Waka Kotahi NZ Transport Agency advises of the following closures for motorway improvements. Work delayed by bad weather will be completed at the next available date, prior to Friday 19, May 2023.Unless otherwise stated, closures start at 9pm and finish at 5am.NORTHERN MOTORWAY (SH1)Southbound lanes between Waiwera off-ramp and Silverdale on-ramp, 14-18 May (approx. 10:00pm to 5:00am)Orewa southbound-ramp, 14-18 MayMillwater southbound on-ramp, 14-18 MayNorthbound lanes between Silverdale off-ramp and Waiwera on-ramp, 14-18 May (approx. 10:00pm to 5:00am)Orewa northbound on-ramp, 14-18 MaySilverdale northbound on-ramp, 14-18 MaySouthbound lanes between Oteha Valley Road off-ramp and Greville Road southbound on-ramp, 14-18 MayOteha Valley Road southbound on-ramp, 14-18 MayNorthbound lanes between Greville Road off-ramp and Oteha Valley Road on-ramp, 14 & 16-18 May (approx. 9:30pm to 5:00)Greville Road northbound on-ramp, 14 & 16–18 MaySH1 southbound to SH18 westbound link, 16 MayConstellation Drive southbound on-ramp, 14 MayConstellation Drive northbound off-ramp, 17 MayNorthbound lanes between Northcote Road off-ramp and Constellation Drive on-ramp, 15 MayTristram Avenue northbound on-ramp, 15 MayNorthcote Road northbound on-ramp, 15 MayEsmonde Road (Diamond) northbound on-ramp, 14 & 17 MayEsmonde Road northbound off-ramp, 18 MayCENTRAL MOTORWAY JUNCTION (CMJ)Hobson Street southbound on-ramp, 16-17 MayHobson Street westbound on-ramp, 16-17 MaySH16 eastbound to SH1 southbound link, 16-17 May (approx. 10:00pm to 5:00am)Symonds Street southbound on-ramp, 16-17 MayWestbound lanes between Stanley Street off-ramp and Wellesley Street East on-ramp, 16-17 May (approx. 10:00pm to 5:00am)Grafton Road southbound on-ramp, 16-17 MaySH16 (Port) westbound to SH1 southbound link, 16-17 May (approx. 10:00pm to 5:00am)SH1 northbound to SH16 eastbound (Port) link, 15 MaySymonds Street northbound off-ramp, 15 MaySOUTHERN MOTORWAY (SH1)Southbound lanes between Fanshawe Street off-ramp and Greenlane on-ramp, 16-17 May (approx. 10:00pm to 5:00am)Khyber Pass Road southbound on-ramp, 16-18 MayGillies Avenue southbound off-ramp, 18 MaySt Marks Road southbound on-ramp, 16-17 MayHill Road northbound on-ramp, 18 MayPapakura (Loop) northbound on ramp, 14-18 MaySouthbound lanes between Papakura off-ramp and Drury/SH22 on-ramp, 14-18 MayPapakura southbound on-ramp, 14-18 MayNorthbound lanes between Ramarama off-ramp and Papakura on-ramp, 14-18 MayDrury/SH22 northbound on-ramp, 14-18 MayRamarama northbound on-ramp, 14-18 MayBeaver Road northbound on-ramp, 17 MayBeaver Road northbound off-ramp, 17 MayNikau Road northbound on-ramp, 17 MayPokeno southbound on-ramp, 14 MaySouthbound lanes between Mercer off-ramp and Mercer on-ramp, 18 May (approx. 10:00pm to 5:00am)Northbound lanes between Mercer off-ramp and Mercer on-ramp, 18 May (approx. 10:00pm to 5:00am)NORTHWESTERN MOTORWAY (SH16)Southbound lanes between Brigham Creek Roundabout and Lincoln Road on-ramp, 14 May (approx. 10:00pm to 5:00am)Southbound lanes between Hobsonville Road off-ramp and Lincoln Road on-ramp, 14 MayHobsonville Road southbound on-ramp, 14 MayRoyal Road southbound on-ramp, 14 MayNorthbound lanes between Lincoln Road off-ramp and Brigham Creek Roundabout, 14 May (approx. 10:00pm to 5:00am)Lincoln Road northbound on-ramp, 14-18 MayLincoln Road southbound off-ramp, 15-18 MayRosebank Road eastbound on-ramp, 14 MayGreat North Road eastbound off-ramp, 16 MayUPPER HARBOUR MOTORWAY (SH18)Paul Matthews Road westbound on-ramp, 16 MayAlbany Highway eastbound off-ramp, 18 MaySOUTHWESTERN MOTORWAY (SH20)Neilson Street northbound off-ramp, 15-16 May (approx. 10:00pm to 5:00am)Rimu Road northbound on-ramp, 15-16 MayNorthbound lanes between Walmsley Road off-ramp and Massey Road on-ramp, 16 May (approx. 10:00pm to 5:00am)Walmsley Road northbound on-ramp, 16 MayCavendish Drive northbound on-ramp, 16 May