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, 18 August 2023.Unless otherwise stated, closures start at 9pm and finish at 5am.NORTHERN MOTORWAY (SH1)Southbound lanes between Silverdale off-ramp and Oteha Valley Road on-ramp, 20-22 AugustSilverdale southbound on-ramp, 20-22 AugustConstellation Drive northbound on-ramp, 21 August (approx. 9:30pm to 5:00am)Constellation Drive southbound off-ramp, 21 August (approx. 9:30pm to 5:00am)Northbound lanes between Northcote Road off-ramp and Constellation Drive on-ramp, 22-24 August (approx. 9:30pm to 5:00am)Tristram Avenue northbound on-ramp, 22-24 August (approx. 9:30pm to 5:00am)Northcote Road northbound on-ramp, 22-24 August (approx. 9:30pm to 5:00am)CENTRAL MOTORWAY JUNCTION (CMJ)Hobson Street westbound on-ramp, 21 AugustSH1 southbound to SH16 westbound link, 21 August (approx. 10:00pm to 5:00amSH1 southbound to SH16 eastbound (Port) link, 23 August (approx. 10:00pm to 5:00am)SH16 eastbound to SH1 northbound link, 23 August (approx. 10:00pm to 5:00am)SH16 eastbound to SH1 southbound link, 23 August (approx. 10:00pm to 5:00am)SH 16 eastbound to SH16 (Port) link, 23 August (approx. 10:00pm to 5:00am)SH1 northbound to SH16 westbound link, 21 August (approx. 10:00pm to 5:00am)Westbound lanes between Stanley Street off-ramp and Great North Road on-ramp, 21 August (approx. 10:00pm to 5:00am)SH16 (Port) westbound to SH1 northbound link, 21 AugustSH16 (Port) westbound to SH1 southbound link, 21 AugustWellesley Street East westbound on-ramp, 21 AugustSOUTHERN MOTORWAY (SH1)Southbound lanes between Takanini off-ramp and Drury/SH22 on-ramp, 23-24 AugustTakanini southbound on-ramp, 23-24 AugustSouthbound lanes between Papakura off-ramp and Drury/SH22 on-ramp, 20-22 AugustPapakura southbound on-ramp, 18-26 August (24/7)Northbound lanes between Drury/SH22 off-ramp and Papakura on-ramp, 23-24 AugustDrury/SH22 northbound on-ramp, 23-24 AugustDrury/SH22 northbound off-ramp, 20 August (approx. 5:00am to 07:00pm)Northbound lanes between Ramarama off-ramp and Drury/SH22 on-ramp, 21-22 AugustRamarama northbound on-ramp, 21-22 AugustBeaver Road northbound on-ramp, 24 AugustBeaver Road northbound off-ramp, 24 AugustNikau Road northbound on-ramp, 24 AugustPokeno southbound off-ramp, 20 August (approx. 10:00pm to 5:00am)Pokeno southbound on-ramp, 20 August (approx. 10:00pm to 5:00am)Pioneer Road southbound off-ramp, 20 August (approx. 10:00pm to 5:00am)Southbound lanes between Mercer off-ramp and Mercer on-ramp, 20 August (approx. 10:00pm to 5:00am)Northbound lanes between Mercer off-ramp and Mercer on-ramp, 20 August (approx. 10:00pm to 5:00am)NORTHWESTERN MOTORWAY (SH16)Southbound lanes between Brigham Creek Road roundabout and Hobsonville Road on-ramp, 20-21 AugustNorthbound lanes between Hobsonville Road off-ramp and Brigham Creek Roundabout, 20-21 AugustSouthbound lanes between Lincoln Road off-ramp and Te Atatu Road on-ramp, 20 August (approx. 10:00pm to 5:00am)Southbound lanes between Lincoln Road off-ramp and Great North Road on-ramp, 22 August (approx. 10:00pm to 5:00am)Lincoln Road southbound on-ramp, 20 & 22 AugustTe Atatu Road (Loop) southbound on-ramp, 22 AugustTe Atatu Road (Diamond) southbound on-ramp, 22 AugustRosebank Road southbound on-ramp, 22 AugustEastbound lanes between Great North Road off-ramp and Grafton Road on-ramp, 23 August (approx. 10:00pm to 5:00am)Great North Road eastbound on-ramp, 23 AugustSt Lukes Road eastbound on-ramp, 23 AugustSH16 eastbound to SH20 southbound link (Waterview southbound tunnel closed), 21 - 22 AugustGreat North Road eastbound off-ramp (Waterview southbound tunnel closed), 21 - 22 AugustSH16 westbound to SH20 southbound link (Waterview Southbound tunnel closed) 21 - 22 AugustSt Lukes Road westbound on-ramp, 21 AugustNewton Road westbound on-ramp, 21 AugustUPPER HARBOUR MOTORWAY (SH18)Brigham Creek Road eastbound on-ramp, 20-22 August (approx. 8:00pm to 5:00amSOUTHWESTERN MOTORWAY (SH20)Northbound lanes between Maioro Street off-ramp and SH16 links (Waterview northbound tunnel closed), 23 & 24 AugustMaioro Street northbound on-ramp (Waterview northbound tunnel closed), 23 & 24 AugustHillsborough Road northbound off-ramp, 21 & 24 AugustSouthbound lanes between Puhinui Road off-ramp and Puhinui Road on-ramp, 20 August