Boy racers were again targetted by police in Christchurch on Saturday night.
Hundreds of car enthusiasts were in the city for an annual event, the "V4 and Rotary" South Island champs. The city's four avenues were clogged as cars took to the streets in a continuous circuit.
At one stage, Harper Avenue, along Hagley Park, was completely closed.
Police say the overall behaviour of the drivers was good.
However, 300 tickets were issued, 67 vehicles were impounded for unpaid fines and 17 people were arrested for minor offences.