THE Pen-y-Clip tunnel on the A55 between Conwy and Bangor will be subject to overnight closures for four nights.

The closures will start at 7pm on Monday March 16, and last night until 7am each morning. The closures are to allow maintenance work to be carried out.

Traffic will be diverted using a contra flow, but there will be a width restriction of 3.2 metres in place during the closures.