The first full weekend closure of a vital stretch of the A78 begins tonight.

Resurfacing work is being carried out between the Southannan and Hunterston roundabouts, and a diversion will be in place.

The stretch will be completely closed from 9pm on Friday March 17 until 6am on Monday March 20.

A signed diversion will be in place throughout the closure periods.

Traffic heading north from the Three Towns and Irvine areas will be directed off the A78 at the Chapel Hill roundabout and on to the B780 to Dalry, then on to the B784 towards Largs and the westbound A760, rejoining the A78 at the Haylie Brae in Largs.

Traffic heading south from the Inverclyde and Largs areas will follow the same diversion route but in reverse.

Access will still be available to Clydeport from the north, and emergency vehicles will be allowed access throughout the work.