevard BSD East in South Tangerang, Indonesia. Employing the Traffic Conflict Technique (TCT), the research evaluates safety enhancements and service level alterations subsequent to the installation of road markings. Preliminary observations highlight significant safety concerns and traffic conflicts at the intersection. Consequently, auxiliary road markings are strategically installed to regulate driver behavior, enhance lane discipline, and improve visibility. Post-installation observations revealed a significant decrease in total vehicle conflicts, though the percentage of severe conflicts slightly increased. Initially rated as Level of Service (LOS) F with high delays, the LOS remained the same post-marking installation but with reduced delays. Further cycle time adjustments improved the LOS to E, indicating a substantial overall reduction in delays. The findings suggest that although auxiliary road markings effectively reduce traffic conflicts and improve intersection performance, additional measures are necessary to address the severity of these conflicts. The study offers valuable insights into the effectiveness of road safety interventions, supporting broader strategies for improving traffic management and safety in urban areas.
ANALYSIS OF THE RELATIONSHIP BETWEEN SPEED CONSISTENCY AND TRAFFIC ACCIDENT PROBABILITY (ON THE MOJOKERTO-SURABAYA TOLL ROAD) RISFIANDI, RIKI; Siregar, Martha Leni
Smart City Vol. 4, No. 2
Publisher : UI Scholars Hub

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Abstract

Vehicle speed consistency plays a crucial role in maintaining traffic safety, with speed limits set to reduce accident fatalities. While the direct impact of speed limits on vehicle speed is minimal, their implementation significantly influences driver behavior, with about 85% of drivers complying with speed limits. However, variables such as traffic volume, weather conditions, and travel urgency often cause drivers to be inconsistent in adhering to these limits, increasing accident risk. On the Mojokerto-Surabaya toll road, data from Traffic Corps and Jasa Marga recorded 193 accidents with 101 fatalities from 2018 to August 2023, mostly caused by driver behavior such as excessive speed. This study analyzes the relationship between speed consistency and accident probability on this road, highlighting accident issues due to speed violations and inconsistency at ramp off/on locations. Results show the importance of toll road infrastructure considering vehicle volume, identifying accident blackspots, and implementing urgent speed management as key factors in improving safety on the Surabaya-Mojokerto toll road. The findings emphasize the need for better traffic management and speed regulation to reduce fatal accident risks.
ROAD SAFETY ASSESSMENT FOR ACCIDENT AND NON-ACCIDENT CASES SUPPORTING SUSTAINABLE DEVELOPMENT GOALS 2030 Nugraha, Brian Nararya; Nurcahyati, Sekar Warangi; Adhikaratma, Hizkia; Siregar, Martha Leni
Journal of Environmental Science and Sustainable Development Vol. 7, No. 2
Publisher : UI Scholars Hub

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Abstract

Halving the number of global deaths and injuries from road traffic accidents is one target of the Sustainable Development Goals 2030, which is still a challenging problem in Indonesia. However, the majority of research on this topic uses accident-based methods, which limits the safety analysis. Two road safety assessment methods are used to close the gap, with the addition of non-accident-based methods such as Road Safety Audits (RSA). The Margonda Raya Road, which is categorised as a traffic accident blackspot, was selected for the case study. For this, a field survey of the road segment is carried out. To minimise analysis bias, the RSA is conducted and finished first before the accident-based assessment. With the two combined methods, more safety concerns are successfully identified rather than using only one method. Several potential road safety risks were found through RSA, especially the hazard on the pedestrian crossings. For the accident-based method, a blackspot analysis and collision diagram are analysed based on 57 traffic accident data for over 3 years obtained from the Integrated Road Safety Management System (IRSMS). Accident-based data showed major findings of traffic accidents that happened at night with limited lighting. With countermeasures recommendation and implementation, the predicted crash is then calculated using the Crash Modification Factor (CMF). The countermeasures involve installing new solar-powered lighting to remove levelled pedestrian crossings, with a total cost of IDR 178,201,981. Based on the calculation, there is a potential to reduce 80% of the traffic accidents in this road segment. In addition, the calculation using the Benefit-per-Cost Ratio (BCR) showed a good result with a BCR value of 2.6. Improving the lighting is shown to have a potential impact on achieving the SDG targets in this sector and another sector that needs further research.
Traffic Management Analysis and Mitigation of Counter-Flow Violations Using Traffic Conflict Techniques in Alam Sutera, Tangerang Reza Doris Perdana; Sutanto Soehodho; Martha Leni Siregar
INTERNATIONAL JOURNAL ON ADVANCED TECHNOLOGY, ENGINEERING, AND INFORMATION SYSTEM Vol. 5 No. 2 (2026): MAY
Publisher : Transpublika Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55047/ijateis.v5i2.2236

