Average speed cameras go live on section of North Coast 500

Average speed cameras measure the time it takes for vehicles to travel between two points

Average speed cameras have been temporarily installed on a road in Caithness which forms part of the NC500 tourist route.

Police Scotland said the move was in response to reports of speeding and an increase in traffic on the A836.

Cameras have been placed on a 10-mile stretch between Thurso and Reay, near the Dounreay nuclear power complex.

Police said the system was the first in the Highlands to be powered by renewable energy, including solar, which allows cameras to be deployed in more remote areas.

Average speed cameras measure vehicles as they travel between two points, making it harder for drivers to simply slow down as they pass a single checkpoint.

A system has been operational on the A9 in the Highlands since 2014.

Police Scotland's North Safety Camera Unit said renewable energy meant cameras could now be used in areas where it was not previously possible.

Unit manager Eric Dunion said: "Our priority is firmly focused on helping to reduce road casualties and improving road safety by slower motorists down and making them think about their driving behaviours.

"The introduction of these new temporary cameras on the A836 will hopefully do just that."

The NC500 driving route through some of Scotland's most spectacular scenery has boosted visitor numbers but has also led to pressures on infrastructure and reports of speeding.

Roads in the area are also becoming busier with traffic linked to logging or wind farms.