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, 14 March 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 Warkworth roundabout and Silverdale on-ramp, 19 MarchPuhoi southbound on-ramp, 19 MarchOrewa southbound on-ramp, 19 MarchMillwater southbound on-ramp, 19 MarchNorthbound lanes between Silverdale off-ramp and Warkworth roundabout, 18 MarchOrewa northbound on-ramp, 18 MarchSilverdale northbound on-ramp, 18 MarchOnewa Road northbound off-ramp, 16 MarchStafford Road northbound off-ramp, 16 &17-20 MarchCurran Street northbound on-ramp, 16 & 17-20 March CENTRAL MOTORWAY JUNCTION (CMJ) Hobson Street southbound on-ramp, 19 MarchWestbound lanes between Tamaki Drive and Beach Road/Parnell Rise, 18-19 March SOUTHERN MOTORWAY (SH1) Northbound lanes between East Tamaki Road off-ramp and Mt Wellington Highway on-ramp, 19-20 March (approx. 10:00pm to 5:00am)Princes Street northbound on-ramp, 19-20 MarchHighbrook Drive northbound on-ramp, 19-20 MarchEast Tamaki Road northbound on-ramp, 19-20 MarchSouthbound lanes between East Tamaki Road off-ramp and Redoubt Road on-ramp, 16-18 March (approx. 10:00pm to 5:00am)East Tamaki Road southbound on-ramp, 16-18 MarchSH1 southbound to SH20 northbound link, 16-18 March (approx. 10:00pm to 5:00am)Southbound lanes between Takanini off-ramp and Papakura on-ramp, 20 MarchTakanini southbound on-ramp, 20 MarchPapakura southbound off-ramp, 19 MarchSouthbound lanes between Papakura off-ramp and Drury/SH22 on-ramp, 16-18 MarchPapakura (Loop) southbound on-ramp, 16-18 MarchPapakura (Diamond) southbound on-ramp, 16-18 MarchDrury/SH22 southbound off-ramp, 20 MarchNorthbound lanes between Drury/SH22 off-ramp and Papakura on-ramp, 16 & 19-20 MarchDrury/SH22 northbound on-ramp, 16 & 19-20 MarchNorthbound lanes between Ramarama off-ramp and Papakura on-ramp, 17-18 MarchDrury/SH22 northbound on-ramp, 17-18 MarchRamarama northbound on-ramp, 17-18 MarchSouthbound lanes between Hampton Downs off-ramp and Hampton Downs on-ramp, 17 MarchNorthbound lanes between Hampton Downs off-ramp and Hampton Downs on-ramp, 17 MarchSouthbound lanes between Hampton Downs off-ramp and Rangiriri on-ramp, 16 MarchHampton Downs southbound on-ramp, 16 MarchTe Kauwhata southbound on-ramp, 16 MarchNORTHWESTERN MOTORWAY (SH16) Southbound lanes between Waimauku roundabout and Trigg Road, 16-20 March (approx. 8:00pm to 5:00am)Northbound lanes between Trigg Road and Waimauku roundabout, 16-20 March (approx. 8:00pm to 5:00am)Newton Road westbound on-ramp, 19-20 March UPPER HARBOUR MOTORWAY (SH18) Eastbound lanes between Tauhinu Road off-ramp and Albany Highway on-ramp, 17-20 MarchGreenhithe Road eastbound on-ramp, 17-20 March SOUTHWESTERN MOTORWAY (SH20) Queenstown Road southbound on-ramp, 16-17 MarchNeilson Street southbound off-ramp, 16-17 March