The weather's causing huge delays tonight for people trying to leave the Turoa ski field on Mount Ruapehu.

Motorists have taken to social media, saying they have been stuck on Turoa ski field road for hours.

Roading crews are working to get vehicles down the hill safely, with delays caused by extreme congestion and treacherous weather conditions.

Traffic was blocked from leaving the carpark earlier his evening, after a skidding car ploughed into a pedestrian.

The person was eventually airlifted to Whanganui Hospital in a moderate condition.