Construction has started on an average-speed camera system on the A9 between Perth and Inverness.
The system is one of a number of measures that have been promoted by the A9 Safety Group in a bid to improve safety in recent years.
The A9 is regarded as one of the country's most dangerous roads, with fatal and serious road accidents on the single carriageway between Perth and Inverness significantly higher than the national average.
The latest fatality came on Sunday, when a 63-year-old man from the Aberdeen area crashed on the dual carriageway between Perth and Stirling, near the junction with the A824.
Construction on the new camera system will see columns, cameras and infrared lighting masts erected on the single-carriageway sections, with a total of 27 sites along the route.
Engineers will test the equipment prior to it going live in October.
The installation of the cameras comes as the Scottish Government moves forward with its plan to make the route a dual carriageway.
The £3 billion project involves the upgrade of 80 miles of single carriageway along the A9 between Perth and Inverness by 2025.
Stewart Leggett, chairman of the A9 Safety Group, said: "The A9 Safety Group is clear that the deployment of average-speed cameras on the A9 will improve safety.
"Average-speed cameras have proven effective in reducing casualties where they have been deployed and they are a key part of the wider plan to improve safety."