Further ground investigations are to start on Monday on two sections of the A9, one of them in the Highlands.
More work towards dualling will take place on the southern stretch between Tay Crossing and Ballinluig and on the northern section between Tomatin and Moy. Both sets of works are expected to last around eight weeks.
Some traffic management measures will be required when necessary to allow work beside the carriageway to be carried out safely. This will include alternate single file traffic sections controlled by temporary traffic signals.
A Transport Scotland spokesperson said: “This further ground investigation work is needed to get important information on the existing ground conditions in the vicinity of the A9 carriageway for two stretches of the route to be dualled between Tay Crossing and Ballinluig and further north between Tomatin and Moy.
“We apologise for any inconvenience these works will cause and would thank road users and local communities in advance for their patience during the works. The contractor will closely monitor the operation of the traffic management measures to ensure that delays are kept to a minimum.
“While we do not expect major disruption to traffic, we would ask drivers to plan their journeys in advance using the Traffic Scotland website, twitter feed or Traffic Scotland radio.”