Average speed cameras are being installed on the A9 in Scotland.
Columns, cameras and infrared lighting masts are being erected on the single carriageway sections with a total of 27 sites along the route which runs between Perth and Inverness.
As the equipment is installed engineers will commence the testing and calibration of the equipment prior to it going live in October.
The Average Speed Camera System (ASCS) 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.
More than £137 million has been invested in safety and structural improvements on the route since 2007. This includes improved consistency of signing and lining, improved geometry and safety barrier works as well as variable messaging signs displaying journey times.
The ASCS is being supplied and installed by Vysionics, on behalf of Transport Scotland.
Chair of the A9 Safety Group Stewart Leggett said: “The A9 Safety Group is clear that the deployment of average speed cameras on the A9 will improve safety for all users by improving driver behaviour and reducing the unacceptable levels of speeding currently recorded on the route. 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 the safety of everyone using the A9, both in advance of, and during the dualling of this vital route.
“The average speed camera system is only a small part of the overall investment making up the interim safety plan for the A9. We are committed to maintaining the route and managing its safe and effective use, both before and during the forthcoming dualling programme.”
