An investigation has been urged after “lethal” 15-hour-day job adverts appeared for the Aberdeen bypass.
Adverts for the Aberdeen Western Peripheral Route (AWPR) had appeared online from agencies looking for people to work up to 80 hours a week.
In one of the adverts, for a wheeled excavator driver, it said the job was for “up to 15 hours a day plus weekends” for 10-15 weeks.
In another, two 360-wheeled drivers were sought to work for 70-80 hours a week for a six to eight-week period.
The AWPR is being built by contractor Aberdeen Roads Limited (ARL) which is a partnership between Balfour Beatty and Galliford Try.
The Unite union has called for a full investigation by the Scottish Government regarding the adverts.
Steve Dillon, regional co-ordinating officer for the union, said: “The latest revelations about the Aberdeen bypass project are disgusting. Such long hours are lethal.
“Workers cannot work safely if they are undertaking such long hours.
“This is exactly how mistakes occur and too often result in tragic accidents.
“This is the latest scandal to hit the troubled Aberdeen bypass and the Scottish Government and the Health and Safety Executive can no longer simply sweep these problems under the carpet.
“There must be an immediate investigation into what is occurring and if necessary work should be stopped to ensure that safe, legal processes are in place.
“The rush to finish this already delayed project must not in any way be at the expense of workers’ safety or conditions.”
Aberdeen Roads Limited declined to comment, referring all inquiries to Transport Scotland.
A spokesman for Transport Scotland said:“The AWPR/B-T contractor has confirmed that it does not recognise the recruitment adverts mentioned.
“No roles of this description have been placed by the contractor online or anywhere else.
“As soon as it became aware of the advert, the recruitment agency was contacted and requested that the advertisement be removed.
“The contractor has also confirmed that its directly employed staff and operatives work to standard terms and conditions and any overtime is undertaken on a voluntary basis.
“Transport Scotland, which met with Unite earlier today to better understand the accusations being made, would also like to add that the health and safety of those working on all major infrastructure projects and the surrounding community are of the utmost importance.
“As such, it will investigate all claims highlighted in relation to health and safety.”