International Journal of Traffic Management in Transportation Network (p: 3107-9504)

Assessment and Improvement of Urban Traffic Performance in Gulshan 2, Dhaka, Using PTV Vissim

2025-11-21T04:30:33+00:00

This study looks at ways to reduce traffic congestion in Dhaka’s Gulshan-2 area using PTV Vissim microsimulation. Researchers collected real-world data from the intersection and 12 road segments over three weeks through field surveys and video analysis. The initial analysis showed heavy congestion, with vehicles delayed an average of 92.3 seconds and taking 714.6 seconds to travel during peak hours. To address this, the team tested reducing the signal cycle time from 45 to 30 seconds and adding four service roads. These changes led to a 38.5% drop in delay, a 30.1% decrease in travel time, a 42-meter shorter queue, and a 27% increase in vehicle throughput. The results were checked for accuracy using LPR data and manual counts. Overall, the findings suggest that combining infrastructure improvements with better signal timing can make traffic flow much more efficiently in busy urban areas like Dhaka, helping guide future policy and planning.

Evaluating Intersection Efficiency through NURS-derived PCU Values and the Indo-HCM Methodology: A Case Study at Kamalbinayak

2025-07-02T08:38:42+00:00

This study presents a detailed evaluation of the unsignalized Kamalbinayak intersection in Bhaktapur, Nepal, using traffic flow data based on the Nepal Urban Road Standard (NURS) and analytical methods from the Indian Highway Capacity Manual (Indo-HCM). The intersection connects three major roads Byasi, Nagarkot, and Chyamasingh and was observed over six days during peak traffic hours. Observations included vehicle types, turning movements, and geometric features, with all data converted into passenger car units (PCUs) for standardized analysis. The practical capacity of each leg was estimated by adjusting NURS values to account for conditions such as roadside parking and moderate frontage access. The level of service (LOS) was calculated using volume-to-capacity (V/C) ratios, which ranged from 1.3 to 2.1, indicating that all approaches were operating beyond their capacity. Each leg was consistently rated LOS ‘F’, reflecting severe congestion and significant delays. These findings indicate that the current intersection design is inadequate for present-day traffic, particularly under mixed-traffic conditions. The study recommends improvements such as signalization, intersection redesign, and better queue management. This integrated use of NURS and Indo-HCM also offers a replicable method for assessing intersection performance in other developing urban settings.

The Impact of Various Factors on Road Accidents with Statistical Analysis in Bangladesh

2025-05-28T20:13:05+00:00

In Bangladesh, Bangladesh Jatri Kalyan Samity (BJKS) reports that in the last five years, 28557 traffic accidents have claimed the lives of around 32541 persons. Roughly, 90% of those collisions were caused by the driver’s error or shortcoming. This study aimed to identify the risk factors associated with drivers and vehicles for auto accidents in Bangladesh. In this study, an analysis of police-reported accident data has been conducted to assess trends in traffic accidents and fatalities, examining the annual total number of accidents and registered vehicles. Then, as primary independent variables, we selected a few risk factors, such as driving while intoxicated, health issues, driving while unlawful, exhaustion, gender, type of vehicle, overload, brake problems, professional driver status, weather, and time attribute, among others. In pedestrian and non-motor vehicle accidents, the three most frequent factors were age, administrative division, and time of year. The Bangladesh Road Transport Authority (BRTA) and the Bangladesh Roads and Highway Authority provided us with the data. We answered a poll about a few drivers. Next, we examined every report to identify some elements strongly linked to road accidents. We employ statistical analysis. We also use the multiple regression method to determine a relation. Road length is not appropriately expanded, which is one of the many important elements that impact road accidents. Other important factors that influence road accidents include driver fatigue and excessive driving time. After that analysis, we identified the factors influencing Bangladeshi traffic accidents.

Performance Evaluation and Improvement of Four-Legged Intersection: A Case Study of Satdobato Intersection of Kathmandu Valley, Nepal

2025-09-04T10:21:30+00:00

Due to the higher traffic volume and limited opportunities for infrastructure enhancement, the Satdobato intersection in the Kathmandu Valley experiences extreme congestion, especially during peak hours. This study analyzes the current operating performance of the intersection through the SIDRA Intersection 8 simulation software and suggests ways to enhance it. Traffic data were obtained through videography and manually calculated to find peak hour volumes, saturation flow, and back-of-queue lengths. The base model was calibrated and validated using real data. Two alternatives were explored: (1) constructing a flyover between the Mahalaxmisthan and Gwarko approaches, and (2) implementing lead-right signal phasing with optimal timing. With the existing setup, the intersection was at Level of Service (LOS) F, with average vehicle delay at 238.2 seconds and degree of saturation at 1.320. The flyover scenario improved the performance to LOS C with a delay of 30.6 seconds, and the signal optimization timing scenario yielded LOS E with a delay of 76.7 seconds. The alternative flyover exhibited the highest improvement at that intersection. This research recommends considering pedestrian volumes, coordination between adjacent intersections, and the application of newer versions of software for fuller analysis.

Solutions to Improve HSE Principles in Road Projects: A Comprehensive Review

2025-07-02T08:19:16+00:00

Injuries related to non-compliance with Health, Safety, and Environment (HSE) principles at road construction sites cause a significant number of casualties worldwide each year. This study redefines HSE concepts specifically for the road construction industry and highlights their critical importance to society. The research evaluates various approaches to implementing effective HSE strategies in this sector. Furthermore, it investigates the causes of injuries and identifies legal gaps due to insufficient specialized knowledge of relevant laws. By consulting industry professionals, forensic experts, and labor and social security specialists, and analyzing statistics from related organizations, this study proposes practical solutions aimed at minimizing the human and financial impacts of workplace injuries. The assessment framework considers the entire lifecycle of road projects, including design, operation, maintenance, and expansion phases. Finally, this paper provides a comprehensive review of HSE practices in road projects, identifies current research challenges, and suggests future directions for improving HSE implementation in the industry.