Effective Traffic Impact Assessment and Enhancing Sustainable Tourism Logistics: A Case Study of Burapha Chollatit Scenic Road in the Eastern Economic Corridor

Background Coastal tourism corridors experience variable traffic demand and require assessment approaches that account for weekend travel, access constraints, and environmentally sensitive locations. This study examines traffic impact assessment (TIA) for the Burapha Chollatit Scenic Road Phase 2 project in Rayong Province, in Thailand’s Eastern Economic Corridor. Methods A case-study assessment draws on traffic counts, non-participant site observations, project engineering documentation, and secondary tourism and environmental information. Road-segment and intersection operations were examined using volume-to-capacity (V/C) ratios, control delay, and level-of-service indicators under weekday and weekend/holiday peak scenarios. Forecast improvement scenarios are distinguished from observed baseline conditions. Results Under the proposed road and junction improvements, modelled segment V/C ratios decreased from approximately 0.80–0.84 to 0.55–0.70, and average weekend-peak intersection control delay decreased from 88 to 34 seconds per vehicle. The original project materials also report tourism-demand and economic-benefit estimates; these are not independently verified post-construction outcomes and depend on the stated scenario assumptions. Conclusions Traffic counting combined with scenario-based operational assessment can inform the planning of coastal tourism corridors. Interpretation should distinguish measured baseline conditions from modelled future conditions; additional post-implementation counts and model calibration are needed to establish realised impacts.