The Expressway Authority of Thailand (EXAT) has put forth a proposal for an underground expressway, aiming to replace a contentious section of the N1 Expressway development. The proposal came after an extensive 17-month initial feasibility study.
EXAT Governor Surachet Laophulsuk revealed this plan during the project’s second hearing, stating that multiple factors such as engineering, investment costs, and environmental impact, were thoroughly evaluated. The result revealed that an underpass was the most viable option.
This proposed 6.7 kilometre underpass would be Thailand’s maiden expressway tunnel. It would stretch along Ngarmwongwan Road via Phongphet Intersection, Bang Khen Intersection, and Kaset Intersection to Prasertmanukit Road, before connecting with the N2 Expressway.
Surachet explained that among the three options studied,…
