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, 22 March 2024.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 Warkworth Roundabout and Silverdale on-ramp, 20 MarchPuhoi southbound on-ramp, 20 MarchOrewa southbound on-ramp, 20 MarchMillwater southbound on-ramp, 20 MarchNorthbound lanes between Silverdale off-ramp and Warkworth Roundabout, 19 MarchOrewa northbound on-ramp, 19 MarchSilverdale northbound on-ramp, 19 MarchSouthbound lanes between Constellation Drive off-ramp and Northcote Road on-ramp, 17 March (approx. 10:00pm to 5:00am)Constellation Drive southbound on-ramp, 17 MarchTristram Avenue southbound on-ramp, 17 MarchCurran Street northbound on-ramp, 19-21 MarchShelly Beach Road southbound off-ramp, 17-21 MarchCENTRAL MOTORWAY JUNCTION (CMJ)Eastbound lanes between Wellesley Street East (SH1) off ramp and Alten Road, 17-21 March (approx. 10:00pm to 5:00am)Eastbound lanes between Wellesley Street East (SH16) off ramp and Alten Road, 17-21 March (approx. 10:00pm to 5:00am)Grafton Road eastbound on-ramp, 17-21 MarchWestbound lanes between Stanley Street off-ramp and Wellesley Street East on-ramp, 17-21 March (approx. 10:00pm to 5:00am)SOUTHERN MOTORWAY (SH1)St Marks Road southbound on-ramp, 20 March (approx. 8:00pm to 5:00am)Market Road southbound off-ramp, 20 March (approx. 8:00pm to 5:00am)Market Road northbound off-ramp, 17-19 March (approx. 9:30pm to 5:00am)SH1 southbound to SH20 northbound link, 20 MarchRedoubt Road southbound on-ramp, 20 MarchSouthbound lanes between Takanini off-ramp and Papakura on-ramp, 17-21 March (approx. 10:00pm to 5:00am)Northbound lanes between Drury/SH22 off-ramp and Takanini on-ramp, 21 MarchPapakura (Diamond) northbound on-ramp, 21-21 MarchPapakura (Loop) northbound on-ramp, 21-21 MarchPapakura northbound off-ramp, 15-23 March (24/7)Northbound lanes between Drury/SH22 off-ramp and Papakura on-ramp, 17 & 19-20 MarchDrury/SH22 northbound on-ramp, 17 & 19-21 MarchDrury/SH22 northbound off-ramp, 15 March (approx. 12 Midnight to 5:00am)Beaver Road northbound on-ramp, 17 & 19 MarchBeaver Road northbound off-ramp, 17 & 19 MarchNikau Road northbound on-ramp, 17 & 19 MarchSouthbound lanes between Nikau Road off-ramp and Nikau Road on-ramp, 18 & 21 March (approx. 9:30pm to 5:00am)Northbound lanes between Ridge Road off-ramp and Nikau Road on-ramp, 18 & 21 March (approx. 9:30pm to 5:00am)Razorback Road northbound on-ramp, 18 March (approx. 8:00pm to 5:00am)SH1 northbound to SH2 eastbound link, 18 March (approx. 9:30pm to 5:00am)Pokeno northbound on-ramp, 18 March (approx. 8:00pm to 5:00am)Razorback Road southbound off-ramp, 21 March (approx. 9:30pm to 5:00am)SH1 southbound to SH2 eastbound link, 21 March (approx. 9:30pm to 5:00am)Southbound lanes between Pokeno off-ramp and Pokeno on-ramp, 21 March (approx. 9:30pm to 5:00am)Northbound lanes between Pokeno off-ramp and Pokeno on-ramp, 21 March (approx. 9:30pm to 5:00am)Southbound lanes between Mercer off-ramp and Mercer on-ramp, 19 March (approx. 10:00pm to 5:00am)Northbound lanes between Mercer off-ramp and Mercer on-ramp, 19 March (approx. 10:00pm to 5:00am)Te Kauwhata southbound off-ramp, 17-21 March (24/7)Te Kauwhata southbound on-ramp, 17-21 March (24/7) Rangiriri southbound off-ramp, 17-21 March (24/7)NORTHWESTERN MOTORWAY (SH16)Southbound lanes between Waimauku roundabout and Trigg Road, 17-21 MarchNorthbound lanes between Trigg Road and Waimauku roundabout, 17-21 MarchTe Atatu Road (Diamond) southbound on-ramp 20-21 MarchUPPER HARBOUR MOTORWAY (SH18)None plannedSOUTHWESTERN MOTORWAY (SH20)Massey Road southbound off-ramp, 17 & 21 March (approx. 10:00pm to 5:00am)Massey Road southbound off-ramp, 19-20 MarchMassey Road southbound on-ramp, 19-20 MarchCavendish Drive southbound on-ramp, 21 MarchSTATE HIGHWAY 2 (SH2)SH2 westbound to SH1 southbound link, 21 March (approx. 9:30pm to 5:00am)Please follow the signposted detours. NZ Transport Agency thanks you for your co-operation during these essential improvements and maintenance.