ESTABLISHING A TRAFFIC IMPACT ASSESSMENT MODEL FOR LARGE-SCALE URBAN CONSTRUCTION PROJECTS IN VIETNAM

Abstract

The accelerated pace of urbanization in Vietnam has led to growing concerns about traffic congestion, especially in areas undergoing large-scale construction. This paper presents a structured and practical framework for conducting Traffic Impact Assessments (TIA) tailored to major urban construction projects. By leveraging both macroscopic and microscopic simulation tools VISUM and VISSIM we provide a robust methodology to forecast, assess, and mitigate traffic impacts from proposed developments. The framework centers on critical peak hours (7- 8 AM and 5- 6 PM) to capture the most severe traffic conditions. Data inputs include socio-economic indicators, base-year traffic volumes, and spatial configurations from major Vietnamese cities like Hanoi. The simulation results highlight the stark contrast in Level of Service (LOS), delay times, and queue lengths across three scenarios: existing conditions, post-development without mitigation, and post-development with interventions. Our findings emphasize the necessity of early-stage traffic modeling in urban planning and advocate for the institutionalization of simulation-based TIA in Vietnamese regulatory practice. This study offers urban planners, policymakers, and traffic engineers a replicable model for integrating transportation considerations into the design and approval process of large-scale developments.