Boy-racers are using broken roads in Christchurch as racetracks at night.
Contractors repairing routes damaged in the magnitude 7.1 earthquake on 4 September say residents report speeding drivers drawn to stretches of loose stone chippings.
With road repairs going on across Christchurch, boy racers are speeding up over newly-laid gravel at night.
Fulton Hogan foreman Nathan Cast says the drivers are creating more misery for people who already have plenty of problems.
Cars picking up speed on gravel-strewn roads create huge clouds of dust, which gets into people's homes.
Christchurch City Council transport manger Alan Beuzenberg wants the drivers to show the residents some respect by slowing and avoiding damaged roads.
Contractors says that as well as speeding drivers, they are also dealing with portaloos have been tipped over and tagged.