IF articles

Summary - Transit-oriented development (TOD) at high-speed rail (HSR) and urban rail transit (URT) stations can reduce private-vehicle dependence, but its operational effects are often difficult to distinguish from those of accompanying infrastructure and traffic-management measures. This study develops a transferable two-level traffic impact assessment framework for railway-station areas in Ho Chi Minh City, coupling a four-step macroscopic travel-demand model with PTV VISSIM vehicle and pedestrian microsimulation. The broader assessment addresses both urban-rail station areas and planned HSR interchange conditions, while Thao Dien Station on Metro Line 1 is used for detailed 2030 testing. The inputs combine the 2019 base travel-demand model, the 2025 recalibrated modal structure, 2030 land-use and network plans, observed mixed-traffic composition, intersection geometry, signal control, pedestrian demand, and locally adapted driver-behaviour parameters. Two 2030 scenarios are compared: a reference condition without TOD-based reorganisation and an integrated TOD scenario. An intervention-to-parameter mapping distinguishes the mechanisms associated with land-use intensification, public-transport integration, active-mobility provision, access infrastructure, and operational management. The integrated scenario reduces link V/C ratios by approximately 0.01–0.08, increases average speed from 20.67 to 21.50 km/h, decreases average delay from 19.24 to 18.50 s/veh, reduces aggregate network delay from 187 to 175 veh-h, and lowers the number of stops from 3,184 to 3,061. Pedestrian waiting time increases nonlinearly with demand, supporting grade separation or signal priority at critical crossings. A screening-level sensitivity analysis, in which demand is varied by ±10%, indicates that the comparative scenario ranking is retained, although the absence of an independent hold-out dataset limits the interpretation of absolute forecasts. The study contributes a transparent and replicable workflow for assessing TOD-related traffic and accessibility effects at HSR and URT station areas, with explicit separation of transferable procedures and locally calibrated parameters. 
 

https://www.medra.org/servlet/view?lang=it&doi=10.57597/IF.10.2026.ART.2