The crash has now been cleared, but traffic is still reported as being heavy in the area.
Police thanked motorists for their patience while emergency services worked to clear the scene.
SH2 PETONE TO NGAURANGA, SOUTHBOUND - CRASH - 11:30AM Due to a crash, both southbound lanes are BLOCKED just south of Petone on-ramp. Traffic is building quickly, please expect significant delays and consider delaying your journey if possible. ^EH pic.twitter.com/JGNvWP5Mig
— Waka Kotahi NZTA Wellington (@WakaKotahiWgtn) April 12, 2021