Average speed cameras have come into force on the A9 in Scotland.
They have been installed as part of a package of measures to improve safety along the route which runs between Perth and Inverness.
At the same time, in a move that has been welcomed by the freight industry and driver organisations alike, the 50 mph HGV speed limit trial gets underway in a bid to reduce driver frustration.
Transport Minister Keith Brown said: “Our efforts to improving safety on the A9 are underpinned by our commitment to dualling the A9 by 2025. This is clearly evidenced by our recent announcement regarding the four short-listed bidders for the Kincraig to Dalraddy section – a project we expect to get underway next summer, some six months earlier than originally planned.
"In the meantime, the A9 Safety Group ensures that key partners, such as the police, local authorities and transport and business groups are working closely to make a positive difference for A9 road users.
“The facts are clear that average speed cameras are effective in saving lives. Before and after studies of other average speed camera sites in the UK show, on average, they achieved a 61 per cent reduction in fatal and serious accidents. Average speed cameras encourage drivers to improve their behaviour and we are already seeing this on the A9.
“Together with the 50 mph HGV speed limit trial, we are introducing a level playing field for businesses who should benefit from less disruption and more reliable journey times due to a reduction in disruption caused by accidents.”