Abstract

Wrong-Way Driving (WWD) by motorcycle riders is a critical safety issue in urban Indonesia, with the Alam Sutera area, Tangerang, recording 1,126 violators in a single peak‑hour observation. This study formulates an integrated traffic management and mitigation strategy for the phenomenon of Wrong-Way Driving (WWD) in the Alam Sutera area. The primary issue is driven by the inefficiency of the legal route (1,800 m) compared to the WWD route (270.1 m), which creates a justification for speculative behavior. Proactive safety analysis using the Swedish Traffic Conflict Technique (TCT) identified an extreme fatality risk with an average Time-to-Accident (TA) value of 0.7 seconds, with 80% of interactions categorized as serious conflicts. Questionnaire analysis based on the Theory of Planned Behavior (TPB) confirmed a critical detour distance threshold at >1,000 m, which serves as a trigger point for driving violations. Evaluation through VISSIM microsimulation (validated with GEH value <  5 and MAPE value < 50% ) shows that Scenario 3 is the most optimal mitigation. By implementing a 1.20 km alternative route via the roundabout, installing permanent physical barriers, and optimizing the traffic signal cycle time from 143 seconds to 90 seconds, the traffic volume load at the conflict point was significantly redistributed. This strategy effectively enhancing operational performance by reducing average delay to 20.34 seconds/vehicle at Level of Service (LOS) C.
Spatial Analysis of Factors Affecting Traffic Accident Frequency in Jakarta Using a Geographically Weighted Regression Approach Gamas Gagah Pangestu; Sutanto Soehodo; Martha Leni Siregar
INTERNATIONAL JOURNAL ON ADVANCED TECHNOLOGY, ENGINEERING, AND INFORMATION SYSTEM Vol. 5 No. 3 (2026): AUGUST
Publisher : Transpublika Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55047/ijateis.v5i3.2240

Abstract

Traffic accidents are a complex issue influenced by road network characteristics, demographics, land use, and traffic conditions. This study analyzes the effects of these factors on accident frequency in DKI Jakarta and examines their spatial variation at the sub-district level. Using secondary data on accidents, road networks, population, land use, traffic, and regional activity, analysis was conducted using global regression (Ordinary Least Squares/OLS) and spatial regression (Geographically Weighted Regression/GWR), considering variations by severity, time period, and lighting. Results show that all factor groups significantly influence accident frequency, with effect magnitudes varying across areas. The GWR model captures local variations better than OLS, reflected by higher R² values in most conditions, while OLS remains effective for explaining global patterns. Findings indicate accident variations are more influenced by differences in the strength of factor effects across regions rather than the types of factors themselves, and are also affected by traffic operational conditions. This confirms that traffic accident characteristics are inherently spatial and contextual. The study highlights the importance of area-specific transportation safety planning, with tailored policy approaches to enhance intervention effectiveness in reducing urban accident rates.
Analysis of Human Error Factors in Traffic Accident (Case Study: Tangerang-Merak Toll Road) Dika Ruslaninur Yadi; Martha Leni Siregar; Sutanto Soehodho
INTERNATIONAL JOURNAL ON ADVANCED TECHNOLOGY, ENGINEERING, AND INFORMATION SYSTEM Vol. 5 No. 2 (2026): MAY
Publisher : Transpublika Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55047/ijateis.v5i2.2230

