State Highway 1 near the turn-off to Paekakariki on the Kapiti Coast has re-opened following a crash.
Police said those involved had minor to moderate injuries. The crash at about 1pm caused significant traffic delays as the northbound lane was blocked.
It follows a fatal crash in the Terrace Tunnel in Wellington this morning, which led to heavy congestion during the morning rush hour while the tunnel was closed.
One person died in this morning's crash after a truck and car collided in the tunnel on State Highway 1.
Meanwhile the Mt Victoria Tunnel was also closed in both directions for a short time late morning because of a breakdown.