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 Thursday, 6 April 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, 2-5 AprilOrewa southbound on-ramp, 2-6 AprilMillwater southbound on-ramp, 2-6 AprilSouthbound lanes between Waiwera off-ramp and Silverdale on-ramp, 6 April (approx. 11:00pm to 5:00am)Orewa southbound on-ramp, 6 April (approx. 10:00pm to 5:00am)Millwater southbound on-ramp, 6 April (approx. 10:00pm to 5:00am)Northbound lanes between Silverdale off-ramp and Waiwera on-ramp, 2-5 April (approx. 10:00pm to 5:00am)Orewa northbound on-ramp, 2-5 AprilSilverdale northbound on-ramp, 2-5 AprilNorthbound lanes between Silverdale off-ramp and Waiwera on-ramp, 6 April (approx. 11:00pm to 5:00am)Orewa northbound on-ramp, 6 April (approx. 10:00pm to 5:00am)Silverdale northbound on-ramp, 6 April (approx. 10:00pm to 5:00am)Southbound lanes between Oteha Valley Road off-ramp and Greville Road on-ramp, 4 AprilOteha Valley Road southbound on-ramp, 4 AprilSouthbound lanes between Greville Road off-ramp and Tristram Avenue on-ramp, 3 AprilGreville Road southbound on-ramp, 3 AprilConstellation Drive southbound on-ramp, 2-3 AprilNorthbound lanes between Greville Road off-ramp and Oteha Valley Road on-ramp, 5 April (approx. 9:30pm to 5:00am)Greville Road northbound on-ramp, 5 AprilConstellation Drive southbound off-ramp, 2 & 5 AprilConstellation Drive southbound on-ramp, 5 AprilConstellation Drive northbound on-ramp, 4 AprilSouthbound lanes between Esmonde Road off-ramp and Onewa Road on-ramp, 3-4 April (approx. 10:00pm to 5:00am)Esmonde Road southbound on-ramp, 3-4 AprilEsmonde Road northbound on-ramp, 2-5 AprilEsmonde Road (loop) northbound on-ramp, 2-5 AprilCurran Street northbound on-ramp, 2 AprilStafford Road northbound off-ramp, 2 AprilCENTRAL MOTORWAY JUNCTION (CMJ)SH1 northbound to SH16 westbound link, 2 April (approx. 10:00pm to 5:00am)Hobson Street southbound on-ramp, 2 AprilHobson Street westbound on-ramp, 2 AprilWestbound lanes between Stanley Street off-ramp and Grafton Road on-ramp, 2 AprilWellesley Street East westbound on-ramp, 2 AprilSH16 (Port) westbound to SH1 northbound link, 2 April (approx. 10:00pm to 5:00am)SH16 westbound (Port) to SH16 westbound link, 2 April (approx. 10:00pm to 5:00am)SOUTHERN MOTORWAY (SH1)Southbound lanes between Greenlane off-ramp and Ellerslie on-ramp, 5 April (approx. 11:00pm to 5:00am)Greenlane southbound on-ramp, 5 April (approx. 10:00pm to 5:00am)South Eastern Highway (SEART) southbound off-ramp, 4 AprilSouthbound lanes between Manukau off-ramp and Takanini on-ramp, 4 April (approx. 10:00pm to 5:00am)SH1 southbound to SH20 northbound link, 4 April (approx. 10:00pm to 5:00am)Manukau southbound on-ramp, 4 AprilNorthbound lanes between Takanini off-ramp and Takanini on-ramp, 2 & 5 AprilPapakura southbound off-ramp, 2 AprilNorthbound lanes between Ramarama off-ramp and Papakura on-ramp, 2-5 AprilPapakura northbound loop on ramp, 2-5 AprilDrury/SH22 northbound on-ramp, 2-5 AprilRamarama northbound on-ramp, 2-5 AprilPokeno southbound off-ramp, 2-3 AprilNORTHWESTERN MOTORWAY (SH16)Lincoln Road northbound on-ramp, 2-5 AprilNorthbound lanes between Rosebank Road off-ramp and Te Atatu on-ramp, 2 AprilPatiki Road northbound on-ramp, 2 AprilEastbound lanes between St Lukes Road off-ramp and SH1/SH16 links, 2-5 April (approx. 10:00pm to 5:00am)Newton Road westbound on-ramp, 2 & 4-5 AprilUPPER HARBOUR MOTORWAY (SH18)SH18 eastbound to SH1 northbound link, 4 AprilEastbound lanes between Tauhinu Road off-ramp and Greenhithe Road on-ramp, 3 April (approx. 10:00pm to 5:00am)Westbound lanes between Greenhithe Road off-ramp and Tauhinu Road on-ramp, 3 April (approx. 10:00pm to 5:00am)Squadron Drive eastbound on-ramp, 3 AprilSOUTHWESTERN MOTORWAY (SH20)Hillsborough Road northbound on-ramp, 2-5 AprilNeilson Street northbound off-ramp, 2-4 April (approx. 10:00pm to 5:00am)Rimu Road northbound on-ramp, 2-4 AprilSouthbound lanes between Lambie Drive off-ramp and SH1 links, 4 April (approx. 10:00pm to 5:00am)Lambie Drive southbound on-ramp, 4 AprilSH20 southbound to SH1 northbound link, 4 April (approx. 10:00pm to 5:00am)SH20 southbound to SH1 southbound link, 4 April (approx. 10:00pm to 5:00am)