Abstract

Traffic accidents carry significant social, economic, and public safety consequences. In Indonesia, human error accounts for over 60% of accident cases, based on data from the Indonesian National Police Traffic Corps. The Tangerang-Merak Toll Road, a vital corridor connecting industrial areas and major ports in western Java, has seen a notable increase in accidents in recent years, underscoring the need for a deeper understanding of human error contributions. This study aims to analyze the influence of human error-related factors, including driving behavior, risk perception, environmental factors, and individual characteristics, on traffic accidents on the Tangerang-Merak Toll Road. A quantitative approach using Structural Equation Modeling Partial Least Squares (SEM-PLS) was employed to examine these relationships. Data were collected through observation, literature review, and questionnaires. The model demonstrates strong explanatory power, with an R-square value of 0.606, indicating that 60.6% of the variation in traffic accidents is explained by the included variables. Driving behavior is the most dominant factor, with a path coefficient of 0.669, followed by risk perception (0.248). Environmental factors show a negative relationship (-0.478), suggesting that certain environmental conditions may reduce accident risk. Individual characteristics exhibit smaller and mixed effects, including driving experience (0.134), frequency of toll road usage (-0.149), vehicle type (-0.073), and gender (-0.144).
Driving License Testing Quality and Driver Competence in Urban Traffic Safety Johannes Johannes; Sutanto Soehodho; Martha Leni Siregar
INTERNATIONAL JOURNAL ON ADVANCED TECHNOLOGY, ENGINEERING, AND INFORMATION SYSTEM Vol. 5 No. 2 (2026): MAY
Publisher : Transpublika Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55047/ijateis.v5i2.2233

Abstract

Road traffic accidents remain a pressing public safety concern in rapidly urbanizing cities. In Bekasi City, accident cases rose from 683 in 2022 to 1,146 in 2025, with a growing proportion of perpetrators found to be licensed drivers, raising questions about whether the driving license (SIM) testing system adequately ensures driver competence. This study examines the relationship between the quality of SIM testing and driver competence, focusing on hazard perception, safety knowledge, and driving behavior in Bekasi City. A quantitative approach was employed using Analysis of Variance (ANOVA) within the General Linear Model (GLM) framework, involving 120 respondents: 60 SIM A (car drivers) and 60 SIM C (motorcycle riders). Data were collected through questionnaires based on official SIM training modules. The results show that for SIM A drivers, the model significantly affects hazard perception and safety knowledge (Sig. = 0.000), but not driving behavior (Sig. = 0.102), with R² values of 0.818, 0.568, and 0.197, respectively. For SIM C riders, the model is significant across all variables (Sig. = 0.000), with R² values of 0.696, 0.633, and 0.562. Age and driving experience significantly influence cognitive aspects, while license ownership shows a consistently strong effect (Sig. = 0.000). Questionnaire accuracy ranged from 78% to 92% across all categories. Despite high cognitive scores, a gap persists between knowledge and actual driving behavior, particularly among SIM A drivers. It is recommended that the system incorporate behavior-based evaluations and real-world driving assessments to improve road safety outcomes.
Co-Authors Adhikaratma, Hizkia Ahmad Septiawan Ahmad Septiawan Andyka Kusuma Andyka Kusuma Ari Tri Kusuma Dewi Atissa Dwi Putri Dika Ruslaninur Yadi Fadhliya Afifa Arifin, Fadhliya Afifa Franata, Mhd Tommy Gamas Gagah Pangestu Guritnaningsih Guritnaningsih Heddy R, Agah, Heddy R, Hilda Permatasari Hizkia Adhikaratma Joao Antonio Guterres Johannes Johannes Karina . Muhammad Rifqi Kinansyahputra Mujib Ridha Nugraha, Brian Nararya Nurcahyati, Sekar Warangi Raden Jachrizal Sumabrata Reza Doris Perdana Rian Hendris Saputra Ridha, Mujib RISFIANDI, RIKI Sutanto Soehodho Sutanto Soehodo Tri Tjahjono Tuti Alawiyah