Yuttana Phithak, Director of Phuket Highways Office, announced the need to close the underpass late yesterday afternoon (Sept 14).
On behalf of the Phuket Highways Office, Mr Yuttana apologised for any inconvenience caused by the closure.
The underpass last closed in August so that repairs could be made on pumps installed inside the tunnel.
In June the tunnel closed for 10 days so that the road through the underpass could be resurfaced.