The drivers, aged 18 to 56, were caught in Caithness, Easter and Wester Ross and the Black Isle
Nine drivers will be reported by the police for drink or drug driving offences in the Highlands during the past week.
"We owe it to the family and friends to make every effort to recover Renee and Andrew’s bodies," says DCI Brian Geddes.
"Our hopes are slim but this case will never be considered resolved until we find Renee and Andrew," say police.
A total of a dozen drivers were reported for speeding and other offences on the NC500 over a two-day targeted operation.
Police Scotland are appealing for information to help trace two dirt bikes which were reported stolen at the end of July in Easter Ross.
Acting chief Inspector Stuart Fitzpatrick is taking overall control of policing the Caithness, Sutherland and Easter Ross area.
More people are being blackmailed over intimate images shared online police have said.
Officers are appealing for information following what they describe was a serious crash at around 1.10pm today.
The woman whose body was recovered after the murder-suicide at Keiss has been named locally as Caroline Copland.
