Phuket studies widening of Highway 402 gateway road
Phuket is studying the widening of a 2.3-kilometre stretch of Highway 402 between Sarasin Bridge and Tha Chatchai checkpoint, with a design and impact study due in June 2027.
Phuket authorities are studying plans to widen the island’s main gateway road, with a 15-month review under way for a 2.3-kilometre section of Highway 402 between Sarasin Bridge and the Tha Chatchai checkpoint.
Officials recently reviewed the survey and design work for the route, which is the main road link between Phuket and the mainland. The Department of Highways is examining an upgrade to four or more lanes as traffic volumes grow, with the stated aims of reducing congestion and improving road safety for motorists entering and leaving the province.
According to the source, the study began in March and is due for completion in June 2027. It covers engineering surveys, bridge and drainage design, intersection improvements and preparation of an environmental impact assessment.
Consultants told the meeting that the route runs through mangrove and coastal areas, meaning environmental impacts will need careful review. They said sensitive sites in Tha Chatchai and Ban Tha Nun, including communities, schools, temples, mosques and childcare centres, would also be taken into account.
Several options are being assessed, including a four-lane highway with a raised median, a depressed median and an elevated road section. The highways department said public consultations would be held throughout the study period before a final design is chosen.
The road project is part of Phuket’s longer-term transport infrastructure planning to support economic growth and tourism expansion. Funding for the expansion will be sought after the study and environmental assessment are completed, according to former governor Nirat Pongsitthaworn.
