Yuttana Phithak, Director of Phuket Highways Office, announced the need to close the underpass late yesterday afternoon.
On behalf of the Phuket Highways Office, Mr Yuttana apologised for any inconvenience caused by the closure.
Mr Yuttana yesterday afternoon also announced the closure of the outside lane on the road over Kata Hill (Route 4028) tomorrow so that power poles can be removed from beside the road.
The section of lane to be closed, from 9am to 4pm, is from km.1+575 to km.2+300 around the Khuan Sato curve, westbound heading from Chalong to Karon.
Mr Yuttana again apologised for any inconvenience caused.