NZ Transport Agency Waka Kotahi advises of the following closures for motorway improvements. Work delayed by bad weather will be completed at the next available date, prior to Friday, 4 April 2025. Unless otherwise stated, closures start at 9pm and finish at 5am. Traffic management may be in place before the advertised closure times for the mainline. NORTHERN MOTORWAY (SH1)Southbound lanes between Silverdale off-ramp and Oteha Valley Road on-ramp, 1-3 AprilSilverdale southbound on-ramp, 1-3 AprilNorthbound lanes between Oteha Valley Road off-ramp and Silverdale on-ramp, 1-3 AprilOteha Valley Road northbound on-ramp, 1-3 AprilOnewa Road northbound off-ramp, 30 March - 3 April (approx. 10:00pm to 5:00am)Stafford Road northbound off-ramp, 30 March - 3 AprilCurran Street northbound on-ramp, 30 March - 3 April CENTRAL MOTORWAY JUNCTION (CMJ)Westbound lanes between Tamaki Drive and Beach Road/Parnell Rise, 30 March – 1 April & 3 April (approx. 10:00pm to 5:00am)Westbound lanes between Tamaki Drive and Beach Road/Parnell Rise, 2 April (approx. 11:59pm to 5:00am)Eastbound lanes between Beach Road and Tamaki Drive, 30 March – 1 April & 3 April (approx. 10:00pm to 5:00am)Eastbound lanes between Beach Road and Tamaki Drive, 2 April (approx. 11:59pm to 5:00am) SOUTHERN MOTORWAY (SH1)Papakura (Diamond) northbound on-ramp, 30 March - 1 AprilPapakura (Loop) southbound on-ramp, 30 March - 1 AprilSouthbound lanes between Papakura off-ramp and Drury/SH22 on-ramp, 2-3 AprilPapakura (Loop) southbound on-ramp, 2-3 AprilPapakura (Diamond) southbound on-ramp, 2-3 AprilNorthbound lanes between Ramarama off-ramp and Papakura on-ramp, 2-3 AprilDrury/SH22 northbound on-ramp, 2-3 AprilRamarama northbound on-ramp, 2-3 AprilNorthbound lanes between Ramarama off-ramp and Drury/SH22 on-ramp, 31 MarchRamarama northbound on-ramp, 31 MarchDrury/SH22 southbound off-ramp, 30-1 AprilDrury/SH22 southbound on-ramp, 30-1 AprilSouthbound lanes between Mercer off-ramp and Mercer on-ramp, 2 April (approx. 10:00pm to 5:00am)Northbound lanes between Mercer off-ramp and Mercer on-ramp, 2 April (approx. 10:00pm to 5:00am)NORTHWESTERN MOTORWAY (SH16)Southbound lanes between Waimauku roundabout and Trigg Road, 1 April (approx. 8:00pm to 5:00am)Northbound lanes between Trigg Road and Waimauku roundabout, 1 April (approx. 8:00pm to 5:00am)Southbound lanes between Brigham Creek Road Roundabout and Hobsonville Road on-ramp, 30 March (approx. 10:00pm to 5:00am)Newton Road westbound on-ramp, 30 March - 3 April UPPER HARBOUR MOTORWAY (SH18)Westbound lanes between Albany Highway off-ramp and Tauhinu Road on-ramp, 31 MarchAlbany Highway westbound on-ramp, 31 MarchSquadron Drive westbound off-ramp, 31 MarchEastbound lanes between Tauhinu Road off-ramp and Albany Highway on-ramp, 31 MarchGreenhithe Road eastbound on-ramp, 31 MarchWestbound lanes between Squadron Drive off-ramp and Hobsonville Road on-ramp, 30 March (approx. 10:00pm to 5:00am)Brigham Creek Road westbound on-ramp, 30 MarchSH18 westbound to SH16 southbound link, 30 March SOUTHWESTERN MOTORWAY (SH20)Northbound lanes between Cavendish Drive off-ramp and Kirkbride Road on-ramp, 3 April (approx. 10:00pm to 5:00am)SH20 northbound to SH20A southbound link, 3 April (approx. 10:00pm to 5:00am)Massey Road northbound on-ramp, 3 AprilPuhinui Road northbound on-ramp, 3 AprilCavendish Drive northbound on-ramp, 3 AprilNorthbound lanes between Cavendish Drive off-ramp and Massey Road on-ramp, 2 April (approx. 10:00pm to 5:00am)Puhinui Road northbound on-ramp, 2 AprilCavendish Drive northbound on-ramp, 2 April STATE HIGHWAY 2 (SH2)Eastbound lanes between Mangatawhiri off-ramp and Rawiri Road, 2 AprilWestbound lanes between Rawiri Road and Mangatawhiri Road, 2 AprilMangatangi westbound off-ramp, 2 AprilKoheroa Road westbound off-ramp, 2 AprilKoheroa Road westbound on-ramp, 2 April