On Monday, police received a complaint from a member of the public about a driver unsafely overtaking other traffic.
The vehicle was located about 9.45am travelling at 139 km/h on SH97 near Five Rivers. The driver was issued with infringement notices for speed and unsafe overtaking.
One tourist driver was issued two fines for speeding within a short period of time by different police patrols.
Acting road policing manager Senior Sergeant Steve Larking said monitoring the holiday routes around Queenstown, Kingston and Te Anau was an increased focus for police.
"We know that we get lots of complaints about driving behaviour on these roads over the summer. The high police presence is aimed at deterring bad driving behaviour, preventing and reducing crashes, and responding quickly and effectively to complaints from the public."
Police would continue to use unmarked highway patrol cars throughout the coming months and speed cameras would be deployed across Southland and Otago over the holiday period.