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, 31 March 2023. Please note this Traffic Bulletin is updated every Friday.Unless otherwise stated, closures start at 9pm and finish at 5am.NORTHERN MOTORWAY (SH1)Southbound lanes between Waiwera off-ramp and Silverdale on-ramp, 26–30 MarchOrewa southbound on-ramp, 26–30 MarchMillwater southbound on-ramp, 26–30 MarchNorthbound lanes between Silverdale off-ramp and Waiwera on-ramp, 26-30 March (approx. 10:00pm to 5:00am)Orewa northbound on-ramp, 26-30 MarchSilverdale northbound on-ramp, 26-30 MarchSouthbound lanes between Oteha Valley Road off-ramp and Greville Road on-ramp, 26-28 MarchOteha Valley Road southbound on-ramp, 26-28 MarchSouthbound lanes between Greville Road off-ramp and Constellation Drive on-ramp, 30 MarchGreville Road southbound on-ramp, 30 MarchNorthbound lanes between Greville Road off-ramp and Oteha Valley Road on-ramp, 26-28 March (approx. 9:30pm to 5:00am)Greville Road northbound on-ramp, 26-28 MarchConstellation Drive northbound on-ramp, 29-30 MarchConstellation Drive northbound off-ramp, 26-27 MarchCurran Street northbound on-ramp, 26-30 MarchStafford Road northbound off-ramp, 26-30 March (approx. 9:30pm to 5:00am)CENTRAL MOTORWAY JUNCTION (CMJ)Hobson Street southbound on-ramp, 30 MarchHobson Street westbound on-ramp, 30 MarchSH1 northbound to SH16 westbound link, 30 March (approx. 10:00pm to 5:00am)SH16 eastbound to SH1 northbound link, 26 March (approx. 08:00pm to 05:00am)SH16 eastbound to SH1 southbound link, 26 March (approx. 08:00pm to 05:00am)SH 16 eastbound to SH 16 (Port) link, 26 March (approx. 08:00pm to 05:00am)SH16 eastbound to SH1 northbound link, 27-30 MarchSH16 eastbound to SH1 southbound link, 27-30 MarchSH16 eastbound to SH16 (Port) link, 30 March (approx. 10:00pm to 5:00am)Westbound lanes between Stanley Street off-ramp and Grafton Road on-ramp, 30 March (approx. 10:00pm to 5:00am)Wellesley Street East westbound on-ramp, 30 MarchSH16 (Port) westbound to SH1 northbound link, 30 March (approx. 10:00pm to 5:00am)SH16 westbound (Port) to SH16 westbound, 30 March (approx. 10:00pm to 5:00am)SOUTHERN MOTORWAY (SH1)Northbound lanes between Manukau off-ramp and East Tamaki Road on-ramp, 27 March (approx. 10:00pm to 5:00am)Te Irirangi Drive northbound on-ramp, 27 MarchManukau northbound on-ramp, 27 MarchSouthbound lanes between Takanini off-ramp and Drury/SH22 on-ramp, 26 MarchTakanini southbound on-ramp, 26 MarchSouthbound lanes between Papakura off-ramp and Drury/SH22 on-ramp, 27-30 MarchPapakura southbound on-ramp, 27-30 MarchPapakura northbound (loop) on-ramp, 26-30 MarchSouthbound lanes between Drury/SH22 off-ramp and Bombay on-ramp, 29-30 MarchDrury/SH22 southbound on-ramp, 26-30 MarchRamarama southbound on-ramp, 29-30 MarchNorthbound lanes between Ramarama off-ramp and Papakura on-ramp, 26 & 28-30 MarchNorthbound lanes between Ramarama off-ramp and Drury/SH22 on-ramp, 27 MarchDrury/SH22 northbound on-ramp, 26-30 March Ramarama northbound on-ramp, 26-30 MarchBombay southbound on-ramp, 28 March (approx. 9:30pm to 5:00am)Beaver Road southbound off-ramp, 28 March (approx. 9:30pm to 5:00am)Beaver Road southbound on-ramp, 28 March (approx. 9:30pm to 5:00am)Nikau Road southbound off-ramp, 28 March (approx. 9:30pm to 5:00am)Southbound lanes between Nikau Road off-ramp and Nikau Road on-ramp, 26 March (approx. 9:30pm to 5:00am)Northbound lanes between Nikau Road off-ramp and Nikau Road on-ramp, 26 March (approx. 9:30pm to 5:00am)Razorback Road southbound off-ramp, 26 March (approx. 9:30pm to 5:00am)SH1 southbound to SH2 eastbound link, 26 March (approx. 9:30pm to 5:00am)Southbound lanes between Pokeno off-ramp and Pokeno on-ramp, 26 March (approx. 9:30pm to 5:00am)Northbound lanes between Pokeno off-ramp and Pokeno on-ramp, 26 March (approx. 9:30pm to 5:00am)NORTHWESTERN MOTORWAY (SH16)Lincoln Road northbound on-ramp, 26-30 MarchEastbound lanes between St Lukes Road off-ramp and SH1/SH16 links, 26 March (approx. 8:00pm to 5:00am)Eastbound lanes between St Lukes Road off-ramp and SH1/SH16 links, 27-30 MarchSt Lukes Road eastbound on-ramp, 26 March (approx. 8:00pm to 5:00am)St Lukes Road eastbound on-ramp, 27-30 MarchSH16 Newton Road westbound on-ramp, 30 MarchSt Lukes Road westbound on-ramp, 30 MarchSH16 westbound to SH20 southbound link, 30 March (approx. 10:00pm to 5:00am)UPPER HARBOUR MOTORWAY (SH18)Paul Mathews Drive westbound on-ramp, 27 & 30 MarchPaul Mathews Drive eastbound off-ramp, 28 MarchSH18 to SH1 link, 29 MarchSOUTHWESTERN MOTORWAY (SH20)Southbound lanes between Walmsley Road off-ramp and Massey Road on-ramp, 28 March (approx. 10:00pm to 5:00am)Walmsley Road southbound on-ramp, 28 MarchSouthbound lanes between Mahunga Drive off-ramp and Walmsley Road on-ramp, 30 March (approx. 10:00pm to 5:00am)Southbound lanes between Lambie Drive off-ramp and SH1 link, 27 March (approx. 10:00pm to 5:00am)Lambie Drive southbound on-ramp, 27 MarchSH20 southbound to SH1 northbound link, 27 March (approx. 10:00pm to 5:00am)SH20 southbound to SH1 southbound link, 27 March (approx. 10:00pm to 5:00am)